./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/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_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/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_ad6c2478-5468-4a08-898e-4bd6f1158f0f/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 f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:25:54,084 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:25:54,165 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:25:54,171 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:25:54,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:25:54,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:25:54,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:25:54,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:25:54,210 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:25:54,210 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:25:54,210 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:25:54,211 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:25:54,212 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:25:54,213 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:25:54,215 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:25:54,216 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:25:54,216 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:25:54,216 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:25:54,217 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:25:54,217 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:25:54,217 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:25:54,218 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:25:54,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:25:54,219 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:25:54,219 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:25:54,220 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:25:54,220 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:25:54,220 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:25:54,221 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:25:54,221 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:25:54,221 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:25:54,222 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:25:54,222 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:25:54,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:25:54,223 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:25:54,223 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:25:54,224 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:25:54,224 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:25:54,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:54,225 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:25:54,225 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:25:54,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:25:54,226 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:25:54,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:25:54,226 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:25:54,227 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:25:54,227 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:25:54,227 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_ad6c2478-5468-4a08-898e-4bd6f1158f0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2024-11-02 11:25:54,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:25:54,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:25:54,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:25:54,562 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:25:54,562 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:25:54,564 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i Unable to find full path for "g++" [2024-11-02 11:25:56,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:25:57,441 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:25:57,443 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2024-11-02 11:25:57,462 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/data/59ed18aa9/3d686d34434f4300aff4bd5beb901c1f/FLAGf39007168 [2024-11-02 11:25:57,529 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/data/59ed18aa9/3d686d34434f4300aff4bd5beb901c1f [2024-11-02 11:25:57,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:25:57,534 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:25:57,537 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:57,537 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:25:57,544 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:25:57,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f703e92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57, skipping insertion in model container [2024-11-02 11:25:57,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,603 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:25:58,017 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_ad6c2478-5468-4a08-898e-4bd6f1158f0f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2024-11-02 11:25:58,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:58,083 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:25:58,131 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_ad6c2478-5468-4a08-898e-4bd6f1158f0f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2024-11-02 11:25:58,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:58,190 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:25:58,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58 WrapperNode [2024-11-02 11:25:58,196 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:58,197 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:58,197 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:25:58,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:25:58,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,221 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,254 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 205 [2024-11-02 11:25:58,255 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:58,255 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:25:58,256 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:25:58,256 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:25:58,266 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,272 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:25:58,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:25:58,316 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:25:58,316 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:25:58,317 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:58,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:58,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:25:58,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:25:58,393 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2024-11-02 11:25:58,393 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2024-11-02 11:25:58,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 11:25:58,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:25:58,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 11:25:58,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 11:25:58,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 11:25:58,394 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2024-11-02 11:25:58,395 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2024-11-02 11:25:58,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:25:58,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 11:25:58,395 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2024-11-02 11:25:58,395 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2024-11-02 11:25:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:25:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2024-11-02 11:25:58,396 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2024-11-02 11:25:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:25:58,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:25:58,547 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:25:58,549 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:25:59,136 INFO L? ?]: Removed 48 outVars from TransFormulas that were not future-live. [2024-11-02 11:25:59,136 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:25:59,347 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:25:59,347 INFO L316 CfgBuilder]: Removed 33 assume(true) statements. [2024-11-02 11:25:59,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:59 BoogieIcfgContainer [2024-11-02 11:25:59,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:25:59,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:25:59,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:25:59,367 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:25:59,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:25:57" (1/3) ... [2024-11-02 11:25:59,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6223cdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:59, skipping insertion in model container [2024-11-02 11:25:59,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (2/3) ... [2024-11-02 11:25:59,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6223cdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:59, skipping insertion in model container [2024-11-02 11:25:59,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:59" (3/3) ... [2024-11-02 11:25:59,375 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2024-11-02 11:25:59,423 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:25:59,423 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:25:59,492 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:25:59,502 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;@47323624, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:25:59,503 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:25:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 65 states have internal predecessors, (97), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-02 11:25:59,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 11:25:59,516 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:59,517 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:59,518 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:59,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash 624527765, now seen corresponding path program 1 times [2024-11-02 11:25:59,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:59,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249833716] [2024-11-02 11:25:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:59,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:59,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:59,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249833716] [2024-11-02 11:25:59,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249833716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:59,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:59,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:25:59,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384250791] [2024-11-02 11:25:59,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:59,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 11:25:59,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 11:25:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 11:25:59,874 INFO L87 Difference]: Start difference. First operand has 78 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 65 states have internal predecessors, (97), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:25:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:59,966 INFO L93 Difference]: Finished difference Result 151 states and 261 transitions. [2024-11-02 11:25:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 11:25:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-02 11:25:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:59,977 INFO L225 Difference]: With dead ends: 151 [2024-11-02 11:25:59,978 INFO L226 Difference]: Without dead ends: 74 [2024-11-02 11:25:59,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 11:25:59,985 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:59,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:26:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-02 11:26:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-02 11:26:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 62 states have internal predecessors, (69), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-02 11:26:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2024-11-02 11:26:00,041 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 13 [2024-11-02 11:26:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:00,044 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2024-11-02 11:26:00,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:26:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2024-11-02 11:26:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 11:26:00,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:00,049 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:00,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:26:00,051 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:00,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1600298382, now seen corresponding path program 1 times [2024-11-02 11:26:00,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:00,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583872549] [2024-11-02 11:26:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:00,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:01,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:01,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583872549] [2024-11-02 11:26:01,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583872549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:01,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:01,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-02 11:26:01,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079073075] [2024-11-02 11:26:01,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:01,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 11:26:01,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:01,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 11:26:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-02 11:26:01,781 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 13 states, 8 states have (on average 2.0) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:26:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:02,920 INFO L93 Difference]: Finished difference Result 108 states and 138 transitions. [2024-11-02 11:26:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 11:26:02,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 2.0) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-02 11:26:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:02,924 INFO L225 Difference]: With dead ends: 108 [2024-11-02 11:26:02,927 INFO L226 Difference]: Without dead ends: 105 [2024-11-02 11:26:02,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-02 11:26:02,930 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 96 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:02,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 279 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 11:26:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-02 11:26:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2024-11-02 11:26:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 72 states have internal predecessors, (82), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-02 11:26:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2024-11-02 11:26:02,963 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 22 [2024-11-02 11:26:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:02,964 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2024-11-02 11:26:02,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 2.0) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:26:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2024-11-02 11:26:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 11:26:02,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:02,966 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:02,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:26:02,966 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:02,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:02,971 INFO L85 PathProgramCache]: Analyzing trace with hash -295478788, now seen corresponding path program 1 times [2024-11-02 11:26:02,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:02,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339536727] [2024-11-02 11:26:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:04,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:04,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339536727] [2024-11-02 11:26:04,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339536727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:04,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849658424] [2024-11-02 11:26:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:04,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:04,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:04,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:04,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad6c2478-5468-4a08-898e-4bd6f1158f0f/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:26:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:04,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-02 11:26:04,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:04,835 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-02 11:26:04,836 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 45 treesize of output 41 [2024-11-02 11:26:04,937 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 27 treesize of output 22 [2024-11-02 11:26:05,010 INFO L349 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2024-11-02 11:26:05,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 115 [2024-11-02 11:26:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:26:05,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 3 [2024-11-02 11:26:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:26:05,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 7 [2024-11-02 11:26:05,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:26:05,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 42 [2024-11-02 11:26:05,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2024-11-02 11:26:05,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 118 [2024-11-02 11:26:05,928 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 12 treesize of output 11 [2024-11-02 11:26:05,937 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 129 [2024-11-02 11:26:06,002 INFO L349 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2024-11-02 11:26:06,003 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 148 [2024-11-02 11:26:06,223 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 9 treesize of output 7 [2024-11-02 11:26:06,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:26:06,267 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 92 treesize of output 96 [2024-11-02 11:26:06,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 93 [2024-11-02 11:26:06,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:26:06,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 91 [2024-11-02 11:26:07,219 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-02 11:26:07,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 141 [2024-11-02 11:26:07,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 11:26:07,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 107 [2024-11-02 11:26:07,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:26:07,828 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-02 11:26:07,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2024-11-02 11:26:07,939 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 11:26:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:08,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:08,085 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_chain_node_alloc_node_~ptr~0#1.base_34| Int) (v_ArrVal_247 (Array Int Int)) (v_ArrVal_246 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_chain_node_alloc_node_~ptr~0#1.base_34| 1)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |v_chain_node_alloc_node_~ptr~0#1.base_34| v_ArrVal_246) |c_ULTIMATE.start_create_sll_~#list~0#1.base| v_ArrVal_247) |c_ULTIMATE.start_main_~#p2~0#1.base|) |c_ULTIMATE.start_main_~#p2~0#1.offset|) 0)))) is different from false [2024-11-02 11:26:08,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849658424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:08,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694036887] [2024-11-02 11:26:08,111 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-02 11:26:08,111 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:08,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:08,120 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:08,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:13,664 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 257 for LOIs [2024-11-02 11:26:13,948 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 298 for LOIs [2024-11-02 11:26:17,153 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 297 for LOIs [2024-11-02 11:26:17,935 INFO L180 IcfgInterpreter]: Interpretation finished