./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/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_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b0035e4df062aac8021cee981905a3c98f2d4e312e33b913ded157af60b9640 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:35:58,478 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:35:58,586 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 12:35:58,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:35:58,594 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:35:58,634 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:35:58,635 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:35:58,635 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:35:58,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:35:58,636 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:35:58,638 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:35:58,639 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:35:58,639 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:35:58,641 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:35:58,641 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:35:58,642 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:35:58,642 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:35:58,642 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:35:58,642 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:35:58,643 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:35:58,643 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:35:58,649 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:35:58,650 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:35:58,650 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:35:58,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:35:58,651 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:35:58,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:35:58,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:35:58,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:35:58,651 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:35:58,652 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:35:58,652 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:35:58,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:35:58,653 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:35:58,653 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:35:58,654 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:35:58,654 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:35:58,654 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:35:58,655 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:35:58,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:35:58,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:35:58,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:35:58,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:35:58,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:35:58,656 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:35:58,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:35:58,657 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:35:58,657 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:35:58,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:35:58,657 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_3a891b96-a35c-448a-97ef-a4bd9b45a46a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b0035e4df062aac8021cee981905a3c98f2d4e312e33b913ded157af60b9640 [2024-11-02 12:35:58,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:35:59,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:35:59,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:35:59,051 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:35:59,052 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:35:59,053 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i Unable to find full path for "g++" [2024-11-02 12:36:01,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:36:01,750 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:36:01,750 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i [2024-11-02 12:36:01,774 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/data/efaac23d3/70a5b973af0d48db98207e42b58f04d0/FLAG000fa9886 [2024-11-02 12:36:01,811 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/data/efaac23d3/70a5b973af0d48db98207e42b58f04d0 [2024-11-02 12:36:01,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:36:01,817 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:36:01,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:01,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:36:01,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:36:01,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:01" (1/1) ... [2024-11-02 12:36:01,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fba811e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:01, skipping insertion in model container [2024-11-02 12:36:01,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:01" (1/1) ... [2024-11-02 12:36:01,875 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:36:02,346 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-02 12:36:02,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:02,376 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:36:02,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:02,492 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:36:02,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02 WrapperNode [2024-11-02 12:36:02,493 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:02,494 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:02,494 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:36:02,495 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:36:02,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,543 INFO L138 Inliner]: procedures = 114, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2024-11-02 12:36:02,544 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:02,544 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:36:02,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:36:02,545 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:36:02,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,569 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,581 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:36:02,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:36:02,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:36:02,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:36:02,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (1/1) ... [2024-11-02 12:36:02,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:02,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:36:02,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:36:02,718 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2024-11-02 12:36:02,718 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2024-11-02 12:36:02,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:36:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:36:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:36:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:36:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:36:02,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:36:02,874 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:36:02,878 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:36:03,070 INFO L? ?]: Removed 33 outVars from TransFormulas that were not future-live. [2024-11-02 12:36:03,071 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:36:03,114 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:36:03,114 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-02 12:36:03,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:03 BoogieIcfgContainer [2024-11-02 12:36:03,115 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:36:03,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:36:03,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:36:03,122 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:36:03,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:36:01" (1/3) ... [2024-11-02 12:36:03,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282a96df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:03, skipping insertion in model container [2024-11-02 12:36:03,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:02" (2/3) ... [2024-11-02 12:36:03,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282a96df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:03, skipping insertion in model container [2024-11-02 12:36:03,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:03" (3/3) ... [2024-11-02 12:36:03,127 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy-2.i [2024-11-02 12:36:03,147 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:36:03,147 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-02 12:36:03,207 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:36:03,214 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=None, 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;@6bf6dbc5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:36:03,215 INFO L334 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-11-02 12:36:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 13 states have (on average 2.0) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 12:36:03,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:03,228 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:03,229 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-02 12:36:03,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:03,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1234311600, now seen corresponding path program 1 times [2024-11-02 12:36:03,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:03,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22845066] [2024-11-02 12:36:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:03,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:03,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:03,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22845066] [2024-11-02 12:36:03,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22845066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:03,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688055523] [2024-11-02 12:36:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:03,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:03,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:03,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:36:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:04,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-02 12:36:04,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:04,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 12:36:04,166 WARN L873 $PredicateComparison]: unable to prove that (exists ((|alloc_node_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |alloc_node_~temp~0#1.base| (select |c_#valid| |alloc_node_~temp~0#1.base|))) (= (select |c_old(#valid)| |alloc_node_~temp~0#1.base|) 0))) is different from true [2024-11-02 12:36:04,230 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-02 12:36:04,232 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 19 treesize of output 16 [2024-11-02 12:36:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-02 12:36:04,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:04,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688055523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:04,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [997240836] [2024-11-02 12:36:04,364 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:36:04,365 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:04,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:04,383 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:04,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:36:04,707 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_node with input of size 36 for LOIs [2024-11-02 12:36:04,785 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:36:07,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~s~0#1.base_25| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_main_~s~0#1.base_25|) 1)) (or (and (<= (+ |v_ULTIMATE.start_main_~s~0#1.base_25| 1) |#StackHeapBarrier|) (not (= |v_ULTIMATE.start_main_~s~0#1.base_25| 0)) (<= (+ |ULTIMATE.start_main_#t~ret4#1.base| 1) |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_39| (Array Int Int))) (= (select |v_#valid_39| |v_ULTIMATE.start_main_~s~0#1.base_25|) 0)) (exists ((|v_#length_23| (Array Int Int))) (= |#length| (store |v_#length_23| |ULTIMATE.start_main_#t~ret4#1.base| 4))) (exists ((|v_#valid_38| (Array Int Int))) (and (= (select |v_#valid_38| |ULTIMATE.start_main_#t~ret4#1.base|) 0) (= |#valid| (store |v_#valid_38| |ULTIMATE.start_main_#t~ret4#1.base| 1)))) (not (= |ULTIMATE.start_main_#t~ret4#1.base| 0))) (and (exists ((|v_#valid_40| (Array Int Int))) (= (select |v_#valid_40| |v_ULTIMATE.start_main_~s~0#1.base_25|) 0)) (<= (+ |v_ULTIMATE.start_main_~s~0#1.base_25| 1) |#StackHeapBarrier|) (not (= |v_ULTIMATE.start_main_~s~0#1.base_25| 0)) (<= (+ |ULTIMATE.start_main_#t~ret4#1.base| 1) |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#length_23| (Array Int Int))) (= |#length| (store |v_#length_23| |ULTIMATE.start_main_#t~ret4#1.base| 4))) (exists ((|v_#valid_38| (Array Int Int))) (and (= (select |v_#valid_38| |ULTIMATE.start_main_#t~ret4#1.base|) 0) (= |#valid| (store |v_#valid_38| |ULTIMATE.start_main_#t~ret4#1.base| 1)))) (not (= |ULTIMATE.start_main_#t~ret4#1.base| 0)))))) (= |ULTIMATE.start_main_#t~ret4#1.offset| 0) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2024-11-02 12:36:07,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:36:07,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:36:07,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2024-11-02 12:36:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312877511] [2024-11-02 12:36:07,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 12:36:07,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:36:07,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:07,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:36:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=260, Unknown=2, NotChecked=32, Total=342 [2024-11-02 12:36:07,784 INFO L87 Difference]: Start difference. First operand has 29 states, 13 states have (on average 2.0) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:36:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:08,029 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-11-02 12:36:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:36:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 11 [2024-11-02 12:36:08,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:08,038 INFO L225 Difference]: With dead ends: 25 [2024-11-02 12:36:08,038 INFO L226 Difference]: Without dead ends: 23 [2024-11-02 12:36:08,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=59, Invalid=323, Unknown=2, NotChecked=36, Total=420 [2024-11-02 12:36:08,044 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:08,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 33 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2024-11-02 12:36:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-02 12:36:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-02 12:36:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-11-02 12:36:08,079 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 11 [2024-11-02 12:36:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:08,081 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-11-02 12:36:08,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:36:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-11-02 12:36:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 12:36:08,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:08,083 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:08,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:36:08,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-02 12:36:08,284 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-02 12:36:08,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1234311601, now seen corresponding path program 1 times [2024-11-02 12:36:08,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:08,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319725258] [2024-11-02 12:36:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:08,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:08,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319725258] [2024-11-02 12:36:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319725258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099480833] [2024-11-02 12:36:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:08,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:08,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:08,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:36:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:08,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-02 12:36:08,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:08,910 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 8 treesize of output 1 [2024-11-02 12:36:09,120 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-02 12:36:09,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-02 12:36:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:09,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:09,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099480833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:09,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985343687] [2024-11-02 12:36:09,502 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:36:09,502 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:09,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:09,503 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:09,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:36:09,632 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_node with input of size 36 for LOIs [2024-11-02 12:36:09,679 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:36:10,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '216#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~ret4#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~s~0#1.base_27| Int)) (and (<= (select |#length| |v_ULTIMATE.start_main_~s~0#1.base_27|) 3) (or (and (exists ((|v_#valid_52| (Array Int Int))) (and (= (select |v_#valid_52| |ULTIMATE.start_main_#t~ret4#1.base|) 0) (= |#valid| (store |v_#valid_52| |ULTIMATE.start_main_#t~ret4#1.base| 1)))) (exists ((|v_#length_43| (Array Int Int))) (= |#length| (store |v_#length_43| |ULTIMATE.start_main_#t~ret4#1.base| 4))) (exists ((|v_#valid_54| (Array Int Int))) (= (select |v_#valid_54| |v_ULTIMATE.start_main_~s~0#1.base_27|) 0)) (<= (+ |ULTIMATE.start_main_#t~ret4#1.base| 1) |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (not (= |v_ULTIMATE.start_main_~s~0#1.base_27| 0)) (<= (+ |v_ULTIMATE.start_main_~s~0#1.base_27| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_#t~ret4#1.base| 0))) (and (exists ((|v_#valid_53| (Array Int Int))) (= (select |v_#valid_53| |v_ULTIMATE.start_main_~s~0#1.base_27|) 0)) (exists ((|v_#length_44| (Array Int Int))) (= |#length| (store |v_#length_44| |ULTIMATE.start_main_#t~ret4#1.base| 4))) (exists ((|v_#valid_52| (Array Int Int))) (and (= (select |v_#valid_52| |ULTIMATE.start_main_#t~ret4#1.base|) 0) (= |#valid| (store |v_#valid_52| |ULTIMATE.start_main_#t~ret4#1.base| 1)))) (<= (+ |ULTIMATE.start_main_#t~ret4#1.base| 1) |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (not (= |v_ULTIMATE.start_main_~s~0#1.base_27| 0)) (<= (+ |v_ULTIMATE.start_main_~s~0#1.base_27| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_#t~ret4#1.base| 0)))))))' at error location [2024-11-02 12:36:10,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:36:10,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:36:10,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-11-02 12:36:10,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905670245] [2024-11-02 12:36:10,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:36:10,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-02 12:36:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-02 12:36:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-11-02 12:36:10,533 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-02 12:36:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:10,910 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2024-11-02 12:36:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:36:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 11 [2024-11-02 12:36:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:10,912 INFO L225 Difference]: With dead ends: 20 [2024-11-02 12:36:10,912 INFO L226 Difference]: Without dead ends: 20 [2024-11-02 12:36:10,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-11-02 12:36:10,913 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:10,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 48 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-02 12:36:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-11-02 12:36:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2024-11-02 12:36:10,922 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 11 [2024-11-02 12:36:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:10,923 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2024-11-02 12:36:10,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-02 12:36:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2024-11-02 12:36:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:36:10,925 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:10,925 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:10,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:36:11,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-02 12:36:11,130 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-02 12:36:11,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash 762510746, now seen corresponding path program 1 times [2024-11-02 12:36:11,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:11,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406678823] [2024-11-02 12:36:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:11,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:36:11,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:11,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406678823] [2024-11-02 12:36:11,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406678823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:11,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:11,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:36:11,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036671286] [2024-11-02 12:36:11,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:11,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:36:11,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:11,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:36:11,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:11,305 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:36:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:11,379 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2024-11-02 12:36:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:36:11,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2024-11-02 12:36:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:11,382 INFO L225 Difference]: With dead ends: 18 [2024-11-02 12:36:11,382 INFO L226 Difference]: Without dead ends: 18 [2024-11-02 12:36:11,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:36:11,383 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:11,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-02 12:36:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-02 12:36:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2024-11-02 12:36:11,389 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2024-11-02 12:36:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:11,390 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2024-11-02 12:36:11,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:36:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2024-11-02 12:36:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:36:11,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:11,393 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:11,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:36:11,394 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-02 12:36:11,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash 762510747, now seen corresponding path program 1 times [2024-11-02 12:36:11,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:11,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784136038] [2024-11-02 12:36:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:36:11,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784136038] [2024-11-02 12:36:11,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784136038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:11,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:11,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:36:11,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190137424] [2024-11-02 12:36:11,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:11,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:36:11,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:36:11,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:11,640 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:36:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:11,720 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-11-02 12:36:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:36:11,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2024-11-02 12:36:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:11,722 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:36:11,722 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:36:11,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:36:11,724 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:11,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:11,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:36:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-02 12:36:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-11-02 12:36:11,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2024-11-02 12:36:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:11,732 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-11-02 12:36:11,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-02 12:36:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-11-02 12:36:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:36:11,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:11,733 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:11,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:36:11,733 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-02 12:36:11,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -124377448, now seen corresponding path program 1 times [2024-11-02 12:36:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876131659] [2024-11-02 12:36:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:36:11,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:11,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876131659] [2024-11-02 12:36:11,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876131659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:11,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024545870] [2024-11-02 12:36:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:11,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:11,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:11,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:11,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:36:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:11,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:36:11,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:36:11,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:36:11,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024545870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377266413] [2024-11-02 12:36:12,001 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-02 12:36:12,001 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:12,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:12,002 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:12,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:36:12,208 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_node with input of size 36 for LOIs [2024-11-02 12:36:12,235 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:36:13,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1377266413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:13,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:36:13,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5, 5] total 17 [2024-11-02 12:36:13,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002788087] [2024-11-02 12:36:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:13,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:36:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:36:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:36:13,632 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 14 states, 10 states have (on average 1.0) internal successors, (10), 10 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 12:36:15,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-02 12:36:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:16,057 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2024-11-02 12:36:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:36:16,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.0) internal successors, (10), 10 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 12:36:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:16,059 INFO L225 Difference]: With dead ends: 16 [2024-11-02 12:36:16,059 INFO L226 Difference]: Without dead ends: 16 [2024-11-02 12:36:16,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:36:16,060 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:16,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 3 Unknown, 0 Unchecked, 2.4s Time] [2024-11-02 12:36:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-02 12:36:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-02 12:36:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.0) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2024-11-02 12:36:16,064 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 16 [2024-11-02 12:36:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:16,065 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2024-11-02 12:36:16,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.0) internal successors, (10), 10 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 12:36:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2024-11-02 12:36:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:36:16,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:16,066 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:16,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:36:16,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:16,267 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-02 12:36:16,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:16,267 INFO L85 PathProgramCache]: Analyzing trace with hash 732358523, now seen corresponding path program 1 times [2024-11-02 12:36:16,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:16,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400804178] [2024-11-02 12:36:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:16,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:36:16,296 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-02 12:36:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:36:16,333 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-02 12:36:16,333 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-02 12:36:16,335 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (11 of 12 remaining) [2024-11-02 12:36:16,337 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2024-11-02 12:36:16,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2024-11-02 12:36:16,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2024-11-02 12:36:16,338 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2024-11-02 12:36:16,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2024-11-02 12:36:16,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2024-11-02 12:36:16,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2024-11-02 12:36:16,339 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 12 remaining) [2024-11-02 12:36:16,340 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (2 of 12 remaining) [2024-11-02 12:36:16,340 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (1 of 12 remaining) [2024-11-02 12:36:16,340 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (0 of 12 remaining) [2024-11-02 12:36:16,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:36:16,344 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-02 12:36:16,374 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-02 12:36:16,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 12:36:16 BoogieIcfgContainer [2024-11-02 12:36:16,380 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-02 12:36:16,381 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-02 12:36:16,381 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-02 12:36:16,381 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-02 12:36:16,382 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:03" (3/4) ... [2024-11-02 12:36:16,385 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-02 12:36:16,386 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-02 12:36:16,386 INFO L158 Benchmark]: Toolchain (without parser) took 14569.99ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 120.3MB in the beginning and 94.6MB in the end (delta: 25.7MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2024-11-02 12:36:16,387 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 115.3MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:36:16,387 INFO L158 Benchmark]: CACSL2BoogieTranslator took 674.93ms. Allocated memory is still 157.3MB. Free memory was 120.0MB in the beginning and 115.6MB in the end (delta: 4.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-02 12:36:16,388 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.68ms. Allocated memory is still 157.3MB. Free memory was 115.6MB in the beginning and 113.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:36:16,388 INFO L158 Benchmark]: Boogie Preprocessor took 48.94ms. Allocated memory is still 157.3MB. Free memory was 113.7MB in the beginning and 112.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:36:16,388 INFO L158 Benchmark]: RCFGBuilder took 521.02ms. Allocated memory is still 157.3MB. Free memory was 112.2MB in the beginning and 99.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-02 12:36:16,389 INFO L158 Benchmark]: TraceAbstraction took 13262.75ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 98.4MB in the beginning and 94.6MB in the end (delta: 3.8MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. [2024-11-02 12:36:16,389 INFO L158 Benchmark]: Witness Printer took 4.97ms. Allocated memory is still 188.7MB. Free memory is still 94.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:36:16,391 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 115.3MB. Free memory is still 83.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 674.93ms. Allocated memory is still 157.3MB. Free memory was 120.0MB in the beginning and 115.6MB in the end (delta: 4.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.68ms. Allocated memory is still 157.3MB. Free memory was 115.6MB in the beginning and 113.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.94ms. Allocated memory is still 157.3MB. Free memory was 113.7MB in the beginning and 112.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 521.02ms. Allocated memory is still 157.3MB. Free memory was 112.2MB in the beginning and 99.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13262.75ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 98.4MB in the beginning and 94.6MB in the end (delta: 3.8MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. * Witness Printer took 4.97ms. Allocated memory is still 188.7MB. Free memory is still 94.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 568]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 568. Possible FailurePath: [L569] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); [L563] COND FALSE !(((void *)0) == temp) [L566] return temp; [L569] RET, EXPR alloc_node() [L569] struct node* s = alloc_node(); [L570] CALL, EXPR alloc_node() [L562] struct node* temp = (struct node*) malloc(sizeof(struct node)); [L563] COND FALSE !(((void *)0) == temp) [L566] return temp; [L570] RET, EXPR alloc_node() VAL [s={-2:0}] [L570] s->next = alloc_node() [L571] EXPR s->next VAL [s={-2:0}] [L571] *s = *(s->next) [L572] free(s) [L572] free(s) [L572] free(s) [L573] return 0; VAL [\result=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 13.2s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 167 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 24 IncrementalHoareTripleChecker+Unchecked, 127 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 556 IncrementalHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 40 mSDtfsCounter, 556 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 119 ConstructedInterpolants, 7 QuantifiedInterpolants, 670 SizeOfPredicates, 2 NumberOfNonLiveVariables, 231 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 14/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 14, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 6, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 22, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 36, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 14, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 123, DAG_COMPRESSION_RETAINED_NODES: 38, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-02 12:36:16,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/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_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b0035e4df062aac8021cee981905a3c98f2d4e312e33b913ded157af60b9640 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:36:19,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:36:19,507 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2024-11-02 12:36:19,517 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:36:19,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:36:19,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:36:19,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:36:19,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:36:19,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:36:19,548 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:36:19,548 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:36:19,548 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:36:19,549 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:36:19,549 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:36:19,550 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:36:19,550 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:36:19,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:36:19,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:36:19,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:36:19,552 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:36:19,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:36:19,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:36:19,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:36:19,554 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:36:19,554 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:36:19,555 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:36:19,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:36:19,555 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:36:19,556 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 12:36:19,556 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:36:19,556 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 12:36:19,557 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:36:19,557 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:36:19,558 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:36:19,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:36:19,558 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 12:36:19,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:36:19,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:36:19,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:19,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:36:19,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:36:19,561 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-02 12:36:19,561 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 12:36:19,561 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:36:19,561 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:36:19,562 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:36:19,562 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_3a891b96-a35c-448a-97ef-a4bd9b45a46a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b0035e4df062aac8021cee981905a3c98f2d4e312e33b913ded157af60b9640 [2024-11-02 12:36:19,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:36:19,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:36:19,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:36:19,983 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:36:19,983 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:36:19,985 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i Unable to find full path for "g++" [2024-11-02 12:36:22,261 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:36:22,632 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:36:22,633 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-2.i [2024-11-02 12:36:22,646 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/data/1686a9aac/bed48355c04e467e8fd16a9e194f9981/FLAG64f00c79b [2024-11-02 12:36:22,857 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/data/1686a9aac/bed48355c04e467e8fd16a9e194f9981 [2024-11-02 12:36:22,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:36:22,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:36:22,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:22,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:36:22,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:36:22,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:22" (1/1) ... [2024-11-02 12:36:22,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573828d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:22, skipping insertion in model container [2024-11-02 12:36:22,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:22" (1/1) ... [2024-11-02 12:36:22,927 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:36:23,301 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-02 12:36:23,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:23,324 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:36:23,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:23,423 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:36:23,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23 WrapperNode [2024-11-02 12:36:23,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:23,438 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:23,438 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:36:23,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:36:23,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,478 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,520 INFO L138 Inliner]: procedures = 115, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2024-11-02 12:36:23,521 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:23,522 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:36:23,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:36:23,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:36:23,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,548 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,557 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,559 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:36:23,563 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:36:23,563 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:36:23,563 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:36:23,564 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (1/1) ... [2024-11-02 12:36:23,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:23,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:36:23,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:36:23,630 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2024-11-02 12:36:23,630 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2024-11-02 12:36:23,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:36:23,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:36:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:36:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:36:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:36:23,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:36:23,778 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:36:23,781 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:36:24,044 INFO L? ?]: Removed 33 outVars from TransFormulas that were not future-live. [2024-11-02 12:36:24,044 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:36:24,057 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:36:24,057 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-02 12:36:24,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:24 BoogieIcfgContainer [2024-11-02 12:36:24,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:36:24,060 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:36:24,060 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:36:24,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:36:24,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:36:22" (1/3) ... [2024-11-02 12:36:24,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f38f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:24, skipping insertion in model container [2024-11-02 12:36:24,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:23" (2/3) ... [2024-11-02 12:36:24,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f38f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:24, skipping insertion in model container [2024-11-02 12:36:24,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:24" (3/3) ... [2024-11-02 12:36:24,067 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy-2.i [2024-11-02 12:36:24,091 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:36:24,091 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-02 12:36:24,139 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:36:24,148 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=None, 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;@1bafa858, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:36:24,150 INFO L334 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-11-02 12:36:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:36:24,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:24,166 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:24,166 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-02 12:36:24,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1794625018, now seen corresponding path program 1 times [2024-11-02 12:36:24,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-02 12:36:24,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370158362] [2024-11-02 12:36:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:24,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-02 12:36:24,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/mathsat [2024-11-02 12:36:24,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-02 12:36:24,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-02 12:36:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:24,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:36:24,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:24,413 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 7 [2024-11-02 12:36:24,586 WARN L873 $PredicateComparison]: unable to prove that (exists ((|alloc_node_~temp~0#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |alloc_node_~temp~0#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2024-11-02 12:36:24,665 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-02 12:36:24,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-02 12:36:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-02 12:36:24,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:25,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-02 12:36:25,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370158362] [2024-11-02 12:36:25,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370158362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:25,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1775062548] [2024-11-02 12:36:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:25,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-02 12:36:25,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/cvc4 [2024-11-02 12:36:25,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-02 12:36:25,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-02 12:36:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:25,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:36:25,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:25,149 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 7 [2024-11-02 12:36:25,286 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-02 12:36:25,287 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 21 treesize of output 20 [2024-11-02 12:36:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:25,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:25,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1775062548] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5032417] [2024-11-02 12:36:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:25,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:25,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:25,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:36:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:25,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:36:25,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:25,685 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 7 [2024-11-02 12:36:25,797 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-02 12:36:25,797 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 21 treesize of output 20 [2024-11-02 12:36:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:25,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:26,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5032417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:26,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-02 12:36:26,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2024-11-02 12:36:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431510592] [2024-11-02 12:36:26,072 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-02 12:36:26,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:36:26,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-02 12:36:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:36:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=56, Unknown=1, NotChecked=14, Total=90 [2024-11-02 12:36:26,108 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 12:36:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:26,536 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-02 12:36:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:36:26,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2024-11-02 12:36:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:26,547 INFO L225 Difference]: With dead ends: 31 [2024-11-02 12:36:26,547 INFO L226 Difference]: Without dead ends: 28 [2024-11-02 12:36:26,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-11-02 12:36:26,553 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:26,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2024-11-02 12:36:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-02 12:36:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-02 12:36:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2024-11-02 12:36:26,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 16 [2024-11-02 12:36:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:26,597 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2024-11-02 12:36:26,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 12:36:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2024-11-02 12:36:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:36:26,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:26,599 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:26,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-02 12:36:26,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:36:27,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:36:27,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/cvc4 --incremental --print-success --lang smt [2024-11-02 12:36:27,202 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-02 12:36:27,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1794625017, now seen corresponding path program 1 times [2024-11-02 12:36:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-02 12:36:27,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256745989] [2024-11-02 12:36:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:27,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-02 12:36:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/mathsat [2024-11-02 12:36:27,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-02 12:36:27,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-02 12:36:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:27,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-02 12:36:27,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:27,275 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 7 [2024-11-02 12:36:27,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 12:36:27,477 WARN L873 $PredicateComparison]: unable to prove that (exists ((|alloc_node_~temp~0#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |alloc_node_~temp~0#1.base|)) (= (store |c_old(#length)| |alloc_node_~temp~0#1.base| (select |c_#length| |alloc_node_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-02 12:36:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:36:27,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-02 12:36:27,547 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-02 12:36:27,547 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 13 treesize of output 13 [2024-11-02 12:36:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-02 12:36:27,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:27,826 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-02 12:36:27,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256745989] [2024-11-02 12:36:27,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256745989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:27,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101564357] [2024-11-02 12:36:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:27,827 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-02 12:36:27,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/cvc4 [2024-11-02 12:36:27,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-02 12:36:27,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-02 12:36:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:27,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-02 12:36:27,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:27,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 12:36:27,977 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 7 [2024-11-02 12:36:28,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:36:28,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-02 12:36:28,171 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-02 12:36:28,172 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 13 treesize of output 13 [2024-11-02 12:36:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-02 12:36:28,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1101564357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:30,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981686733] [2024-11-02 12:36:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:30,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:30,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:30,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:30,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a891b96-a35c-448a-97ef-a4bd9b45a46a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:36:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:30,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-02 12:36:30,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:30,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 12:36:30,469 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 7 [2024-11-02 12:36:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:36:30,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-02 12:36:30,698 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-02 12:36:30,699 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 13 treesize of output 13 [2024-11-02 12:36:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-02 12:36:30,712 INFO L311 TraceCheckSpWp]: Computing backward predicates...