./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:08:24,197 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:08:24,283 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:08:24,290 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:08:24,291 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:08:24,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:08:24,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:08:24,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:08:24,328 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:08:24,329 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:08:24,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:08:24,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:08:24,330 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:08:24,331 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:08:24,331 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:08:24,331 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:08:24,331 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:08:24,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:08:24,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:08:24,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:08:24,331 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:08:24,332 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:08:24,332 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:08:24,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:08:24,332 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:08:24,332 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:08:24,333 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:08:24,333 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:08:24,333 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:08:24,333 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:08:24,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:24,333 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:24,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:24,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:24,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:08:24,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:24,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:24,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:24,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:24,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:08:24,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:08:24,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:08:24,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:08:24,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:08:24,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:08:24,335 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:08:24,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:08:24,336 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB 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 -> Automizer 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 -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2024-11-27 20:08:24,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:08:24,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:08:24,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:08:24,690 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:08:24,691 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:08:24,693 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-27 20:08:27,892 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data/37f48675c/3a9c329d099a4daabbb9a8eebec0dbec/FLAGdfdb83a74 [2024-11-27 20:08:28,220 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:08:28,220 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-27 20:08:28,236 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data/37f48675c/3a9c329d099a4daabbb9a8eebec0dbec/FLAGdfdb83a74 [2024-11-27 20:08:28,252 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data/37f48675c/3a9c329d099a4daabbb9a8eebec0dbec [2024-11-27 20:08:28,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:08:28,260 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:08:28,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:28,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:08:28,268 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:08:28,269 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbfc6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28, skipping insertion in model container [2024-11-27 20:08:28,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,318 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:08:28,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:28,633 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:08:28,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:28,702 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:08:28,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28 WrapperNode [2024-11-27 20:08:28,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:28,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:28,705 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:08:28,705 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:08:28,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,740 INFO L138 Inliner]: procedures = 127, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 107 [2024-11-27 20:08:28,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:28,741 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:08:28,741 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:08:28,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:08:28,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,754 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,775 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 7, 5]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-11-27 20:08:28,775 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,788 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,792 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,794 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,795 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,798 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:08:28,799 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:08:28,799 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:08:28,799 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:08:28,800 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (1/1) ... [2024-11-27 20:08:28,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:28,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:28,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:08:28,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:08:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:08:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:08:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 20:08:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:08:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:08:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 20:08:28,873 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-27 20:08:28,874 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-27 20:08:28,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:08:28,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:08:28,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 20:08:28,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-27 20:08:28,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-27 20:08:28,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-27 20:08:28,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-27 20:08:28,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-27 20:08:28,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-27 20:08:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 20:08:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-27 20:08:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-27 20:08:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-27 20:08:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:08:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:08:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 20:08:28,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:08:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:08:29,025 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:08:29,027 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:08:29,392 INFO L? ?]: Removed 82 outVars from TransFormulas that were not future-live. [2024-11-27 20:08:29,392 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:08:29,408 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:08:29,408 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 20:08:29,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:29 BoogieIcfgContainer [2024-11-27 20:08:29,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:08:29,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:08:29,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:08:29,420 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:08:29,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:08:28" (1/3) ... [2024-11-27 20:08:29,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca68a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:29, skipping insertion in model container [2024-11-27 20:08:29,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:28" (2/3) ... [2024-11-27 20:08:29,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca68a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:29, skipping insertion in model container [2024-11-27 20:08:29,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:29" (3/3) ... [2024-11-27 20:08:29,422 INFO L128 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2024-11-27 20:08:29,436 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:08:29,438 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_prepend_equal.i that has 2 procedures, 75 locations, 1 initial locations, 3 loop locations, and 27 error locations. [2024-11-27 20:08:29,495 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:08:29,510 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=PETRI_NET, 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;@21d59ec6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:08:29,510 INFO L334 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2024-11-27 20:08:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 71 states have internal predecessors, (81), 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) [2024-11-27 20:08:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:08:29,524 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:29,524 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:29,525 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:29,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1811442039, now seen corresponding path program 1 times [2024-11-27 20:08:29,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:29,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359148111] [2024-11-27 20:08:29,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:29,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:29,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:29,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359148111] [2024-11-27 20:08:29,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359148111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:29,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:29,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:08:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808644338] [2024-11-27 20:08:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:29,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:29,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:29,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:29,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:29,931 INFO L87 Difference]: Start difference. First operand has 75 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 71 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:30,064 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-11-27 20:08:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-27 20:08:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:30,073 INFO L225 Difference]: With dead ends: 72 [2024-11-27 20:08:30,074 INFO L226 Difference]: Without dead ends: 69 [2024-11-27 20:08:30,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:30,081 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:30,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 114 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-27 20:08:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-27 20:08:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 65 states have internal predecessors, (69), 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) [2024-11-27 20:08:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2024-11-27 20:08:30,131 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 7 [2024-11-27 20:08:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:30,132 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2024-11-27 20:08:30,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2024-11-27 20:08:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:08:30,133 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:30,133 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:30,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:08:30,134 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:30,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1811442040, now seen corresponding path program 1 times [2024-11-27 20:08:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:30,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170504468] [2024-11-27 20:08:30,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:30,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:30,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:30,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170504468] [2024-11-27 20:08:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170504468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:30,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:08:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186518915] [2024-11-27 20:08:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:30,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:30,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:30,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:30,329 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:30,408 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-11-27 20:08:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:30,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-27 20:08:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:30,411 INFO L225 Difference]: With dead ends: 67 [2024-11-27 20:08:30,411 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 20:08:30,411 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:30,412 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:30,412 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 113 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 20:08:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 20:08:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 63 states have internal predecessors, (67), 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) [2024-11-27 20:08:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-27 20:08:30,423 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 7 [2024-11-27 20:08:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:30,423 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-27 20:08:30,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-27 20:08:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 20:08:30,424 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:30,424 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:30,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:08:30,424 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:30,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1027058655, now seen corresponding path program 1 times [2024-11-27 20:08:30,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:30,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214755707] [2024-11-27 20:08:30,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:30,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214755707] [2024-11-27 20:08:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214755707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:30,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:08:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542158818] [2024-11-27 20:08:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:30,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:08:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:30,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:08:30,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:08:30,833 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:31,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:31,038 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2024-11-27 20:08:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:08:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-27 20:08:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:31,040 INFO L225 Difference]: With dead ends: 66 [2024-11-27 20:08:31,040 INFO L226 Difference]: Without dead ends: 66 [2024-11-27 20:08:31,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:08:31,041 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:31,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 223 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-27 20:08:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-27 20:08:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 62 states have internal predecessors, (66), 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) [2024-11-27 20:08:31,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-27 20:08:31,052 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 13 [2024-11-27 20:08:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:31,054 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-27 20:08:31,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-27 20:08:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 20:08:31,055 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:31,055 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:31,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:08:31,056 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:31,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1027058654, now seen corresponding path program 1 times [2024-11-27 20:08:31,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:31,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404215070] [2024-11-27 20:08:31,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:31,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:31,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404215070] [2024-11-27 20:08:31,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404215070] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:31,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:31,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:08:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441204206] [2024-11-27 20:08:31,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:31,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:08:31,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:31,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:08:31,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:08:31,231 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:31,400 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2024-11-27 20:08:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:08:31,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-27 20:08:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:31,401 INFO L225 Difference]: With dead ends: 65 [2024-11-27 20:08:31,401 INFO L226 Difference]: Without dead ends: 65 [2024-11-27 20:08:31,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:08:31,402 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:31,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 207 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-27 20:08:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-27 20:08:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 61 states have internal predecessors, (65), 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) [2024-11-27 20:08:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2024-11-27 20:08:31,411 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 13 [2024-11-27 20:08:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:31,412 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2024-11-27 20:08:31,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2024-11-27 20:08:31,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-27 20:08:31,413 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:31,413 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:31,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:08:31,414 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:31,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2047983870, now seen corresponding path program 1 times [2024-11-27 20:08:31,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:31,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531739951] [2024-11-27 20:08:31,414 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:31,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:31,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:31,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531739951] [2024-11-27 20:08:31,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531739951] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:31,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:31,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:08:31,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141496036] [2024-11-27 20:08:31,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:31,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:08:31,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:31,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:08:31,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:31,515 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:31,536 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-11-27 20:08:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:08:31,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-27 20:08:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:31,541 INFO L225 Difference]: With dead ends: 70 [2024-11-27 20:08:31,541 INFO L226 Difference]: Without dead ends: 70 [2024-11-27 20:08:31,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:08:31,544 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:31,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:08:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-27 20:08:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-11-27 20:08:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 62 states have internal predecessors, (66), 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) [2024-11-27 20:08:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-27 20:08:31,556 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 15 [2024-11-27 20:08:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:31,559 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-27 20:08:31,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:31,559 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-27 20:08:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 20:08:31,560 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:31,560 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:31,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:08:31,561 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:31,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:31,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1404458641, now seen corresponding path program 1 times [2024-11-27 20:08:31,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:31,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717671581] [2024-11-27 20:08:31,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:31,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 20:08:31,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:31,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717671581] [2024-11-27 20:08:31,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717671581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:31,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654396816] [2024-11-27 20:08:31,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:31,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:31,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:31,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:08:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:31,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:08:31,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:31,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 20:08:32,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654396816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:32,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:32,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-27 20:08:32,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209650040] [2024-11-27 20:08:32,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:32,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:08:32,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:32,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:08:32,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:08:32,031 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 20:08:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:32,056 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-11-27 20:08:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:08:32,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2024-11-27 20:08:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:32,057 INFO L225 Difference]: With dead ends: 71 [2024-11-27 20:08:32,058 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 20:08:32,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:08:32,061 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:32,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 132 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:08:32,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 20:08:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-27 20:08:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2024-11-27 20:08:32,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 27 [2024-11-27 20:08:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:32,069 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2024-11-27 20:08:32,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 20:08:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2024-11-27 20:08:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 20:08:32,070 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:32,070 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:32,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:08:32,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:32,271 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:32,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1237020768, now seen corresponding path program 2 times [2024-11-27 20:08:32,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:32,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781440025] [2024-11-27 20:08:32,272 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:32,334 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:32,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:08:33,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:33,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781440025] [2024-11-27 20:08:33,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781440025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:33,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757495703] [2024-11-27 20:08:33,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:33,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:33,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:33,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:33,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:08:33,364 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:33,364 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:33,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 20:08:33,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:33,400 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 [2024-11-27 20:08:33,424 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-27 20:08:33,491 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-27 20:08:33,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-27 20:08:33,578 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-27 20:08:33,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-27 20:08:33,698 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-27 20:08:33,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-27 20:08:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 4 not checked. [2024-11-27 20:08:33,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:08:34,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757495703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:34,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:34,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 5] total 15 [2024-11-27 20:08:34,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107154358] [2024-11-27 20:08:34,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:34,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:08:34,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:34,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:08:34,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=160, Unknown=1, NotChecked=26, Total=240 [2024-11-27 20:08:34,361 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-27 20:08:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:34,709 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2024-11-27 20:08:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:08:34,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 39 [2024-11-27 20:08:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:34,710 INFO L225 Difference]: With dead ends: 79 [2024-11-27 20:08:34,710 INFO L226 Difference]: Without dead ends: 79 [2024-11-27 20:08:34,711 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=232, Unknown=1, NotChecked=32, Total=342 [2024-11-27 20:08:34,711 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 91 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:34,712 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 218 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 230 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2024-11-27 20:08:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-27 20:08:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2024-11-27 20:08:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.434782608695652) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-11-27 20:08:34,716 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 39 [2024-11-27 20:08:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:34,716 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-11-27 20:08:34,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-27 20:08:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-11-27 20:08:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 20:08:34,717 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:34,718 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:34,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:34,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 20:08:34,922 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:34,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:34,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1237020767, now seen corresponding path program 1 times [2024-11-27 20:08:34,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:34,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135059059] [2024-11-27 20:08:34,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:34,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:08:35,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:35,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135059059] [2024-11-27 20:08:35,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135059059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:35,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368423387] [2024-11-27 20:08:35,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:35,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:35,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:35,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:08:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:35,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 20:08:35,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:35,993 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 [2024-11-27 20:08:36,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:08:36,024 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-27 20:08:36,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:08:36,079 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 [2024-11-27 20:08:36,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:08:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:08:36,184 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 [2024-11-27 20:08:36,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:08:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:08:36,327 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 [2024-11-27 20:08:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-27 20:08:36,335 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:08:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368423387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:36,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:08:36,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 15 [2024-11-27 20:08:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022701242] [2024-11-27 20:08:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:36,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:08:36,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:36,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:08:36,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2024-11-27 20:08:36,337 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:36,437 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-11-27 20:08:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:08:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2024-11-27 20:08:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:36,438 INFO L225 Difference]: With dead ends: 65 [2024-11-27 20:08:36,438 INFO L226 Difference]: Without dead ends: 65 [2024-11-27 20:08:36,439 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-11-27 20:08:36,439 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:36,440 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 148 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2024-11-27 20:08:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-27 20:08:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-27 20:08:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.391304347826087) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-11-27 20:08:36,455 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 39 [2024-11-27 20:08:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:36,455 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-11-27 20:08:36,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-11-27 20:08:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 20:08:36,456 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:36,456 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:36,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:36,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:36,657 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:36,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash 307061855, now seen corresponding path program 1 times [2024-11-27 20:08:36,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:36,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357151697] [2024-11-27 20:08:36,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:36,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:08:36,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357151697] [2024-11-27 20:08:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357151697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:36,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:36,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:08:36,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507459462] [2024-11-27 20:08:36,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:36,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:08:36,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:36,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:08:36,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:08:36,785 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2024-11-27 20:08:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:36,884 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-11-27 20:08:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:08:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 40 [2024-11-27 20:08:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:36,885 INFO L225 Difference]: With dead ends: 64 [2024-11-27 20:08:36,885 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 20:08:36,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:08:36,885 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 3 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:36,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 187 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 20:08:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-27 20:08:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2024-11-27 20:08:36,889 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 40 [2024-11-27 20:08:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:36,890 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2024-11-27 20:08:36,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2024-11-27 20:08:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2024-11-27 20:08:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 20:08:36,891 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:36,891 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:36,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 20:08:36,891 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:36,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:36,891 INFO L85 PathProgramCache]: Analyzing trace with hash 307061856, now seen corresponding path program 1 times [2024-11-27 20:08:36,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:36,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091957198] [2024-11-27 20:08:36,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:36,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:08:37,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091957198] [2024-11-27 20:08:37,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091957198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:37,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:37,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:08:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260072255] [2024-11-27 20:08:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:37,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:08:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:37,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:08:37,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:08:37,122 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2024-11-27 20:08:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:37,236 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-11-27 20:08:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:08:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 40 [2024-11-27 20:08:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:37,237 INFO L225 Difference]: With dead ends: 63 [2024-11-27 20:08:37,237 INFO L226 Difference]: Without dead ends: 63 [2024-11-27 20:08:37,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:08:37,238 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 3 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:37,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 247 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-27 20:08:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-27 20:08:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-11-27 20:08:37,246 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 40 [2024-11-27 20:08:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:37,246 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-11-27 20:08:37,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2024-11-27 20:08:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-11-27 20:08:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 20:08:37,251 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:37,251 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:37,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 20:08:37,251 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:37,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1439231550, now seen corresponding path program 1 times [2024-11-27 20:08:37,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:37,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650577454] [2024-11-27 20:08:37,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:37,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-27 20:08:37,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:37,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650577454] [2024-11-27 20:08:37,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650577454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:37,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:37,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:08:37,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188763374] [2024-11-27 20:08:37,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:37,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:08:37,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:37,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:08:37,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:08:37,581 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 7 states, 5 states have (on average 4.4) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:37,653 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-11-27 20:08:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:08:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2024-11-27 20:08:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:37,655 INFO L225 Difference]: With dead ends: 61 [2024-11-27 20:08:37,655 INFO L226 Difference]: Without dead ends: 61 [2024-11-27 20:08:37,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:08:37,656 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 41 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:37,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 115 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:08:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-27 20:08:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-27 20:08:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-11-27 20:08:37,662 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 44 [2024-11-27 20:08:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:37,662 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-11-27 20:08:37,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-11-27 20:08:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-27 20:08:37,665 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:37,665 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:37,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 20:08:37,665 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:37,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash 511391246, now seen corresponding path program 1 times [2024-11-27 20:08:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:37,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144836649] [2024-11-27 20:08:37,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:08:38,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:38,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144836649] [2024-11-27 20:08:38,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144836649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:38,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:38,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 20:08:38,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827459334] [2024-11-27 20:08:38,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:38,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:08:38,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:38,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:08:38,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:08:38,031 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:38,256 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-11-27 20:08:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:08:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2024-11-27 20:08:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:38,258 INFO L225 Difference]: With dead ends: 62 [2024-11-27 20:08:38,258 INFO L226 Difference]: Without dead ends: 62 [2024-11-27 20:08:38,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:08:38,258 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:38,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 252 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-27 20:08:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-27 20:08:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.3125) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-11-27 20:08:38,266 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 47 [2024-11-27 20:08:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:38,266 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-11-27 20:08:38,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-11-27 20:08:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-27 20:08:38,267 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:38,267 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:38,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-27 20:08:38,267 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:38,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash 511391247, now seen corresponding path program 1 times [2024-11-27 20:08:38,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:38,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781358581] [2024-11-27 20:08:38,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:08:38,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:38,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781358581] [2024-11-27 20:08:38,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781358581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:38,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:38,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 20:08:38,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050547180] [2024-11-27 20:08:38,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:38,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:08:38,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:38,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:08:38,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:08:38,841 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:39,054 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2024-11-27 20:08:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:08:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2024-11-27 20:08:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:39,055 INFO L225 Difference]: With dead ends: 64 [2024-11-27 20:08:39,055 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 20:08:39,056 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:08:39,056 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:39,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 285 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 20:08:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-27 20:08:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.28) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2024-11-27 20:08:39,060 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 47 [2024-11-27 20:08:39,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:39,060 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2024-11-27 20:08:39,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2024-11-27 20:08:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 20:08:39,061 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:39,061 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:39,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 20:08:39,061 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:39,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash 610032840, now seen corresponding path program 1 times [2024-11-27 20:08:39,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:39,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692233457] [2024-11-27 20:08:39,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:08:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692233457] [2024-11-27 20:08:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692233457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:39,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:39,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 20:08:39,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432454119] [2024-11-27 20:08:39,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:39,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:08:39,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:39,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:08:39,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:08:39,424 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:39,540 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-11-27 20:08:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:08:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2024-11-27 20:08:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:39,541 INFO L225 Difference]: With dead ends: 64 [2024-11-27 20:08:39,542 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 20:08:39,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:08:39,542 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:39,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 277 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:39,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 20:08:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-27 20:08:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.26) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2024-11-27 20:08:39,548 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 50 [2024-11-27 20:08:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:39,549 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2024-11-27 20:08:39,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2024-11-27 20:08:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:08:39,549 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:39,549 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:39,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 20:08:39,554 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:08:39,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash -178753963, now seen corresponding path program 1 times [2024-11-27 20:08:39,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034081844] [2024-11-27 20:08:39,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:39,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:08:40,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:40,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034081844] [2024-11-27 20:08:40,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034081844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:40,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513456639] [2024-11-27 20:08:40,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:40,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:40,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:08:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:41,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-27 20:08:41,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:41,237 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 [2024-11-27 20:08:41,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:08:41,614 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-27 20:08:41,614 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 18 treesize of output 21 [2024-11-27 20:08:41,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:08:42,092 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:08:42,093 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:08:42,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-11-27 20:08:42,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:08:42,292 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:08:42,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-27 20:08:42,299 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:08:42,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:08:42,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-27 20:08:42,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:08:42,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-27 20:08:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:08:42,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:43,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-27 20:09:28,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2024-11-27 20:09:28,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 52 [2024-11-27 20:09:28,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2024-11-27 20:09:29,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513456639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:29,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:09:29,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2024-11-27 20:09:29,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575913199] [2024-11-27 20:09:29,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:29,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-27 20:09:29,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:29,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-27 20:09:29,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2289, Unknown=9, NotChecked=0, Total=2450 [2024-11-27 20:09:29,161 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 40 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:09:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:30,962 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2024-11-27 20:09:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 20:09:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2024-11-27 20:09:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:30,963 INFO L225 Difference]: With dead ends: 71 [2024-11-27 20:09:30,963 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 20:09:30,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=280, Invalid=3617, Unknown=9, NotChecked=0, Total=3906 [2024-11-27 20:09:30,966 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:30,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 668 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 20:09:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 20:09:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2024-11-27 20:09:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:09:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2024-11-27 20:09:30,969 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 52 [2024-11-27 20:09:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:30,969 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2024-11-27 20:09:30,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:09:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2024-11-27 20:09:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:09:30,970 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:30,970 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:30,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:31,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:31,171 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:09:31,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash -178753962, now seen corresponding path program 1 times [2024-11-27 20:09:31,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:31,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146553665] [2024-11-27 20:09:31,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:31,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:09:32,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:32,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146553665] [2024-11-27 20:09:32,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146553665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:32,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493670889] [2024-11-27 20:09:32,998 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:32,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:33,000 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:33,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:09:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:33,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-27 20:09:33,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:33,260 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 [2024-11-27 20:09:33,266 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 [2024-11-27 20:09:33,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:09:33,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:09:33,921 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-27 20:09:33,921 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 18 treesize of output 21 [2024-11-27 20:09:33,956 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-27 20:09:33,956 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 15 treesize of output 15 [2024-11-27 20:09:34,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-27 20:09:34,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-27 20:09:34,569 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:09:34,597 INFO L349 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2024-11-27 20:09:34,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2024-11-27 20:09:34,606 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:09:34,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 31 [2024-11-27 20:09:34,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2024-11-27 20:09:34,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2024-11-27 20:09:34,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-27 20:09:34,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:09:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:09:34,972 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:35,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 76 [2024-11-27 20:09:35,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:09:35,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 128 [2024-11-27 20:09:35,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:09:35,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 130 [2024-11-27 20:09:36,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493670889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:36,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:09:36,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2024-11-27 20:09:36,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097716711] [2024-11-27 20:09:36,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:36,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-27 20:09:36,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:36,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-27 20:09:36,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2407, Unknown=0, NotChecked=0, Total=2550 [2024-11-27 20:09:36,152 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 41 states, 38 states have (on average 2.026315789473684) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:09:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:38,284 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2024-11-27 20:09:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 20:09:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.026315789473684) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2024-11-27 20:09:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:38,285 INFO L225 Difference]: With dead ends: 80 [2024-11-27 20:09:38,285 INFO L226 Difference]: Without dead ends: 80 [2024-11-27 20:09:38,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=278, Invalid=4144, Unknown=0, NotChecked=0, Total=4422 [2024-11-27 20:09:38,287 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 107 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:38,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 791 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 20:09:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-27 20:09:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2024-11-27 20:09:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 70 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:09:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2024-11-27 20:09:38,292 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 52 [2024-11-27 20:09:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:38,292 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2024-11-27 20:09:38,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.026315789473684) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:09:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2024-11-27 20:09:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:09:38,294 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:38,294 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:38,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:09:38,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 20:09:38,495 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:09:38,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1246413450, now seen corresponding path program 1 times [2024-11-27 20:09:38,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:38,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326564298] [2024-11-27 20:09:38,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:09:39,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:39,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326564298] [2024-11-27 20:09:39,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326564298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:39,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:39,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-27 20:09:39,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102055710] [2024-11-27 20:09:39,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:39,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:09:39,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:39,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:09:39,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:09:39,111 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:09:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:39,350 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2024-11-27 20:09:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:09:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2024-11-27 20:09:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:39,351 INFO L225 Difference]: With dead ends: 80 [2024-11-27 20:09:39,351 INFO L226 Difference]: Without dead ends: 80 [2024-11-27 20:09:39,352 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:09:39,352 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:39,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 388 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:09:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-27 20:09:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2024-11-27 20:09:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:09:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2024-11-27 20:09:39,359 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 53 [2024-11-27 20:09:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:39,359 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2024-11-27 20:09:39,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:09:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2024-11-27 20:09:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-27 20:09:39,360 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:39,360 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:39,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-27 20:09:39,360 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:09:39,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:39,361 INFO L85 PathProgramCache]: Analyzing trace with hash 502557473, now seen corresponding path program 1 times [2024-11-27 20:09:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:39,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482032169] [2024-11-27 20:09:39,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:40,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:40,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482032169] [2024-11-27 20:09:40,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482032169] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:40,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373390438] [2024-11-27 20:09:40,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:40,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:40,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:40,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:09:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:40,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-27 20:09:40,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:40,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-27 20:09:41,007 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:09:41,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2024-11-27 20:09:41,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:09:41,090 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:09:41,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2024-11-27 20:09:41,095 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:09:41,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:09:41,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2024-11-27 20:09:41,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-27 20:09:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:09:41,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:41,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2024-11-27 20:09:41,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2024-11-27 20:09:41,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:09:41,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2024-11-27 20:09:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:09:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373390438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:41,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:41,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 18] total 43 [2024-11-27 20:09:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106547430] [2024-11-27 20:09:41,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:41,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-27 20:09:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:41,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-27 20:09:41,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2024-11-27 20:09:41,788 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 43 states, 42 states have (on average 2.142857142857143) internal successors, (90), 39 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-27 20:09:45,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:09:49,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:09:53,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:09:58,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:10:02,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:10:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:03,268 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2024-11-27 20:10:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 20:10:03,269 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.142857142857143) internal successors, (90), 39 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 55 [2024-11-27 20:10:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:03,269 INFO L225 Difference]: With dead ends: 76 [2024-11-27 20:10:03,269 INFO L226 Difference]: Without dead ends: 76 [2024-11-27 20:10:03,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=302, Invalid=3480, Unknown=0, NotChecked=0, Total=3782 [2024-11-27 20:10:03,271 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 66 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:03,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1142 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 937 Invalid, 5 Unknown, 0 Unchecked, 20.6s Time] [2024-11-27 20:10:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-27 20:10:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-27 20:10:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:10:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-11-27 20:10:03,274 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 55 [2024-11-27 20:10:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:03,274 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-11-27 20:10:03,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.142857142857143) internal successors, (90), 39 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-27 20:10:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-11-27 20:10:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 20:10:03,275 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:03,275 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:03,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:03,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 20:10:03,479 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:03,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash -383366546, now seen corresponding path program 2 times [2024-11-27 20:10:03,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:03,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804119580] [2024-11-27 20:10:03,480 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:03,533 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:03,534 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:06,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:06,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804119580] [2024-11-27 20:10:06,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804119580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:06,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774977037] [2024-11-27 20:10:06,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:06,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:06,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:06,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:06,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:10:06,387 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:06,387 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:06,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-27 20:10:06,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:06,442 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 [2024-11-27 20:10:06,721 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 20:10:06,722 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 [2024-11-27 20:10:06,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:10:07,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2024-11-27 20:10:07,194 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 20:10:07,194 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 15 treesize of output 7 [2024-11-27 20:10:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:10:07,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-27 20:10:07,824 INFO L349 Elim1Store]: treesize reduction 96, result has 30.9 percent of original size [2024-11-27 20:10:07,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2024-11-27 20:10:08,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:10:08,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 32 [2024-11-27 20:10:08,712 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:10:08,713 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:10:08,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 38 [2024-11-27 20:10:08,721 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:10:08,759 INFO L349 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2024-11-27 20:10:08,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2024-11-27 20:10:09,074 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:10:09,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 50 [2024-11-27 20:10:09,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:10:09,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-11-27 20:10:10,010 INFO L349 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2024-11-27 20:10:10,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2024-11-27 20:10:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:10,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:12,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 48 [2024-11-27 20:10:13,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:10:13,844 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 79 [2024-11-27 20:10:14,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774977037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:14,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:10:14,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36] total 66 [2024-11-27 20:10:14,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108047292] [2024-11-27 20:10:14,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:14,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-27 20:10:14,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:14,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-27 20:10:14,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=6217, Unknown=0, NotChecked=0, Total=6480 [2024-11-27 20:10:14,599 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 67 states, 64 states have (on average 1.484375) internal successors, (95), 58 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:10:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:19,964 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2024-11-27 20:10:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-27 20:10:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 64 states have (on average 1.484375) internal successors, (95), 58 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2024-11-27 20:10:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:19,966 INFO L225 Difference]: With dead ends: 86 [2024-11-27 20:10:19,966 INFO L226 Difference]: Without dead ends: 86 [2024-11-27 20:10:19,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=582, Invalid=11190, Unknown=0, NotChecked=0, Total=11772 [2024-11-27 20:10:19,969 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 100 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:19,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1000 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-27 20:10:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-27 20:10:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2024-11-27 20:10:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.25) internal successors, (80), 73 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:10:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2024-11-27 20:10:19,972 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 57 [2024-11-27 20:10:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:19,972 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2024-11-27 20:10:19,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 64 states have (on average 1.484375) internal successors, (95), 58 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:10:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2024-11-27 20:10:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 20:10:19,973 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:19,973 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:19,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:10:20,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:20,174 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:20,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash -383366545, now seen corresponding path program 2 times [2024-11-27 20:10:20,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:20,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352130465] [2024-11-27 20:10:20,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:20,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:20,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:20,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:25,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:25,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352130465] [2024-11-27 20:10:25,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352130465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:25,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025757463] [2024-11-27 20:10:25,098 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:25,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:25,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:25,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:25,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:10:25,339 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:25,339 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:25,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-11-27 20:10:25,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:25,943 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 20:10:25,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 20:10:25,953 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 [2024-11-27 20:10:26,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:10:26,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:10:26,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-27 20:10:26,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:10:26,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:10:26,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-27 20:10:27,331 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-27 20:10:27,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2024-11-27 20:10:27,371 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-27 20:10:27,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 35 [2024-11-27 20:10:27,390 INFO L349 Elim1Store]: treesize reduction 17, result has 43.3 percent of original size [2024-11-27 20:10:27,390 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 1 case distinctions, treesize of input 16 treesize of output 17 [2024-11-27 20:10:27,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-11-27 20:10:27,445 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-27 20:10:27,446 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 15 treesize of output 15 [2024-11-27 20:10:28,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-27 20:10:28,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 36 [2024-11-27 20:10:28,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 36 [2024-11-27 20:10:28,374 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2024-11-27 20:10:28,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 41 treesize of output 44 [2024-11-27 20:10:28,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 56 [2024-11-27 20:10:29,693 INFO L349 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2024-11-27 20:10:29,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 44 [2024-11-27 20:10:29,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:10:29,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2024-11-27 20:10:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:30,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:42,499 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-27 20:10:42,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-27 20:10:42,500 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-27 20:10:42,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:10:42,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:42,701 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:947) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:786) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:374) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:323) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:555) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 46 more [2024-11-27 20:10:42,707 INFO L158 Benchmark]: Toolchain (without parser) took 134447.48ms. Allocated memory was 117.4MB in the beginning and 486.5MB in the end (delta: 369.1MB). Free memory was 91.3MB in the beginning and 229.7MB in the end (delta: -138.4MB). Peak memory consumption was 233.0MB. Max. memory is 16.1GB. [2024-11-27 20:10:42,707 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory is still 73.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:10:42,707 INFO L158 Benchmark]: CACSL2BoogieTranslator took 442.80ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 73.6MB in the end (delta: 17.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:10:42,708 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.54ms. Allocated memory is still 117.4MB. Free memory was 73.6MB in the beginning and 71.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:10:42,708 INFO L158 Benchmark]: Boogie Preprocessor took 56.87ms. Allocated memory is still 117.4MB. Free memory was 71.9MB in the beginning and 69.4MB in the end (delta: 2.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:10:42,708 INFO L158 Benchmark]: RCFGBuilder took 609.71ms. Allocated memory is still 117.4MB. Free memory was 69.4MB in the beginning and 50.6MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 20:10:42,708 INFO L158 Benchmark]: TraceAbstraction took 133292.01ms. Allocated memory was 117.4MB in the beginning and 486.5MB in the end (delta: 369.1MB). Free memory was 49.9MB in the beginning and 229.7MB in the end (delta: -179.8MB). Peak memory consumption was 199.4MB. Max. memory is 16.1GB. [2024-11-27 20:10:42,710 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory is still 73.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 442.80ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 73.6MB in the end (delta: 17.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.54ms. Allocated memory is still 117.4MB. Free memory was 73.6MB in the beginning and 71.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 56.87ms. Allocated memory is still 117.4MB. Free memory was 71.9MB in the beginning and 69.4MB in the end (delta: 2.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 609.71ms. Allocated memory is still 117.4MB. Free memory was 69.4MB in the beginning and 50.6MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 133292.01ms. Allocated memory was 117.4MB in the beginning and 486.5MB in the end (delta: 369.1MB). Free memory was 49.9MB in the beginning and 229.7MB in the end (delta: -179.8MB). Peak memory consumption was 199.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:10:45,047 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:10:45,146 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-27 20:10:45,156 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:10:45,157 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:10:45,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:10:45,226 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:10:45,226 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:10:45,227 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:10:45,227 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:10:45,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:10:45,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:10:45,228 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:10:45,228 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:10:45,228 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:10:45,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:10:45,228 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:10:45,228 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:10:45,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:10:45,229 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:10:45,229 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:10:45,229 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:10:45,229 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:10:45,229 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:10:45,229 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:10:45,229 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 20:10:45,230 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 20:10:45,230 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:10:45,230 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:10:45,230 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:10:45,230 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:10:45,231 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:10:45,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:10:45,231 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:10:45,231 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:10:45,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:10:45,231 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:10:45,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:10:45,232 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:10:45,233 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:10:45,233 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB 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 -> Automizer 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 -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2024-11-27 20:10:45,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:10:45,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:10:45,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:10:45,555 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:10:45,555 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:10:45,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-27 20:10:48,457 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data/1097ab4cf/2a56167d10a64689b4d4b778378d47b5/FLAG81de9fec7 [2024-11-27 20:10:48,760 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:10:48,760 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2024-11-27 20:10:48,773 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data/1097ab4cf/2a56167d10a64689b4d4b778378d47b5/FLAG81de9fec7 [2024-11-27 20:10:49,016 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/data/1097ab4cf/2a56167d10a64689b4d4b778378d47b5 [2024-11-27 20:10:49,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:10:49,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:10:49,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:10:49,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:10:49,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:10:49,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd20400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49, skipping insertion in model container [2024-11-27 20:10:49,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,072 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:10:49,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:10:49,410 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:10:49,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:10:49,518 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:10:49,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49 WrapperNode [2024-11-27 20:10:49,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:10:49,521 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:10:49,521 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:10:49,521 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:10:49,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,555 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,587 INFO L138 Inliner]: procedures = 130, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 108 [2024-11-27 20:10:49,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:10:49,588 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:10:49,592 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:10:49,592 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:10:49,601 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,609 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,639 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 7, 5]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-11-27 20:10:49,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,656 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,660 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,664 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,673 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:10:49,677 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:10:49,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:10:49,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:10:49,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (1/1) ... [2024-11-27 20:10:49,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:10:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:49,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:10:49,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:10:49,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-27 20:10:49,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-27 20:10:49,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-27 20:10:49,762 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-27 20:10:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-27 20:10:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:10:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:10:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 20:10:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-27 20:10:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-27 20:10:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-27 20:10:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-27 20:10:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-27 20:10:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-27 20:10:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 20:10:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-27 20:10:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-27 20:10:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-27 20:10:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-27 20:10:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-27 20:10:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-27 20:10:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 20:10:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-27 20:10:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-27 20:10:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:10:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:10:49,989 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:10:49,993 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:10:50,533 INFO L? ?]: Removed 82 outVars from TransFormulas that were not future-live. [2024-11-27 20:10:50,533 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:10:50,552 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:10:50,552 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 20:10:50,553 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:10:50 BoogieIcfgContainer [2024-11-27 20:10:50,553 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:10:50,556 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:10:50,556 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:10:50,561 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:10:50,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:10:49" (1/3) ... [2024-11-27 20:10:50,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2419baf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:10:50, skipping insertion in model container [2024-11-27 20:10:50,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:49" (2/3) ... [2024-11-27 20:10:50,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2419baf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:10:50, skipping insertion in model container [2024-11-27 20:10:50,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:10:50" (3/3) ... [2024-11-27 20:10:50,566 INFO L128 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2024-11-27 20:10:50,582 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:10:50,584 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_prepend_equal.i that has 2 procedures, 75 locations, 1 initial locations, 3 loop locations, and 27 error locations. [2024-11-27 20:10:50,628 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:10:50,640 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=PETRI_NET, 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;@c56457c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:10:50,641 INFO L334 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2024-11-27 20:10:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 71 states have internal predecessors, (81), 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) [2024-11-27 20:10:50,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:10:50,651 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:50,651 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:50,652 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:50,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:50,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1811442039, now seen corresponding path program 1 times [2024-11-27 20:10:50,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:50,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849838931] [2024-11-27 20:10:50,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:50,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:50,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:50,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:10:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:50,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:10:50,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:50,884 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 [2024-11-27 20:10:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:50,922 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:50,923 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:50,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849838931] [2024-11-27 20:10:50,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849838931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:50,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:50,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:10:50,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620209600] [2024-11-27 20:10:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:50,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:10:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:50,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:10:50,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:10:50,984 INFO L87 Difference]: Start difference. First operand has 75 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 71 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:51,186 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-11-27 20:10:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:10:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-27 20:10:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:51,197 INFO L225 Difference]: With dead ends: 72 [2024-11-27 20:10:51,197 INFO L226 Difference]: Without dead ends: 69 [2024-11-27 20:10:51,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:10:51,205 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:51,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 114 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:10:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-27 20:10:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-27 20:10:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 65 states have internal predecessors, (69), 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) [2024-11-27 20:10:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2024-11-27 20:10:51,253 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 7 [2024-11-27 20:10:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:51,254 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2024-11-27 20:10:51,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2024-11-27 20:10:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:10:51,255 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:51,255 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:51,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:10:51,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:51,460 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:51,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1811442040, now seen corresponding path program 1 times [2024-11-27 20:10:51,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:51,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351606351] [2024-11-27 20:10:51,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:51,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:51,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:51,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:51,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:10:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:51,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:10:51,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:51,596 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 [2024-11-27 20:10:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:51,633 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:51,633 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351606351] [2024-11-27 20:10:51,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351606351] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:51,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:51,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:10:51,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822545436] [2024-11-27 20:10:51,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:51,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:10:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:51,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:10:51,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:10:51,638 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:51,787 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-11-27 20:10:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:10:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-27 20:10:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:51,789 INFO L225 Difference]: With dead ends: 67 [2024-11-27 20:10:51,789 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 20:10:51,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:10:51,790 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:51,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 113 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:10:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 20:10:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 20:10:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 63 states have internal predecessors, (67), 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) [2024-11-27 20:10:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-27 20:10:51,803 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 7 [2024-11-27 20:10:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:51,803 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-27 20:10:51,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-27 20:10:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 20:10:51,805 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:51,805 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:51,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:10:52,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:52,006 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:52,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1027058655, now seen corresponding path program 1 times [2024-11-27 20:10:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:52,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667132557] [2024-11-27 20:10:52,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:52,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:52,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:52,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:10:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:52,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:10:52,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:52,136 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 [2024-11-27 20:10:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:52,316 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:52,316 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:52,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667132557] [2024-11-27 20:10:52,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667132557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:52,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:52,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161690128] [2024-11-27 20:10:52,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:52,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:52,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:52,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:52,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:52,318 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:10:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:52,690 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2024-11-27 20:10:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-27 20:10:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:52,692 INFO L225 Difference]: With dead ends: 66 [2024-11-27 20:10:52,693 INFO L226 Difference]: Without dead ends: 66 [2024-11-27 20:10:52,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:52,694 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:52,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 223 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:10:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-27 20:10:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-27 20:10:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 62 states have internal predecessors, (66), 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) [2024-11-27 20:10:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-27 20:10:52,700 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 13 [2024-11-27 20:10:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:52,702 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-27 20:10:52,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:10:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-27 20:10:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 20:10:52,703 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:52,703 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:52,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:52,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:52,904 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:52,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:52,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1027058654, now seen corresponding path program 1 times [2024-11-27 20:10:52,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:52,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953120608] [2024-11-27 20:10:52,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:52,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:52,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:52,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:52,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:10:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:53,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:10:53,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:53,066 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:53,066 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953120608] [2024-11-27 20:10:53,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953120608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:53,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:53,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:53,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742550667] [2024-11-27 20:10:53,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:53,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:53,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:53,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:53,068 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:10:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:53,373 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2024-11-27 20:10:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-27 20:10:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:53,374 INFO L225 Difference]: With dead ends: 65 [2024-11-27 20:10:53,375 INFO L226 Difference]: Without dead ends: 65 [2024-11-27 20:10:53,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:53,376 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:53,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 207 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:10:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-27 20:10:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-27 20:10:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 61 states have internal predecessors, (65), 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) [2024-11-27 20:10:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2024-11-27 20:10:53,389 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 13 [2024-11-27 20:10:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:53,389 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2024-11-27 20:10:53,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:10:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2024-11-27 20:10:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-27 20:10:53,390 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:53,390 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:53,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:10:53,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:53,594 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:53,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:53,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2047983870, now seen corresponding path program 1 times [2024-11-27 20:10:53,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:53,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198638784] [2024-11-27 20:10:53,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:53,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:53,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:53,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:53,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:10:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:53,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:10:53,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:53,727 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:53,727 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:53,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198638784] [2024-11-27 20:10:53,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198638784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:53,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:53,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:10:53,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312888410] [2024-11-27 20:10:53,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:53,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:10:53,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:53,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:10:53,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:10:53,728 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:10:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:53,749 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-11-27 20:10:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:10:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-27 20:10:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:53,754 INFO L225 Difference]: With dead ends: 70 [2024-11-27 20:10:53,754 INFO L226 Difference]: Without dead ends: 70 [2024-11-27 20:10:53,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:10:53,755 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:53,755 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:10:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-27 20:10:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-11-27 20:10:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 62 states have internal predecessors, (66), 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) [2024-11-27 20:10:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-27 20:10:53,769 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 15 [2024-11-27 20:10:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:53,770 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-27 20:10:53,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:10:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-27 20:10:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 20:10:53,770 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:53,771 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:53,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:53,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:53,971 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:53,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1404458641, now seen corresponding path program 1 times [2024-11-27 20:10:53,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:53,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662627591] [2024-11-27 20:10:53,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:53,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:53,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:53,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:53,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:10:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:54,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:10:54,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:54,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 20:10:54,219 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:54,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662627591] [2024-11-27 20:10:54,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662627591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:54,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:10:54,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2024-11-27 20:10:54,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062005016] [2024-11-27 20:10:54,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:54,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:10:54,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:54,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:10:54,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:10:54,221 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 20:10:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:54,316 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2024-11-27 20:10:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:10:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2024-11-27 20:10:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:54,318 INFO L225 Difference]: With dead ends: 81 [2024-11-27 20:10:54,318 INFO L226 Difference]: Without dead ends: 81 [2024-11-27 20:10:54,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:10:54,319 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 8 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:54,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 326 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:10:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-27 20:10:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-27 20:10:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.462962962962963) internal successors, (79), 74 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:10:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2024-11-27 20:10:54,325 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 27 [2024-11-27 20:10:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:54,326 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2024-11-27 20:10:54,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 20:10:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2024-11-27 20:10:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 20:10:54,327 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:54,327 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:54,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:10:54,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:54,531 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:54,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1237020768, now seen corresponding path program 2 times [2024-11-27 20:10:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:54,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789088416] [2024-11-27 20:10:54,532 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:54,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:54,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:54,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:10:54,756 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:54,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:54,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 20:10:54,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:54,773 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 [2024-11-27 20:10:54,816 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-27 20:10:54,902 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-27 20:10:54,902 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 [2024-11-27 20:10:54,952 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (= (store |c_old(#valid)| |node_create_~temp~0#1.base| (_ bv1 1)) |c_#valid|)) is different from true [2024-11-27 20:10:54,981 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-27 20:10:54,981 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 [2024-11-27 20:10:55,071 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-27 20:10:55,071 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 [2024-11-27 20:10:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 12 not checked. [2024-11-27 20:10:55,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:10:55,747 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:55,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789088416] [2024-11-27 20:10:55,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789088416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:55,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:10:55,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2024-11-27 20:10:55,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401473368] [2024-11-27 20:10:55,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:55,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:10:55,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:55,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:10:55,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=40, Unknown=2, NotChecked=26, Total=90 [2024-11-27 20:10:55,752 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 20:10:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:56,322 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2024-11-27 20:10:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:10:56,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-11-27 20:10:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:56,324 INFO L225 Difference]: With dead ends: 89 [2024-11-27 20:10:56,324 INFO L226 Difference]: Without dead ends: 89 [2024-11-27 20:10:56,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=96, Unknown=2, NotChecked=42, Total=182 [2024-11-27 20:10:56,325 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 49 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:56,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 200 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2024-11-27 20:10:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-27 20:10:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2024-11-27 20:10:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 70 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:10:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2024-11-27 20:10:56,332 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 39 [2024-11-27 20:10:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:56,332 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2024-11-27 20:10:56,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 20:10:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2024-11-27 20:10:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 20:10:56,333 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:56,334 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:56,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:56,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:56,538 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:10:56,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:56,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1237020767, now seen corresponding path program 1 times [2024-11-27 20:10:56,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:56,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942180555] [2024-11-27 20:10:56,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:56,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:56,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:56,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:56,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:10:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:56,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 20:10:56,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:56,720 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 [2024-11-27 20:10:56,727 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 [2024-11-27 20:10:56,960 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 20:10:56,961 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 [2024-11-27 20:10:57,001 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-27 20:10:57,001 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 27 [2024-11-27 20:10:57,228 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (_ bv8 32)) |c_#length|))) is different from true [2024-11-27 20:10:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:10:57,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2024-11-27 20:10:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:10:57,354 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-27 20:10:57,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-27 20:10:57,851 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-27 20:10:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:10:57,970 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2024-11-27 20:10:57,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 21 [2024-11-27 20:10:58,005 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2024-11-27 20:10:58,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-27 20:10:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 18 not checked. [2024-11-27 20:10:58,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:58,295 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:58,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942180555] [2024-11-27 20:10:58,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942180555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:58,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305271118] [2024-11-27 20:10:58,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:58,295 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:10:58,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:10:58,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:10:58,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-27 20:10:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:58,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 20:10:58,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:58,725 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 [2024-11-27 20:10:58,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:10:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:10:58,996 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 [2024-11-27 20:10:59,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:10:59,208 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (not (= (_ bv0 32) (bvadd |c_#StackHeapBarrier| (_ bv1 32)))) (not (= |c_#StackHeapBarrier| (_ bv0 32)))) is different from true [2024-11-27 20:10:59,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:10:59,315 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 [2024-11-27 20:10:59,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:10:59,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:10:59,627 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 [2024-11-27 20:10:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 12 not checked. [2024-11-27 20:10:59,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:59,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [305271118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:59,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:10:59,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2024-11-27 20:10:59,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205978674] [2024-11-27 20:10:59,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:59,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 20:10:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:59,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 20:10:59,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=366, Unknown=3, NotChecked=120, Total=552 [2024-11-27 20:10:59,947 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:11:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:11:04,090 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2024-11-27 20:11:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:11:04,091 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2024-11-27 20:11:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:11:04,092 INFO L225 Difference]: With dead ends: 74 [2024-11-27 20:11:04,092 INFO L226 Difference]: Without dead ends: 74 [2024-11-27 20:11:04,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=140, Invalid=799, Unknown=3, NotChecked=180, Total=1122 [2024-11-27 20:11:04,094 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 72 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:11:04,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 336 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 384 Invalid, 1 Unknown, 198 Unchecked, 1.9s Time] [2024-11-27 20:11:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-27 20:11:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-27 20:11:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 66 states have internal predecessors, (71), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:11:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2024-11-27 20:11:04,100 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 39 [2024-11-27 20:11:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:11:04,101 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2024-11-27 20:11:04,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:11:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2024-11-27 20:11:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 20:11:04,102 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:11:04,102 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:04,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-27 20:11:04,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:11:04,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:04,503 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:11:04,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash 307061855, now seen corresponding path program 1 times [2024-11-27 20:11:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:04,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047257253] [2024-11-27 20:11:04,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:04,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:04,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:04,506 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:04,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:11:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:04,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:11:04,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:04,659 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 [2024-11-27 20:11:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:11:04,787 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:04,787 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:04,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047257253] [2024-11-27 20:11:04,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047257253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:04,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:04,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:11:04,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251412885] [2024-11-27 20:11:04,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:04,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:11:04,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:04,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:11:04,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:11:04,789 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2024-11-27 20:11:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:11:05,275 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2024-11-27 20:11:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:11:05,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 40 [2024-11-27 20:11:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:11:05,277 INFO L225 Difference]: With dead ends: 72 [2024-11-27 20:11:05,277 INFO L226 Difference]: Without dead ends: 72 [2024-11-27 20:11:05,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:11:05,278 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:11:05,278 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:11:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-27 20:11:05,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-27 20:11:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 65 states have internal predecessors, (70), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:11:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2024-11-27 20:11:05,283 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 40 [2024-11-27 20:11:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:11:05,283 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2024-11-27 20:11:05,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2024-11-27 20:11:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2024-11-27 20:11:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 20:11:05,284 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:11:05,284 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:05,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:11:05,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:05,485 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:11:05,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:05,485 INFO L85 PathProgramCache]: Analyzing trace with hash 307061856, now seen corresponding path program 1 times [2024-11-27 20:11:05,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:05,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836020821] [2024-11-27 20:11:05,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:05,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:05,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:05,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:05,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:11:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:05,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:11:05,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:05,657 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 [2024-11-27 20:11:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:11:05,841 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:05,841 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:05,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836020821] [2024-11-27 20:11:05,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836020821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:05,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:05,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:11:05,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374963193] [2024-11-27 20:11:05,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:05,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:11:05,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:05,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:11:05,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:11:05,842 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2024-11-27 20:11:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:11:06,199 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2024-11-27 20:11:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:11:06,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 40 [2024-11-27 20:11:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:11:06,201 INFO L225 Difference]: With dead ends: 71 [2024-11-27 20:11:06,201 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 20:11:06,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:11:06,201 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:11:06,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 193 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:11:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 20:11:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-27 20:11:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 64 states have internal predecessors, (69), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:11:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2024-11-27 20:11:06,207 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 40 [2024-11-27 20:11:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:11:06,207 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2024-11-27 20:11:06,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2024-11-27 20:11:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2024-11-27 20:11:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-27 20:11:06,208 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:11:06,208 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:06,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 20:11:06,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:06,409 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:11:06,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 511391246, now seen corresponding path program 1 times [2024-11-27 20:11:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:06,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224319182] [2024-11-27 20:11:06,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:06,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:06,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:06,416 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:06,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:11:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:06,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:11:06,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:06,602 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 [2024-11-27 20:11:06,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:11:06,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:11:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:11:07,043 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:07,043 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224319182] [2024-11-27 20:11:07,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224319182] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:07,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:07,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 20:11:07,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434584536] [2024-11-27 20:11:07,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:07,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:11:07,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:07,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:11:07,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:11:07,045 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:11:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:11:07,852 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-27 20:11:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:11:07,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2024-11-27 20:11:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:11:07,853 INFO L225 Difference]: With dead ends: 72 [2024-11-27 20:11:07,853 INFO L226 Difference]: Without dead ends: 72 [2024-11-27 20:11:07,853 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:11:07,854 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:11:07,854 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 227 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:11:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-27 20:11:07,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-27 20:11:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:11:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2024-11-27 20:11:07,861 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 47 [2024-11-27 20:11:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:11:07,862 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2024-11-27 20:11:07,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:11:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2024-11-27 20:11:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-27 20:11:07,863 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:11:07,863 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:07,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:11:08,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:08,067 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:11:08,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash 511391247, now seen corresponding path program 1 times [2024-11-27 20:11:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:08,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660784200] [2024-11-27 20:11:08,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:08,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:08,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:08,071 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:08,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:11:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:08,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 20:11:08,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:08,308 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 [2024-11-27 20:11:08,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:11:08,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:11:08,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 20:11:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:11:08,899 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:08,899 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660784200] [2024-11-27 20:11:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660784200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:08,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 20:11:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72461255] [2024-11-27 20:11:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:08,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:11:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:08,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:11:08,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:11:08,901 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:11:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:11:09,612 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2024-11-27 20:11:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:11:09,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2024-11-27 20:11:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:11:09,614 INFO L225 Difference]: With dead ends: 74 [2024-11-27 20:11:09,614 INFO L226 Difference]: Without dead ends: 74 [2024-11-27 20:11:09,615 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:11:09,615 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:11:09,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 227 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 20:11:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-27 20:11:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-27 20:11:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 67 states have internal predecessors, (73), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:11:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2024-11-27 20:11:09,620 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 47 [2024-11-27 20:11:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:11:09,620 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2024-11-27 20:11:09,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:11:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2024-11-27 20:11:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 20:11:09,622 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:11:09,622 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:09,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:11:09,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:09,826 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:11:09,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:09,826 INFO L85 PathProgramCache]: Analyzing trace with hash 610032840, now seen corresponding path program 1 times [2024-11-27 20:11:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:09,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301629779] [2024-11-27 20:11:09,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:09,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:09,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:09,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:09,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:11:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:09,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:11:09,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:10,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:11:10,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-27 20:11:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:11:10,347 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:10,347 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301629779] [2024-11-27 20:11:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301629779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 20:11:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107015433] [2024-11-27 20:11:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:10,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:11:10,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:10,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:11:10,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:11:10,349 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:11:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:11:10,826 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2024-11-27 20:11:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:11:10,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2024-11-27 20:11:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:11:10,828 INFO L225 Difference]: With dead ends: 74 [2024-11-27 20:11:10,828 INFO L226 Difference]: Without dead ends: 74 [2024-11-27 20:11:10,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:11:10,828 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:11:10,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 277 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:11:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-27 20:11:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-27 20:11:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 67 states have internal predecessors, (72), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:11:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2024-11-27 20:11:10,835 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 50 [2024-11-27 20:11:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:11:10,836 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2024-11-27 20:11:10,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:11:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2024-11-27 20:11:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:11:10,841 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:11:10,841 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:10,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:11:11,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:11,042 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:11:11,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:11,042 INFO L85 PathProgramCache]: Analyzing trace with hash -178753963, now seen corresponding path program 1 times [2024-11-27 20:11:11,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:11,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873636963] [2024-11-27 20:11:11,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:11,044 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:11,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:11:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:11,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-27 20:11:11,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:11,215 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 [2024-11-27 20:11:11,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:11:11,792 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-27 20:11:11,793 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 25 treesize of output 28 [2024-11-27 20:11:12,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:11:12,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2024-11-27 20:11:12,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:11:12,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-27 20:11:12,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:11:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:12,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:11:13,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2024-11-27 20:11:13,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2024-11-27 20:11:14,467 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873636963] [2024-11-27 20:11:14,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873636963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:14,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1983265986] [2024-11-27 20:11:14,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:14,468 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:11:14,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:11:14,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:11:14,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-27 20:11:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:14,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-27 20:11:14,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:14,989 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 [2024-11-27 20:11:15,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:11:24,086 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-27 20:11:24,087 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 18 treesize of output 24 [2024-11-27 20:11:24,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:11:25,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:11:25,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2024-11-27 20:11:25,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-11-27 20:11:25,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:11:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:25,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:11:25,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2024-11-27 20:11:26,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2024-11-27 20:11:31,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1983265986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:31,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:11:31,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2024-11-27 20:11:31,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899551578] [2024-11-27 20:11:31,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:11:31,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-27 20:11:31,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:31,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-27 20:11:31,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1658, Unknown=2, NotChecked=0, Total=1806 [2024-11-27 20:11:31,380 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 37 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:11:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:11:42,982 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2024-11-27 20:11:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 20:11:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2024-11-27 20:11:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:11:42,986 INFO L225 Difference]: With dead ends: 81 [2024-11-27 20:11:42,986 INFO L226 Difference]: Without dead ends: 81 [2024-11-27 20:11:42,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=231, Invalid=2521, Unknown=4, NotChecked=0, Total=2756 [2024-11-27 20:11:42,988 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:11:42,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 423 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-27 20:11:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-27 20:11:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2024-11-27 20:11:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.278688524590164) internal successors, (78), 70 states have internal predecessors, (78), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:11:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2024-11-27 20:11:42,993 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 52 [2024-11-27 20:11:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:11:42,994 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2024-11-27 20:11:42,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:11:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2024-11-27 20:11:42,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:11:42,995 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:11:42,995 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:43,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-11-27 20:11:43,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:11:43,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:43,396 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:11:43,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash -178753962, now seen corresponding path program 1 times [2024-11-27 20:11:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:43,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653495428] [2024-11-27 20:11:43,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:43,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:43,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:43,399 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:43,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:11:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:43,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-27 20:11:43,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:43,608 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 [2024-11-27 20:11:44,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:11:44,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:11:44,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:11:44,660 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 18 treesize of output 13 [2024-11-27 20:11:44,692 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-27 20:11:44,693 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 17 treesize of output 17 [2024-11-27 20:11:45,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:11:45,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:11:45,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-11-27 20:11:45,664 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-27 20:11:45,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:11:45,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-11-27 20:11:46,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 20:11:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:46,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:11:48,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 80 [2024-11-27 20:11:48,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:11:48,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 128 [2024-11-27 20:11:48,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:11:48,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 130 [2024-11-27 20:11:54,152 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse2 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse5 (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (let ((.cse3 (forall ((|v_node_create_~temp~0#1.base_57| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))))) (.cse0 (bvadd (_ bv8 32) .cse5)) (.cse1 (select .cse2 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (and (or (forall ((|v_node_create_~temp~0#1.base_57| (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_57| v_ArrVal_851) .cse1)))) (forall ((|ULTIMATE.start_sll_prepend_~new_head~1#1.base| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse2 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |ULTIMATE.start_sll_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_prepend_~new_head~1#1.base|)))) (or .cse3 (forall ((|ULTIMATE.start_sll_prepend_~new_head~1#1.base| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse2 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |ULTIMATE.start_sll_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_prepend_~new_head~1#1.base|))) (or .cse3 (forall ((|ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |ULTIMATE.start_sll_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_prepend_~new_head~1#1.offset|))) (or (bvule (bvadd (_ bv4 32) .cse5) .cse0) .cse3) (forall ((|v_node_create_~temp~0#1.base_57| (_ BitVec 32))) (or (forall ((v_ArrVal_851 (_ BitVec 32))) (let ((.cse6 (store |c_#length| |v_node_create_~temp~0#1.base_57| v_ArrVal_851))) (or (forall ((v_arrayElimCell_53 (_ BitVec 32)) (v_arrayElimCell_52 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) v_arrayElimCell_53) (select .cse6 v_arrayElimCell_52))) (bvule .cse0 (select .cse6 .cse1))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_57|))))))))) is different from false [2024-11-27 20:11:54,166 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:54,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653495428] [2024-11-27 20:11:54,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653495428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:54,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907193655] [2024-11-27 20:11:54,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:54,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:11:54,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:11:54,171 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:11:54,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-27 20:11:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:54,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-27 20:11:54,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:54,856 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 [2024-11-27 20:11:54,867 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 [2024-11-27 20:11:56,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:11:56,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:12:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:12:05,099 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 18 treesize of output 13 [2024-11-27 20:12:05,124 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-27 20:12:05,124 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 17 treesize of output 17 [2024-11-27 20:12:06,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:12:06,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:12:06,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-11-27 20:12:06,779 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 20:12:06,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:12:07,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-11-27 20:12:07,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 20:12:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:12:07,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:12:07,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 80 [2024-11-27 20:12:07,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:12:07,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 128 [2024-11-27 20:12:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:12:07,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 130 [2024-11-27 20:12:13,069 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse3 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse1 (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (let ((.cse0 (forall ((|v_node_create_~temp~0#1.base_61| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_61|))))) (.cse2 (bvadd (_ bv8 32) .cse1)) (.cse5 (select .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (and (or .cse0 (bvule (bvadd (_ bv4 32) .cse1) .cse2)) (or .cse0 (forall ((|ULTIMATE.start_sll_prepend_~new_head~1#1.base| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |ULTIMATE.start_sll_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_prepend_~new_head~1#1.base|))) (forall ((|v_node_create_~temp~0#1.base_61| (_ BitVec 32))) (or (forall ((v_ArrVal_931 (_ BitVec 32))) (let ((.cse4 (store |c_#length| |v_node_create_~temp~0#1.base_61| v_ArrVal_931))) (or (forall ((v_arrayElimCell_53 (_ BitVec 32)) (v_arrayElimCell_52 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) v_arrayElimCell_53) (select .cse4 v_arrayElimCell_52))) (bvule .cse2 (select .cse4 .cse5))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_61|))))) (or .cse0 (forall ((|ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |ULTIMATE.start_sll_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_prepend_~new_head~1#1.offset|))) (or (forall ((|ULTIMATE.start_sll_prepend_~new_head~1#1.base| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |ULTIMATE.start_sll_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_prepend_~new_head~1#1.base|))) (forall ((v_ArrVal_931 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_61| (_ BitVec 32))) (or (bvule .cse2 (select (store |c_#length| |v_node_create_~temp~0#1.base_61| v_ArrVal_931) .cse5)) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_61|)))))))))) is different from false [2024-11-27 20:12:13,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907193655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:12:13,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:12:13,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 36 [2024-11-27 20:12:13,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119291007] [2024-11-27 20:12:13,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:12:13,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-27 20:12:13,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:12:13,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-27 20:12:13,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1930, Unknown=4, NotChecked=178, Total=2256 [2024-11-27 20:12:13,080 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 37 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 31 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:12:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:12:18,210 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2024-11-27 20:12:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 20:12:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 31 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2024-11-27 20:12:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:12:18,211 INFO L225 Difference]: With dead ends: 90 [2024-11-27 20:12:18,211 INFO L226 Difference]: Without dead ends: 90 [2024-11-27 20:12:18,212 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=210, Invalid=2656, Unknown=4, NotChecked=210, Total=3080 [2024-11-27 20:12:18,212 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 103 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:12:18,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 585 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 939 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2024-11-27 20:12:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-27 20:12:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2024-11-27 20:12:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 78 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:12:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2024-11-27 20:12:18,218 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 52 [2024-11-27 20:12:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:12:18,219 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2024-11-27 20:12:18,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 31 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:12:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2024-11-27 20:12:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:12:18,223 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:12:18,223 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:12:18,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-27 20:12:18,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-27 20:12:18,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 20:12:18,624 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:12:18,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:12:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1246413450, now seen corresponding path program 1 times [2024-11-27 20:12:18,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:12:18,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745365974] [2024-11-27 20:12:18,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:12:18,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:12:18,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:12:18,626 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:12:18,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:12:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:12:18,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-27 20:12:18,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:12:18,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:12:19,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-27 20:12:19,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:12:19,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:12:19,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-27 20:12:19,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:12:19,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:12:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:12:19,521 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:12:19,522 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:12:19,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745365974] [2024-11-27 20:12:19,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745365974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:12:19,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:12:19,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-27 20:12:19,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475578030] [2024-11-27 20:12:19,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:12:19,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:12:19,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:12:19,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:12:19,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:12:19,525 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:12:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:12:20,731 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2024-11-27 20:12:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:12:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2024-11-27 20:12:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:12:20,732 INFO L225 Difference]: With dead ends: 90 [2024-11-27 20:12:20,732 INFO L226 Difference]: Without dead ends: 90 [2024-11-27 20:12:20,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:12:20,733 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:12:20,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 400 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 20:12:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-27 20:12:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2024-11-27 20:12:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 78 states have internal predecessors, (84), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:12:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2024-11-27 20:12:20,738 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 53 [2024-11-27 20:12:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:12:20,738 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2024-11-27 20:12:20,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:12:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2024-11-27 20:12:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-27 20:12:20,739 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:12:20,740 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:12:20,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 20:12:20,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:12:20,940 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:12:20,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:12:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash 502557473, now seen corresponding path program 1 times [2024-11-27 20:12:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:12:20,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596689783] [2024-11-27 20:12:20,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:12:20,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:12:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:12:20,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:12:20,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:12:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:12:21,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 20:12:21,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:12:22,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:12:22,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:12:22,390 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-11-27 20:12:22,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 47 treesize of output 47 [2024-11-27 20:12:22,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-27 20:12:22,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-27 20:12:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:12:23,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:12:23,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2024-11-27 20:12:23,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2024-11-27 20:12:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:12:24,187 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:12:24,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596689783] [2024-11-27 20:12:24,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596689783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:12:24,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:12:24,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 27 [2024-11-27 20:12:24,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584736069] [2024-11-27 20:12:24,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:12:24,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 20:12:24,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:12:24,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 20:12:24,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:12:24,189 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:12:29,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:12:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:12:31,767 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2024-11-27 20:12:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-27 20:12:31,767 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-27 20:12:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:12:31,768 INFO L225 Difference]: With dead ends: 86 [2024-11-27 20:12:31,768 INFO L226 Difference]: Without dead ends: 86 [2024-11-27 20:12:31,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2024-11-27 20:12:31,770 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 63 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:12:31,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 862 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 664 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2024-11-27 20:12:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-27 20:12:31,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-27 20:12:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 78 states have internal predecessors, (83), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:12:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2024-11-27 20:12:31,775 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 55 [2024-11-27 20:12:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:12:31,775 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2024-11-27 20:12:31,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:12:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2024-11-27 20:12:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 20:12:31,776 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:12:31,776 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:12:31,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 20:12:31,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:12:31,977 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:12:31,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:12:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash -383366546, now seen corresponding path program 2 times [2024-11-27 20:12:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:12:31,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310570813] [2024-11-27 20:12:31,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:12:31,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:12:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:12:31,981 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:12:31,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:12:32,423 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:12:32,423 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:12:32,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-27 20:12:32,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:12:32,896 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-27 20:12:32,897 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 27 [2024-11-27 20:12:33,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:12:33,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2024-11-27 20:12:33,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:12:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:12:34,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 29 [2024-11-27 20:12:34,586 INFO L349 Elim1Store]: treesize reduction 84, result has 35.9 percent of original size [2024-11-27 20:12:34,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2024-11-27 20:12:35,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 42 [2024-11-27 20:12:35,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:12:36,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 50 [2024-11-27 20:12:36,107 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-27 20:12:36,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:12:36,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 65 [2024-11-27 20:12:37,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 20:12:37,929 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 20:12:37,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2024-11-27 20:12:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:12:38,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:12:40,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 192 [2024-11-27 20:12:45,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:12:45,296 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 170 [2024-11-27 20:12:54,052 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:12:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310570813] [2024-11-27 20:12:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310570813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:12:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1083448667] [2024-11-27 20:12:54,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:12:54,052 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:12:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:12:54,054 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:12:54,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-27 20:12:54,609 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:12:54,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:12:54,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-27 20:12:54,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:12:54,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-27 20:12:56,610 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-27 20:12:56,610 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 [2024-11-27 20:12:57,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:12:58,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:12:58,764 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-27 20:12:58,764 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 19 treesize of output 11 [2024-11-27 20:13:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:13:04,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-27 20:13:04,529 INFO L349 Elim1Store]: treesize reduction 102, result has 31.5 percent of original size [2024-11-27 20:13:04,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 67 [2024-11-27 20:13:05,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2024-11-27 20:13:06,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:13:06,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 42 [2024-11-27 20:13:06,640 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 20:13:06,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:13:07,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 56 [2024-11-27 20:13:08,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 20:13:09,717 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 20:13:09,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 29 [2024-11-27 20:13:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:13:09,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:13:10,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 192 [2024-11-27 20:13:11,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:13:11,465 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 170 [2024-11-27 20:13:40,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1083448667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:13:40,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:13:40,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 59 [2024-11-27 20:13:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519466246] [2024-11-27 20:13:40,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:13:40,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-27 20:13:40,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:13:40,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-27 20:13:40,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5185, Unknown=71, NotChecked=0, Total=5550 [2024-11-27 20:13:40,027 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 60 states, 57 states have (on average 1.631578947368421) internal successors, (93), 51 states have internal predecessors, (93), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:14:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:14:03,986 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2024-11-27 20:14:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-27 20:14:03,987 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 1.631578947368421) internal successors, (93), 51 states have internal predecessors, (93), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2024-11-27 20:14:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:14:03,988 INFO L225 Difference]: With dead ends: 93 [2024-11-27 20:14:03,988 INFO L226 Difference]: Without dead ends: 93 [2024-11-27 20:14:03,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 75.4s TimeCoverageRelationStatistics Valid=555, Invalid=8682, Unknown=75, NotChecked=0, Total=9312 [2024-11-27 20:14:03,991 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 125 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:14:03,991 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 810 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2024-11-27 20:14:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-27 20:14:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2024-11-27 20:14:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 81 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:14:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2024-11-27 20:14:03,996 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 57 [2024-11-27 20:14:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:14:03,996 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2024-11-27 20:14:03,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 1.631578947368421) internal successors, (93), 51 states have internal predecessors, (93), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:14:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2024-11-27 20:14:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 20:14:03,998 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:14:03,998 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:14:04,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2024-11-27 20:14:04,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-27 20:14:04,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:14:04,399 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:14:04,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:14:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash -383366545, now seen corresponding path program 2 times [2024-11-27 20:14:04,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:14:04,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89726455] [2024-11-27 20:14:04,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:14:04,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:14:04,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:14:04,401 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:14:04,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 20:14:04,876 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:14:04,876 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:14:04,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-27 20:14:04,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:14:04,900 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 [2024-11-27 20:14:05,905 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 20:14:05,905 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 [2024-11-27 20:14:05,962 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 20:14:05,962 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 [2024-11-27 20:14:06,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:14:06,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:14:07,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-27 20:14:07,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-27 20:14:07,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:14:07,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:14:08,293 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-27 20:14:08,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2024-11-27 20:14:08,395 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-27 20:14:08,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 35 [2024-11-27 20:14:08,454 INFO L349 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2024-11-27 20:14:08,454 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 1 case distinctions, treesize of input 14 treesize of output 16 [2024-11-27 20:14:08,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-11-27 20:14:08,562 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-27 20:14:08,562 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 17 treesize of output 17 [2024-11-27 20:14:09,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 36 [2024-11-27 20:14:09,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-11-27 20:14:10,366 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-27 20:14:10,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:14:10,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 36 [2024-11-27 20:14:10,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 56 [2024-11-27 20:14:12,507 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 20:14:12,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 27 [2024-11-27 20:14:12,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:14:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:14:13,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:14:25,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:14:25,686 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 402 treesize of output 378 [2024-11-27 20:14:25,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:14:25,719 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 367 treesize of output 329 [2024-11-27 20:14:26,509 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse12 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse8 (select .cse12 |c_ULTIMATE.start_sll_prepend_~head#1.offset|)) (.cse5 (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse12 |c_ULTIMATE.start_sll_prepend_~head#1.offset| (_ bv0 32))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (.cse7 (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51| (_ BitVec 32))) (or (forall ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse0 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51| v_arrayElimArr_4)) (.cse3 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51| v_arrayElimArr_3)) (.cse4 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse1 (select (select .cse3 .cse4) .cse5)) (.cse2 (bvadd (select (select .cse0 .cse4) .cse5) (_ bv4 32)))) (bvule (bvadd (_ bv8 32) (select (select .cse0 .cse1) .cse2)) (select (store |c_#length| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51| (_ bv8 32)) (select (select .cse3 .cse1) .cse2))))) (not (= .cse7 (select v_arrayElimArr_3 (_ bv4 32)))))) (not (= .cse8 (select v_arrayElimArr_4 (_ bv4 32)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51|))))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51|))) (forall ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= .cse8 (select v_arrayElimArr_4 (_ bv4 32)))) (forall ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51| v_arrayElimArr_4)) (.cse11 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select .cse10 (select (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_51| v_arrayElimArr_3) .cse11) .cse5)) (bvadd (select (select .cse10 .cse11) .cse5) (_ bv4 32)))))) (bvule (bvadd (_ bv4 32) .cse9) (bvadd (_ bv8 32) .cse9))) (not (= .cse7 (select v_arrayElimArr_3 (_ bv4 32))))))))))))) is different from false [2024-11-27 20:14:26,593 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:14:26,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89726455] [2024-11-27 20:14:26,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89726455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:14:26,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [742452485] [2024-11-27 20:14:26,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:14:26,594 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:14:26,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:14:26,596 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:14:26,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2024-11-27 20:14:27,268 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:14:27,268 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:14:27,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-27 20:14:27,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:14:27,630 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 [2024-11-27 20:14:27,643 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 [2024-11-27 20:14:29,982 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 20:14:29,982 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 [2024-11-27 20:14:30,106 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-27 20:14:30,107 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 27 [2024-11-27 20:14:31,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:14:31,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:14:33,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2024-11-27 20:14:33,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:14:33,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:14:33,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-27 20:14:51,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:14:51,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2024-11-27 20:14:51,760 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2024-11-27 20:14:51,760 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 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-27 20:14:51,875 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-27 20:14:51,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2024-11-27 20:14:51,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-27 20:14:54,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 40 [2024-11-27 20:14:54,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-11-27 20:14:55,254 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 20:14:55,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:14:55,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 48 [2024-11-27 20:14:56,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 68 [2024-11-27 20:14:59,600 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 20:14:59,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 31 [2024-11-27 20:14:59,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:15:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:01,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:03,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:15:03,068 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 402 treesize of output 378 [2024-11-27 20:15:03,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:15:03,141 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 367 treesize of output 329 [2024-11-27 20:15:04,135 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse12 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse8 (select .cse12 |c_ULTIMATE.start_sll_prepend_~head#1.offset|)) (.cse7 (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.offset|)) (.cse5 (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse12 |c_ULTIMATE.start_sll_prepend_~head#1.offset| (_ bv0 32))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55| (_ BitVec 32))) (or (forall ((v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse0 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55| v_arrayElimArr_6)) (.cse3 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55| v_arrayElimArr_5)) (.cse4 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse1 (select (select .cse3 .cse4) .cse5)) (.cse2 (bvadd (_ bv4 32) (select (select .cse0 .cse4) .cse5)))) (bvule (bvadd (_ bv8 32) (select (select .cse0 .cse1) .cse2)) (select (store |c_#length| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55| (_ bv8 32)) (select (select .cse3 .cse1) .cse2))))) (not (= (select v_arrayElimArr_5 (_ bv4 32)) .cse7)))) (not (= .cse8 (select v_arrayElimArr_6 (_ bv4 32)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55|))))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55| (_ BitVec 32))) (or (forall ((v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= .cse8 (select v_arrayElimArr_6 (_ bv4 32)))) (forall ((v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_5 (_ bv4 32)) .cse7)) (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55| v_arrayElimArr_6)) (.cse11 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select .cse10 (select (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55| v_arrayElimArr_5) .cse11) .cse5)) (bvadd (_ bv4 32) (select (select .cse10 .cse11) .cse5)))))) (bvule (bvadd (_ bv4 32) .cse9) (bvadd (_ bv8 32) .cse9))))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_55|)))))))) is different from false [2024-11-27 20:15:04,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [742452485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:04,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:04,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 63 [2024-11-27 20:15:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553235346] [2024-11-27 20:15:04,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:04,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-27 20:15:04,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:04,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-27 20:15:04,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5596, Unknown=6, NotChecked=302, Total=6162 [2024-11-27 20:15:04,196 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 64 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 55 states have internal predecessors, (98), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:15:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:15:26,090 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2024-11-27 20:15:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-27 20:15:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 55 states have internal predecessors, (98), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2024-11-27 20:15:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:15:26,092 INFO L225 Difference]: With dead ends: 95 [2024-11-27 20:15:26,092 INFO L226 Difference]: Without dead ends: 95 [2024-11-27 20:15:26,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 57.4s TimeCoverageRelationStatistics Valid=493, Invalid=9409, Unknown=6, NotChecked=394, Total=10302 [2024-11-27 20:15:26,094 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 57 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:15:26,095 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1147 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2024-11-27 20:15:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-27 20:15:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2024-11-27 20:15:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 83 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:15:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2024-11-27 20:15:26,099 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 57 [2024-11-27 20:15:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:15:26,100 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2024-11-27 20:15:26,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 55 states have internal predecessors, (98), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:15:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2024-11-27 20:15:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 20:15:26,101 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:15:26,101 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:26,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2024-11-27 20:15:26,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-27 20:15:26,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:26,502 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:15:26,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1000531069, now seen corresponding path program 1 times [2024-11-27 20:15:26,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:26,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610901291] [2024-11-27 20:15:26,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:26,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:26,506 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:26,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 20:15:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:26,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-27 20:15:26,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:27,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:15:27,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-27 20:15:27,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:15:28,548 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-27 20:15:28,548 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 17 treesize of output 17 [2024-11-27 20:15:28,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-27 20:15:29,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:15:29,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:15:29,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-27 20:15:29,915 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 20:15:29,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:15:29,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 27 [2024-11-27 20:15:30,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2024-11-27 20:15:30,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-27 20:15:30,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 20:15:31,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:15:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:15:31,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:33,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 166 [2024-11-27 20:15:33,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 238 [2024-11-27 20:15:34,991 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse9 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse1 (select .cse9 |c_ULTIMATE.start_sll_prepend_~head#1.offset|)) (.cse2 (select .cse8 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (let ((.cse6 (and (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| v_ArrVal_1514) v_arrayElimCell_172) v_arrayElimCell_173))) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse11 (select (store |c_#memory_int#1| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| v_ArrVal_1514) v_arrayElimCell_172))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select .cse11 v_arrayElimCell_173)) (= |c_ULTIMATE.start_main_~data~0#1| (select .cse11 .cse2))))))) (.cse4 (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse10 (store |c_#memory_int#1| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| v_ArrVal_1514))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse10 v_arrayElimCell_172) v_arrayElimCell_173)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse10 .cse1) .cse2)))))) (.cse5 (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse9 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|)) (.cse7 (= |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse8 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and (forall ((v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| v_ArrVal_1514))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse0 .cse1) .cse2)) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32))) (let ((.cse3 (select .cse0 v_arrayElimCell_172))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select .cse3 v_arrayElimCell_173)) (= |c_ULTIMATE.start_main_~data~0#1| (select .cse3 .cse2)))))))) (or .cse4 (= |c_ULTIMATE.start_sll_prepend_~new_head~1#1.offset| (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or .cse5 .cse6) (or .cse7 .cse6) (or (= (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base|) .cse4) (or (forall ((v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_sll_prepend_~new_head~1#1.base| v_ArrVal_1514) .cse1) .cse2))) (not .cse5) (not .cse7)))))) is different from false [2024-11-27 20:15:36,974 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse10 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse2 (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse10 |c_ULTIMATE.start_sll_prepend_~head#1.offset| (_ bv0 32))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (.cse4 (select .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset|)) (.cse1 (select .cse10 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (and (or (and (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (_ bv0 1))) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| v_ArrVal_1514) v_arrayElimCell_172) v_arrayElimCell_173))))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (_ bv0 1))) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| v_ArrVal_1514) v_arrayElimCell_172))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select .cse0 v_arrayElimCell_173)) (= |c_ULTIMATE.start_main_~data~0#1| (select .cse0 .cse1)))))))) .cse2) (or (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (_ bv0 1))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| v_ArrVal_1514) .cse4) .cse1)))) (not .cse2)) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (_ bv0 1))) (forall ((v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| v_ArrVal_1514))) (or (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32))) (let ((.cse5 (select .cse6 v_arrayElimCell_172))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select .cse5 v_arrayElimCell_173)) (= |c_ULTIMATE.start_main_~data~0#1| (select .cse5 .cse1))))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse6 .cse4) .cse1))))))) (or (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (_ BitVec 32)) (v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse7 (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| v_ArrVal_1514))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (_ bv0 1))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse7 .cse4) .cse1)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse7 v_arrayElimCell_172) v_arrayElimCell_173)))))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (_ bv0 1))) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| v_ArrVal_1514) v_arrayElimCell_172) v_arrayElimCell_173))) (= |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (_ bv0 1))) (= |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| v_ArrVal_1514) v_arrayElimCell_172))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select .cse8 v_arrayElimCell_173)) (= |c_ULTIMATE.start_main_~data~0#1| (select .cse8 .cse1))))))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (_ bv0 1))) (= (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59|) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse9 (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_59| v_ArrVal_1514))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse9 .cse4) .cse1)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse9 v_arrayElimCell_172) v_arrayElimCell_173)))))))))) is different from false [2024-11-27 20:15:37,004 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:37,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610901291] [2024-11-27 20:15:37,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610901291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:37,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591231939] [2024-11-27 20:15:37,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:37,004 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:15:37,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:15:37,006 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:15:37,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-27 20:15:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:37,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-27 20:15:37,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:37,921 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 [2024-11-27 20:15:38,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:15:38,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-27 20:15:39,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:15:39,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-27 20:15:40,062 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-27 20:15:40,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2024-11-27 20:15:40,168 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-27 20:15:40,168 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 17 treesize of output 17 [2024-11-27 20:15:41,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-27 20:15:41,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:15:41,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:15:42,201 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 20:15:42,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:15:42,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 27 [2024-11-27 20:15:42,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2024-11-27 20:15:43,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-27 20:15:43,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 20:15:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:15:44,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:45,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 166 [2024-11-27 20:15:45,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 238 [2024-11-27 20:15:47,579 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse10 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse5 (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse10 |c_ULTIMATE.start_sll_prepend_~head#1.offset| (_ bv0 32))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (.cse3 (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset|)) (.cse1 (select .cse10 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|))) (forall ((v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| v_ArrVal_1514))) (or (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32))) (let ((.cse0 (select .cse2 v_arrayElimCell_172))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select .cse0 v_arrayElimCell_173)) (= (select .cse0 .cse1) |c_ULTIMATE.start_main_~data~0#1|)))) (= (select (select .cse2 .cse3) .cse1) |c_ULTIMATE.start_main_~data~0#1|)))))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| v_ArrVal_1514) v_arrayElimCell_172) v_arrayElimCell_173))))) (or (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|))) (= (select (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| v_ArrVal_1514) .cse3) .cse1) |c_ULTIMATE.start_main_~data~0#1|) (not (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|)))) (not .cse5)) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| v_ArrVal_1514) v_arrayElimCell_172))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select .cse6 v_arrayElimCell_173)) (= (select .cse6 .cse1) |c_ULTIMATE.start_main_~data~0#1|)))))) (or (and (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|))) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse7 (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| v_ArrVal_1514) v_arrayElimCell_172))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select .cse7 v_arrayElimCell_173)) (= (select .cse7 .cse1) |c_ULTIMATE.start_main_~data~0#1|)))))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|))) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| v_ArrVal_1514) v_arrayElimCell_172) v_arrayElimCell_173)))))) .cse5) (or (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| (_ BitVec 32)) (v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| v_ArrVal_1514))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse8 v_arrayElimCell_172) v_arrayElimCell_173)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|))) (= (select (select .cse8 .cse3) .cse1) |c_ULTIMATE.start_main_~data~0#1|))))) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|))) (forall ((v_arrayElimCell_173 (_ BitVec 32)) (v_arrayElimCell_172 (_ BitVec 32)) (v_ArrVal_1514 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse9 (store |c_#memory_int#1| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63| v_ArrVal_1514))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse9 v_arrayElimCell_172) v_arrayElimCell_173)) (= (select (select .cse9 .cse3) .cse1) |c_ULTIMATE.start_main_~data~0#1|)))) (= (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_63|)))))) is different from false [2024-11-27 20:15:47,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591231939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:15:47,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:47,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 44 [2024-11-27 20:15:47,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7791879] [2024-11-27 20:15:47,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:47,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-27 20:15:47,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:47,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-27 20:15:47,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2580, Unknown=36, NotChecked=312, Total=3080 [2024-11-27 20:15:47,600 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 44 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:15:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:15:57,229 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2024-11-27 20:15:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-27 20:15:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2024-11-27 20:15:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:15:57,231 INFO L225 Difference]: With dead ends: 95 [2024-11-27 20:15:57,232 INFO L226 Difference]: Without dead ends: 95 [2024-11-27 20:15:57,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=260, Invalid=4270, Unknown=38, NotChecked=402, Total=4970 [2024-11-27 20:15:57,234 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:15:57,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1023 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1319 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2024-11-27 20:15:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-27 20:15:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2024-11-27 20:15:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 83 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:15:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-27 20:15:57,239 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 58 [2024-11-27 20:15:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:15:57,239 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-27 20:15:57,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:15:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-27 20:15:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-27 20:15:57,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:15:57,241 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:57,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2024-11-27 20:15:57,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-27 20:15:57,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:57,642 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:15:57,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -552309656, now seen corresponding path program 2 times [2024-11-27 20:15:57,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:57,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038150544] [2024-11-27 20:15:57,642 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:57,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:57,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:57,644 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:57,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 20:15:58,033 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:58,033 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:58,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-27 20:15:58,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:58,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:15:59,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-27 20:15:59,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:16:00,008 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-27 20:16:00,008 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 17 treesize of output 17 [2024-11-27 20:16:00,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2024-11-27 20:16:00,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:16:00,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2024-11-27 20:16:01,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2024-11-27 20:16:01,572 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-27 20:16:01,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:16:01,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2024-11-27 20:16:02,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 20:16:03,091 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-27 20:16:03,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2024-11-27 20:16:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:03,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:05,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2024-11-27 20:16:14,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:16:14,171 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 159 [2024-11-27 20:16:14,823 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse8 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse5 (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse8 |c_ULTIMATE.start_sll_prepend_~head#1.offset| (_ bv0 32))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (.cse0 (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (and (forall ((v_arrayElimArr_7 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= .cse0 (select v_arrayElimArr_7 (_ bv4 32)))) (forall ((v_arrayElimCell_202 (_ BitVec 32)) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67|))) (not (= (select (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67| v_arrayElimArr_7))) (select .cse1 (select (select .cse1 .cse2) .cse3))) (bvadd v_arrayElimCell_202 (_ bv4 32))) (_ bv0 32))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67|))))) (or (not .cse5) (forall ((|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67| (_ BitVec 32)) (v_arrayElimArr_7 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse7 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67|))) (not (= (_ bv0 32) (select (let ((.cse6 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67| v_arrayElimArr_7))) (select .cse6 (select (select .cse6 .cse7) (_ bv4 32)))) (bvadd (_ bv4 32) (select .cse8 |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (not (= .cse7 |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67|)) (not (= .cse0 (select v_arrayElimArr_7 (_ bv4 32)))))))) (or .cse5 (forall ((v_arrayElimCell_202 (_ BitVec 32)) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67| (_ BitVec 32)) (v_arrayElimArr_7 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67|))) (not (= (select (let ((.cse9 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_67| v_arrayElimArr_7))) (select .cse9 (select (select .cse9 .cse2) .cse3))) (bvadd v_arrayElimCell_202 (_ bv4 32))) (_ bv0 32))) (not (= .cse0 (select v_arrayElimArr_7 (_ bv4 32)))))))))) is different from false [2024-11-27 20:16:14,868 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:14,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038150544] [2024-11-27 20:16:14,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038150544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:16:14,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [790265953] [2024-11-27 20:16:14,868 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:16:14,869 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:16:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:16:14,870 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:16:14,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-27 20:16:15,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:16:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767369565] [2024-11-27 20:16:15,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:16:15,403 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 [2024-11-27 20:16:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-27 20:16:15,407 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/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) [2024-11-27 20:16:15,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 1 [2024-11-27 20:16:15,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/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 (30)] Waiting until timeout for monitored process [2024-11-27 20:16:15,755 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:16:15,755 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:15,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-27 20:16:15,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:18,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:16:19,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-27 20:16:21,543 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-27 20:16:21,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-11-27 20:16:23,350 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-11-27 20:16:23,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 43 [2024-11-27 20:16:23,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:16:24,234 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-27 20:16:24,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 47 [2024-11-27 20:16:24,294 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 20:16:24,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:16:24,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2024-11-27 20:16:25,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 20:16:26,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:16:26,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2024-11-27 20:16:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:27,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:27,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2024-11-27 20:16:28,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:16:28,862 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 57 [2024-11-27 20:16:29,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:16:29,088 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2024-11-27 20:16:29,166 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse9 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|)) (.cse3 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|))) (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (.cse4 (select .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset|)) (.cse5 (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse9 |c_ULTIMATE.start_sll_prepend_~head#1.offset| (_ bv0 32))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (and (forall ((v_arrayElimArr_8 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_arrayElimCell_202 (_ BitVec 32)) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71| (_ BitVec 32))) (or (not (= (_ bv0 32) (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71| v_arrayElimArr_8))) (select .cse0 (select (select .cse0 .cse1) .cse2))) (bvadd v_arrayElimCell_202 (_ bv4 32))))) (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71|))) (not (= (select v_arrayElimArr_8 (_ bv4 32)) .cse4)))) (or .cse5 (forall ((v_arrayElimCell_202 (_ BitVec 32)) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71| (_ BitVec 32)) (v_arrayElimArr_8 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_8 (_ bv4 32)) .cse4)) (not (= (_ bv0 32) (select (let ((.cse6 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71| v_arrayElimArr_8))) (select .cse6 (select (select .cse6 .cse1) .cse2))) (bvadd v_arrayElimCell_202 (_ bv4 32)))))))) (or (forall ((v_arrayElimArr_9 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71| (_ BitVec 32))) (let ((.cse7 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_prepend_~head#1.base| (store .cse3 |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse7 |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71|)) (not (= (select v_arrayElimArr_9 (_ bv4 32)) .cse4)) (not (= (_ bv0 32) (select (let ((.cse8 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_71| v_arrayElimArr_9))) (select .cse8 (select (select .cse8 .cse7) (_ bv4 32)))) (bvadd (_ bv4 32) (select .cse9 |c_ULTIMATE.start_sll_prepend_~head#1.offset|)))))))) (not .cse5))))) is different from false [2024-11-27 20:16:29,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767369565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:16:29,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:16:29,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 59 [2024-11-27 20:16:29,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098284057] [2024-11-27 20:16:29,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:16:29,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-27 20:16:29,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:29,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-27 20:16:29,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=4480, Unknown=3, NotChecked=270, Total=4970 [2024-11-27 20:16:29,201 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 59 states, 57 states have (on average 1.631578947368421) internal successors, (93), 51 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:16:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:16:45,446 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-11-27 20:16:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-27 20:16:45,447 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.631578947368421) internal successors, (93), 51 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 60 [2024-11-27 20:16:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:16:45,448 INFO L225 Difference]: With dead ends: 91 [2024-11-27 20:16:45,448 INFO L226 Difference]: Without dead ends: 91 [2024-11-27 20:16:45,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=496, Invalid=8821, Unknown=3, NotChecked=382, Total=9702 [2024-11-27 20:16:45,452 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 82 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:16:45,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1494 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2024-11-27 20:16:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-27 20:16:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-27 20:16:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 83 states have internal predecessors, (88), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:16:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-11-27 20:16:45,456 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 60 [2024-11-27 20:16:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:16:45,456 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-11-27 20:16:45,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.631578947368421) internal successors, (93), 51 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:16:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-11-27 20:16:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-27 20:16:45,457 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:16:45,457 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:45,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/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 (30)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:45,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:45,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:45,858 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-27 20:16:45,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:45,858 INFO L85 PathProgramCache]: Analyzing trace with hash -498395659, now seen corresponding path program 3 times [2024-11-27 20:16:45,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:45,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654599729] [2024-11-27 20:16:45,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:16:45,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:45,861 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:45,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-27 20:16:52,404 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 20:16:52,404 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:52,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-27 20:16:52,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:52,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:16:52,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:16:53,720 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-27 20:16:53,720 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 27 [2024-11-27 20:16:53,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-27 20:16:53,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-27 20:16:54,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-27 20:16:54,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-27 20:16:55,091 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 20:16:55,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 29 [2024-11-27 20:16:55,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-27 20:16:55,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:17:12,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:17:12,132 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-27 20:17:12,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 53 [2024-11-27 20:17:12,209 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-27 20:17:12,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2024-11-27 20:17:12,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-11-27 20:17:13,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2024-11-27 20:17:13,638 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-27 20:17:13,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 55 [2024-11-27 20:17:14,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 61 [2024-11-27 20:17:14,410 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-27 20:17:14,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:17:14,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 80 [2024-11-27 20:17:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:17:18,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:17:30,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:17:30,291 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 423 treesize of output 385 [2024-11-27 20:17:30,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:17:30,334 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 374 treesize of output 336 [2024-11-27 20:17:48,497 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:17:48,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654599729] [2024-11-27 20:17:48,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654599729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:17:48,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [46866524] [2024-11-27 20:17:48,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:17:48,498 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:17:48,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:17:48,500 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:17:48,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55250b3-98d9-48a0-b774-b576f56da178/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-27 20:17:49,319 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 20:17:49,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:17:49,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-27 20:17:49,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:17:50,901 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 [2024-11-27 20:17:54,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:17:54,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:17:57,732 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 [2024-11-27 20:18:03,555 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 20:18:03,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-27 20:18:03,898 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 20:18:03,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-27 20:18:04,208 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-27 20:18:04,209 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 [2024-11-27 20:18:08,408 INFO L349 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2024-11-27 20:18:08,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2024-11-27 20:18:08,833 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-11-27 20:18:08,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-11-27 20:18:17,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:18:17,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-27 20:18:17,162 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 20:18:17,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-27 20:18:17,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:18:17,257 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-27 20:18:17,258 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 19 treesize of output 11 [2024-11-27 20:18:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:18:26,443 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-27 20:18:26,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 53 [2024-11-27 20:18:27,104 INFO L349 Elim1Store]: treesize reduction 48, result has 56.8 percent of original size [2024-11-27 20:18:27,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 35 treesize of output 73 [2024-11-27 20:18:27,917 INFO L349 Elim1Store]: treesize reduction 102, result has 31.5 percent of original size [2024-11-27 20:18:27,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 67 [2024-11-27 20:18:28,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2024-11-27 20:18:36,558 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-27 20:18:36,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 62 [2024-11-27 20:18:36,686 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-27 20:18:36,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2024-11-27 20:18:40,273 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-27 20:18:40,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 21 [2024-11-27 20:18:40,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 84 [2024-11-27 20:18:43,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 127 [2024-11-27 20:19:14,370 INFO L349 Elim1Store]: treesize reduction 52, result has 63.1 percent of original size [2024-11-27 20:19:14,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 241 treesize of output 224 [2024-11-27 20:19:15,043 INFO L224 Elim1Store]: Index analysis took 630 ms [2024-11-27 20:19:18,007 INFO L349 Elim1Store]: treesize reduction 80, result has 58.5 percent of original size [2024-11-27 20:19:18,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 215 [2024-11-27 20:19:54,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:19:54,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 405