./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/dancing.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_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/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_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/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_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/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 c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:31:59,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:31:59,151 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 23:31:59,156 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:31:59,157 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:31:59,181 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:31:59,181 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:31:59,182 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:31:59,182 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:31:59,182 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:31:59,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:31:59,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:31:59,183 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:31:59,183 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:31:59,183 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:31:59,183 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:31:59,184 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:31:59,184 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:31:59,184 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:31:59,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:31:59,184 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 23:31:59,184 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 23:31:59,185 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 23:31:59,185 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:31:59,185 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 23:31:59,185 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:31:59,185 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:31:59,185 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:31:59,185 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:31:59,186 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:31:59,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:31:59,186 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:31:59,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:31:59,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:31:59,186 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:31:59,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:31:59,186 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:31:59,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:31:59,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:31:59,187 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:31:59,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:31:59,187 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:31:59,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:31:59,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:31:59,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:31:59,187 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:31:59,187 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:31:59,187 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_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/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 -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2024-11-27 23:31:59,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:31:59,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:31:59,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:31:59,469 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:31:59,470 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:31:59,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/heap-manipulation/dancing.i [2024-11-27 23:32:02,372 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/data/0e9cc606f/caa5fc27183543088ce28109a79a05c3/FLAG03ccaf832 [2024-11-27 23:32:02,708 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:32:02,709 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/sv-benchmarks/c/heap-manipulation/dancing.i [2024-11-27 23:32:02,727 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/data/0e9cc606f/caa5fc27183543088ce28109a79a05c3/FLAG03ccaf832 [2024-11-27 23:32:02,756 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/data/0e9cc606f/caa5fc27183543088ce28109a79a05c3 [2024-11-27 23:32:02,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:32:02,762 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:32:02,765 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:32:02,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:32:02,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:32:02,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:32:02" (1/1) ... [2024-11-27 23:32:02,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46600169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:02, skipping insertion in model container [2024-11-27 23:32:02,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:32:02" (1/1) ... [2024-11-27 23:32:02,824 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:32:03,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:32:03,125 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:32:03,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:32:03,228 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:32:03,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03 WrapperNode [2024-11-27 23:32:03,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:32:03,230 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:32:03,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:32:03,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:32:03,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,291 INFO L138 Inliner]: procedures = 124, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 95 [2024-11-27 23:32:03,291 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:32:03,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:32:03,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:32:03,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:32:03,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,304 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,311 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,338 INFO L175 MemorySlicer]: Split 23 memory accesses to 2 slices as follows [2, 21]. 91 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 9 writes are split as follows [0, 9]. [2024-11-27 23:32:03,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,338 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,351 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,363 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:32:03,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:32:03,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:32:03,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:32:03,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (1/1) ... [2024-11-27 23:32:03,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:32:03,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:03,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:32:03,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:32:03,453 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2024-11-27 23:32:03,453 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 23:32:03,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:32:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:32:03,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:32:03,579 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:32:03,581 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:32:04,095 INFO L? ?]: Removed 104 outVars from TransFormulas that were not future-live. [2024-11-27 23:32:04,095 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:32:04,114 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:32:04,114 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-27 23:32:04,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:32:04 BoogieIcfgContainer [2024-11-27 23:32:04,115 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:32:04,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:32:04,117 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:32:04,122 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:32:04,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:32:02" (1/3) ... [2024-11-27 23:32:04,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc3be8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:32:04, skipping insertion in model container [2024-11-27 23:32:04,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:03" (2/3) ... [2024-11-27 23:32:04,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc3be8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:32:04, skipping insertion in model container [2024-11-27 23:32:04,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:32:04" (3/3) ... [2024-11-27 23:32:04,126 INFO L128 eAbstractionObserver]: Analyzing ICFG dancing.i [2024-11-27 23:32:04,143 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:32:04,144 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dancing.i that has 3 procedures, 111 locations, 1 initial locations, 1 loop locations, and 44 error locations. [2024-11-27 23:32:04,203 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:32:04,224 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;@5fba4563, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:32:04,224 INFO L334 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2024-11-27 23:32:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 58 states have (on average 2.0) internal successors, (116), 102 states have internal predecessors, (116), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:32:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-27 23:32:04,237 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:04,238 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-27 23:32:04,240 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:04,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 47731, now seen corresponding path program 1 times [2024-11-27 23:32:04,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:04,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084887067] [2024-11-27 23:32:04,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:04,500 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 23:32:04,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:04,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084887067] [2024-11-27 23:32:04,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084887067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:04,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:04,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:32:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063870196] [2024-11-27 23:32:04,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:04,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:32:04,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:04,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:32:04,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:32:04,539 INFO L87 Difference]: Start difference. First operand has 111 states, 58 states have (on average 2.0) internal successors, (116), 102 states have internal predecessors, (116), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:04,740 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2024-11-27 23:32:04,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:32:04,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-27 23:32:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:04,750 INFO L225 Difference]: With dead ends: 108 [2024-11-27 23:32:04,750 INFO L226 Difference]: Without dead ends: 106 [2024-11-27 23:32:04,754 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 23:32:04,757 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 80 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:04,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 98 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:32:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-27 23:32:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-27 23:32:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 97 states have internal predecessors, (107), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:32:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-11-27 23:32:04,811 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 3 [2024-11-27 23:32:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:04,811 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-11-27 23:32:04,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:04,812 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-11-27 23:32:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-27 23:32:04,812 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:04,812 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-27 23:32:04,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:32:04,812 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:04,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash 47732, now seen corresponding path program 1 times [2024-11-27 23:32:04,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:04,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907041264] [2024-11-27 23:32:04,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:04,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:04,926 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 23:32:04,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907041264] [2024-11-27 23:32:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907041264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:04,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:04,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:32:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626924759] [2024-11-27 23:32:04,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:04,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:32:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:04,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:32:04,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:32:04,929 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:05,064 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2024-11-27 23:32:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:32:05,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-27 23:32:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:05,065 INFO L225 Difference]: With dead ends: 104 [2024-11-27 23:32:05,066 INFO L226 Difference]: Without dead ends: 104 [2024-11-27 23:32:05,066 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 23:32:05,067 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 80 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:05,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 96 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:32:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-27 23:32:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-11-27 23:32:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 56 states have (on average 1.875) internal successors, (105), 95 states have internal predecessors, (105), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:32:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2024-11-27 23:32:05,085 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 3 [2024-11-27 23:32:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:05,085 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2024-11-27 23:32:05,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2024-11-27 23:32:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 23:32:05,086 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:05,086 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:05,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:32:05,087 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:05,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash 38619504, now seen corresponding path program 1 times [2024-11-27 23:32:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194394779] [2024-11-27 23:32:05,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:05,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:05,238 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 23:32:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:05,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194394779] [2024-11-27 23:32:05,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194394779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:05,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:32:05,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847975442] [2024-11-27 23:32:05,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:05,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:32:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:05,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:32:05,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:32:05,240 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:05,379 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2024-11-27 23:32:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:32:05,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-27 23:32:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:05,382 INFO L225 Difference]: With dead ends: 103 [2024-11-27 23:32:05,382 INFO L226 Difference]: Without dead ends: 103 [2024-11-27 23:32:05,382 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 23:32:05,383 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:05,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 170 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:32:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-27 23:32:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2024-11-27 23:32:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 93 states have internal predecessors, (103), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:32:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2024-11-27 23:32:05,398 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 10 [2024-11-27 23:32:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:05,399 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2024-11-27 23:32:05,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2024-11-27 23:32:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 23:32:05,399 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:05,399 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:05,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:32:05,400 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:05,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:05,400 INFO L85 PathProgramCache]: Analyzing trace with hash 38619505, now seen corresponding path program 1 times [2024-11-27 23:32:05,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:05,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778629264] [2024-11-27 23:32:05,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:05,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:05,620 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 23:32:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778629264] [2024-11-27 23:32:05,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778629264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:05,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:05,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:32:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783864069] [2024-11-27 23:32:05,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:05,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:32:05,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:05,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:32:05,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:32:05,622 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:05,766 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2024-11-27 23:32:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:32:05,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-27 23:32:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:05,770 INFO L225 Difference]: With dead ends: 101 [2024-11-27 23:32:05,770 INFO L226 Difference]: Without dead ends: 101 [2024-11-27 23:32:05,771 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 23:32:05,771 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:05,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 172 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:32:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-27 23:32:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2024-11-27 23:32:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 91 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:32:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2024-11-27 23:32:05,783 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 10 [2024-11-27 23:32:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:05,784 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2024-11-27 23:32:05,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2024-11-27 23:32:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-27 23:32:05,785 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:05,785 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:05,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:32:05,785 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:05,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1203209609, now seen corresponding path program 1 times [2024-11-27 23:32:05,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:05,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188335249] [2024-11-27 23:32:05,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:05,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:05,988 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 23:32:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188335249] [2024-11-27 23:32:05,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188335249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:05,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:05,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:05,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310188890] [2024-11-27 23:32:05,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:05,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:05,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:05,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:05,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:05,991 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 23:32:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:06,134 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2024-11-27 23:32:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:32:06,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2024-11-27 23:32:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:06,139 INFO L225 Difference]: With dead ends: 176 [2024-11-27 23:32:06,139 INFO L226 Difference]: Without dead ends: 176 [2024-11-27 23:32:06,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:06,140 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 74 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:06,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 407 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:32:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-27 23:32:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 144. [2024-11-27 23:32:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 95 states have (on average 1.8736842105263158) internal successors, (178), 131 states have internal predecessors, (178), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:32:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 198 transitions. [2024-11-27 23:32:06,164 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 198 transitions. Word has length 11 [2024-11-27 23:32:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:06,164 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 198 transitions. [2024-11-27 23:32:06,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 23:32:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 198 transitions. [2024-11-27 23:32:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-27 23:32:06,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:06,165 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:06,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 23:32:06,165 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:06,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1541361773, now seen corresponding path program 1 times [2024-11-27 23:32:06,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:06,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737728561] [2024-11-27 23:32:06,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:06,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:06,435 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 23:32:06,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:06,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737728561] [2024-11-27 23:32:06,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737728561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:06,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:06,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:32:06,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562372093] [2024-11-27 23:32:06,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:06,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:06,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:06,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:06,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:06,437 INFO L87 Difference]: Start difference. First operand 144 states and 198 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:06,590 INFO L93 Difference]: Finished difference Result 143 states and 196 transitions. [2024-11-27 23:32:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:32:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-27 23:32:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:06,593 INFO L225 Difference]: With dead ends: 143 [2024-11-27 23:32:06,593 INFO L226 Difference]: Without dead ends: 143 [2024-11-27 23:32:06,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:06,594 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 206 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:06,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 110 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:32:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-27 23:32:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2024-11-27 23:32:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 95 states have (on average 1.8526315789473684) internal successors, (176), 130 states have internal predecessors, (176), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:32:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 196 transitions. [2024-11-27 23:32:06,604 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 196 transitions. Word has length 12 [2024-11-27 23:32:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:06,604 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 196 transitions. [2024-11-27 23:32:06,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 196 transitions. [2024-11-27 23:32:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-27 23:32:06,605 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:06,605 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:06,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:32:06,605 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:06,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:06,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1541361772, now seen corresponding path program 1 times [2024-11-27 23:32:06,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:06,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559508005] [2024-11-27 23:32:06,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:06,874 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 23:32:06,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:06,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559508005] [2024-11-27 23:32:06,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559508005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:06,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:06,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:32:06,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856411907] [2024-11-27 23:32:06,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:06,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:32:06,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:06,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:32:06,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:32:06,877 INFO L87 Difference]: Start difference. First operand 143 states and 196 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:07,026 INFO L93 Difference]: Finished difference Result 142 states and 194 transitions. [2024-11-27 23:32:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:32:07,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-27 23:32:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:07,028 INFO L225 Difference]: With dead ends: 142 [2024-11-27 23:32:07,028 INFO L226 Difference]: Without dead ends: 142 [2024-11-27 23:32:07,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:07,029 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 140 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:07,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 111 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:32:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-27 23:32:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2024-11-27 23:32:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 95 states have (on average 1.831578947368421) internal successors, (174), 129 states have internal predecessors, (174), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:32:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 194 transitions. [2024-11-27 23:32:07,038 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 194 transitions. Word has length 12 [2024-11-27 23:32:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:07,038 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 194 transitions. [2024-11-27 23:32:07,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 194 transitions. [2024-11-27 23:32:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-27 23:32:07,039 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:07,039 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:07,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 23:32:07,040 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:07,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1193165242, now seen corresponding path program 1 times [2024-11-27 23:32:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493057763] [2024-11-27 23:32:07,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:07,144 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 23:32:07,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:07,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493057763] [2024-11-27 23:32:07,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493057763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:07,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:07,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129875701] [2024-11-27 23:32:07,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:07,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:32:07,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:07,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:32:07,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:07,146 INFO L87 Difference]: Start difference. First operand 142 states and 194 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 23:32:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:07,412 INFO L93 Difference]: Finished difference Result 163 states and 188 transitions. [2024-11-27 23:32:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:32:07,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 16 [2024-11-27 23:32:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:07,414 INFO L225 Difference]: With dead ends: 163 [2024-11-27 23:32:07,414 INFO L226 Difference]: Without dead ends: 163 [2024-11-27 23:32:07,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:07,415 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 277 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:07,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 179 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:32:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-27 23:32:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2024-11-27 23:32:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 95 states have (on average 1.7157894736842105) internal successors, (163), 124 states have internal predecessors, (163), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:32:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2024-11-27 23:32:07,424 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 16 [2024-11-27 23:32:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:07,424 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2024-11-27 23:32:07,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 23:32:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2024-11-27 23:32:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-27 23:32:07,425 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:07,425 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:07,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 23:32:07,426 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:07,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1193165241, now seen corresponding path program 1 times [2024-11-27 23:32:07,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:07,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639984392] [2024-11-27 23:32:07,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:07,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:07,714 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 23:32:07,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:07,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639984392] [2024-11-27 23:32:07,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639984392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:07,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:07,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:07,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7457991] [2024-11-27 23:32:07,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:07,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:32:07,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:07,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:32:07,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:07,716 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 23:32:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:08,075 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2024-11-27 23:32:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:32:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 16 [2024-11-27 23:32:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:08,076 INFO L225 Difference]: With dead ends: 158 [2024-11-27 23:32:08,076 INFO L226 Difference]: Without dead ends: 158 [2024-11-27 23:32:08,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:08,077 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 197 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:08,078 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 238 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:32:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-27 23:32:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2024-11-27 23:32:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 95 states have (on average 1.6526315789473685) internal successors, (157), 124 states have internal predecessors, (157), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:32:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2024-11-27 23:32:08,087 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 16 [2024-11-27 23:32:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:08,092 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2024-11-27 23:32:08,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 23:32:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2024-11-27 23:32:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-27 23:32:08,096 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:08,097 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:08,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 23:32:08,097 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:08,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash -641483894, now seen corresponding path program 1 times [2024-11-27 23:32:08,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:08,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430323682] [2024-11-27 23:32:08,098 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:08,576 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 23:32:08,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430323682] [2024-11-27 23:32:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430323682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:08,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 23:32:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280554933] [2024-11-27 23:32:08,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:08,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:32:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:08,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:32:08,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:08,578 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 23:32:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:08,857 INFO L93 Difference]: Finished difference Result 187 states and 237 transitions. [2024-11-27 23:32:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:32:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 20 [2024-11-27 23:32:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:08,858 INFO L225 Difference]: With dead ends: 187 [2024-11-27 23:32:08,858 INFO L226 Difference]: Without dead ends: 187 [2024-11-27 23:32:08,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:08,859 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 245 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:08,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 396 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:32:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-27 23:32:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 147. [2024-11-27 23:32:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 104 states have (on average 1.6153846153846154) internal successors, (168), 133 states have internal predecessors, (168), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-27 23:32:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2024-11-27 23:32:08,875 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 20 [2024-11-27 23:32:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:08,875 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2024-11-27 23:32:08,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 23:32:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2024-11-27 23:32:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 23:32:08,876 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:08,876 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:08,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 23:32:08,879 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:08,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1901310917, now seen corresponding path program 1 times [2024-11-27 23:32:08,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:08,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632886240] [2024-11-27 23:32:08,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:08,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:09,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:09,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632886240] [2024-11-27 23:32:09,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632886240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:09,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282920995] [2024-11-27 23:32:09,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:09,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:09,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:09,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:09,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:32:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:09,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:32:09,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:09,211 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:09,282 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 23:32:09,283 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 12 treesize of output 11 [2024-11-27 23:32:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:09,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282920995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:09,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:09,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-11-27 23:32:09,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401250432] [2024-11-27 23:32:09,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:09,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:32:09,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:09,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:32:09,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:09,310 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 23:32:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:09,543 INFO L93 Difference]: Finished difference Result 161 states and 209 transitions. [2024-11-27 23:32:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:32:09,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 21 [2024-11-27 23:32:09,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:09,545 INFO L225 Difference]: With dead ends: 161 [2024-11-27 23:32:09,545 INFO L226 Difference]: Without dead ends: 161 [2024-11-27 23:32:09,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:09,546 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 142 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:09,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 200 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:32:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-27 23:32:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2024-11-27 23:32:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.6036036036036037) internal successors, (178), 139 states have internal predecessors, (178), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 23:32:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 202 transitions. [2024-11-27 23:32:09,561 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 202 transitions. Word has length 21 [2024-11-27 23:32:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:09,562 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 202 transitions. [2024-11-27 23:32:09,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 23:32:09,562 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 202 transitions. [2024-11-27 23:32:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 23:32:09,563 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:09,563 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:09,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:09,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 23:32:09,764 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:09,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1901310916, now seen corresponding path program 1 times [2024-11-27 23:32:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780793021] [2024-11-27 23:32:09,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:10,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:10,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780793021] [2024-11-27 23:32:10,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780793021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:10,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388665663] [2024-11-27 23:32:10,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:10,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:10,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:10,013 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:10,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:32:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:10,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:32:10,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:10,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:10,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:10,518 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 21 treesize of output 25 [2024-11-27 23:32:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:10,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388665663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:10,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:10,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 16 [2024-11-27 23:32:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639602933] [2024-11-27 23:32:10,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:10,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:32:10,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:10,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:32:10,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:32:10,664 INFO L87 Difference]: Start difference. First operand 155 states and 202 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:11,178 INFO L93 Difference]: Finished difference Result 159 states and 207 transitions. [2024-11-27 23:32:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:32:11,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-27 23:32:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:11,180 INFO L225 Difference]: With dead ends: 159 [2024-11-27 23:32:11,180 INFO L226 Difference]: Without dead ends: 159 [2024-11-27 23:32:11,180 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:32:11,181 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 394 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:11,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 343 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:32:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-27 23:32:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2024-11-27 23:32:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.5765765765765767) internal successors, (175), 138 states have internal predecessors, (175), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 23:32:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2024-11-27 23:32:11,189 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 21 [2024-11-27 23:32:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:11,189 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2024-11-27 23:32:11,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2024-11-27 23:32:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-27 23:32:11,190 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:11,190 INFO L218 NwaCegarLoop]: trace histogram [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 23:32:11,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 23:32:11,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:32:11,394 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:11,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1959265044, now seen corresponding path program 1 times [2024-11-27 23:32:11,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:11,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123984553] [2024-11-27 23:32:11,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:11,655 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 23:32:11,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:11,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123984553] [2024-11-27 23:32:11,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123984553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:11,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:11,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:32:11,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732761461] [2024-11-27 23:32:11,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:11,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:32:11,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:11,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:32:11,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:32:11,657 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 23:32:11,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:11,877 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2024-11-27 23:32:11,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:32:11,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 22 [2024-11-27 23:32:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:11,879 INFO L225 Difference]: With dead ends: 189 [2024-11-27 23:32:11,879 INFO L226 Difference]: Without dead ends: 189 [2024-11-27 23:32:11,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:32:11,880 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 113 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:11,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 382 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:32:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-27 23:32:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 156. [2024-11-27 23:32:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 113 states have (on average 1.5663716814159292) internal successors, (177), 140 states have internal predecessors, (177), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 23:32:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2024-11-27 23:32:11,894 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 22 [2024-11-27 23:32:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:11,895 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2024-11-27 23:32:11,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 23:32:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2024-11-27 23:32:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 23:32:11,897 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:11,898 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:11,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 23:32:11,898 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:11,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1179167020, now seen corresponding path program 1 times [2024-11-27 23:32:11,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:11,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917328946] [2024-11-27 23:32:11,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:11,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:12,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:12,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917328946] [2024-11-27 23:32:12,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917328946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:12,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103545455] [2024-11-27 23:32:12,031 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:12,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:12,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:12,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:12,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:32:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:12,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:32:12,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:12,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:12,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103545455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:12,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:12,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-27 23:32:12,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290421539] [2024-11-27 23:32:12,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:12,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:32:12,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:12,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:32:12,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:32:12,455 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:13,029 INFO L93 Difference]: Finished difference Result 183 states and 216 transitions. [2024-11-27 23:32:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:32:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-11-27 23:32:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:13,031 INFO L225 Difference]: With dead ends: 183 [2024-11-27 23:32:13,031 INFO L226 Difference]: Without dead ends: 181 [2024-11-27 23:32:13,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:32:13,032 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 225 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:13,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 570 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:32:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-27 23:32:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 156. [2024-11-27 23:32:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 113 states have (on average 1.5575221238938053) internal successors, (176), 140 states have internal predecessors, (176), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 23:32:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 200 transitions. [2024-11-27 23:32:13,045 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 200 transitions. Word has length 26 [2024-11-27 23:32:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:13,046 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 200 transitions. [2024-11-27 23:32:13,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 200 transitions. [2024-11-27 23:32:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:32:13,047 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:13,047 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:13,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:13,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:32:13,248 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:13,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1164486572, now seen corresponding path program 1 times [2024-11-27 23:32:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:13,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862219468] [2024-11-27 23:32:13,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:13,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:13,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862219468] [2024-11-27 23:32:13,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862219468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:13,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057555703] [2024-11-27 23:32:13,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:13,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:13,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:32:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:13,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-27 23:32:13,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:13,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:32:13,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:32:14,018 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 23:32:14,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:14,106 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 18 treesize of output 13 [2024-11-27 23:32:14,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:14,118 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 18 treesize of output 13 [2024-11-27 23:32:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:14,152 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 18 treesize of output 13 [2024-11-27 23:32:14,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:14,166 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 18 treesize of output 13 [2024-11-27 23:32:14,223 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-27 23:32:14,223 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 29 treesize of output 17 [2024-11-27 23:32:14,246 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2024-11-27 23:32:14,247 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 23 treesize of output 22 [2024-11-27 23:32:15,162 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 42 treesize of output 18 [2024-11-27 23:32:15,173 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 9 treesize of output 3 [2024-11-27 23:32:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:15,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:15,909 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4))) (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_441 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_441))) (store .cse1 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~#list~0#1.base|) .cse2))) (or (= .cse0 0) (= (select |c_#valid| .cse0) 1)))) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_441 (Array Int Int)) (v_ArrVal_442 (Array Int Int))) (let ((.cse4 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4))) (or (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_442))) (store .cse3 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 |c_ULTIMATE.start_main_~n~0#1.offset|))) |c_ULTIMATE.start_main_~#list~0#1.base|) .cse2) 0) (= (select |c_#valid| (select (select (let ((.cse5 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_441))) (store .cse5 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~#list~0#1.base|) .cse2)) 1)))))) is different from false [2024-11-27 23:32:16,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:16,017 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 211 treesize of output 216 [2024-11-27 23:32:25,728 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~#list~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_main_~n~0#1.base_25| Int)) (or (forall ((v_prenex_1 Int) (v_prenex_2 (Array Int Int))) (= |v_ULTIMATE.start_main_~n~0#1.base_25| (select (store (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_main_~n~0#1.base_25| v_prenex_2) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_25|) .cse0))) (forall ((v_ArrVal_442 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~n~0#1.base_25| v_ArrVal_442) |c_ULTIMATE.start_main_~#list~0#1.base|) .cse0))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_main_~n~0#1.base_25| 1)))) (forall ((|v_ULTIMATE.start_main_~n~0#1.base_25| Int)) (or (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_prenex_1 Int) (v_prenex_2 (Array Int Int)) (v_ArrVal_441 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_main_~n~0#1.base_25| v_prenex_2) |c_ULTIMATE.start_main_~#list~0#1.base|))) (or (= |v_ULTIMATE.start_main_~n~0#1.base_25| (select (store .cse1 (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_25|) .cse0)) (= (select .cse1 .cse0) (select (store (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_main_~n~0#1.base_25| v_ArrVal_441) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_25|) .cse0))))) (forall ((v_ArrVal_442 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~n~0#1.base_25| v_ArrVal_442) |c_ULTIMATE.start_main_~#list~0#1.base|) .cse0))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_main_~n~0#1.base_25| 1)))) (forall ((|v_ULTIMATE.start_main_~n~0#1.base_25| Int)) (or (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_prenex_1 Int) (v_prenex_2 (Array Int Int)) (v_ArrVal_441 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_main_~n~0#1.base_25| v_ArrVal_441) |c_ULTIMATE.start_main_~#list~0#1.base|))) (let ((.cse3 (select .cse2 .cse0))) (or (= |v_ULTIMATE.start_main_~n~0#1.base_25| (select (store .cse2 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_25|) .cse0)) (= (select (store (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_main_~n~0#1.base_25| v_prenex_2) |c_ULTIMATE.start_main_~#list~0#1.base|) (+ v_prenex_1 4) |v_ULTIMATE.start_main_~n~0#1.base_25|) .cse0) .cse3) (= 0 .cse3))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_main_~n~0#1.base_25| 1)))) (forall ((|v_ULTIMATE.start_main_~n~0#1.base_25| Int)) (or (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_441 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_main_~n~0#1.base_25| v_ArrVal_441) |c_ULTIMATE.start_main_~#list~0#1.base|))) (or (= |v_ULTIMATE.start_main_~n~0#1.base_25| (select (store .cse4 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |v_ULTIMATE.start_main_~n~0#1.base_25|) .cse0)) (= 0 (select .cse4 .cse0))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_main_~n~0#1.base_25| 1)))))) is different from false [2024-11-27 23:32:25,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:25,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2024-11-27 23:32:25,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:25,808 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 17 [2024-11-27 23:32:25,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:25,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-27 23:32:25,824 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 36 treesize of output 24 [2024-11-27 23:32:25,833 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 16 treesize of output 12 [2024-11-27 23:32:25,845 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-27 23:32:25,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 1 [2024-11-27 23:32:25,851 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-11-27 23:32:25,862 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-27 23:32:25,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 1 [2024-11-27 23:32:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:25,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057555703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:25,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:25,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 37 [2024-11-27 23:32:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468585505] [2024-11-27 23:32:25,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:25,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-27 23:32:25,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:25,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-27 23:32:25,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1128, Unknown=23, NotChecked=138, Total=1406 [2024-11-27 23:32:25,961 INFO L87 Difference]: Start difference. First operand 156 states and 200 transitions. Second operand has 38 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:40,622 INFO L93 Difference]: Finished difference Result 453 states and 577 transitions. [2024-11-27 23:32:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-27 23:32:40,623 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-27 23:32:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:40,626 INFO L225 Difference]: With dead ends: 453 [2024-11-27 23:32:40,626 INFO L226 Difference]: Without dead ends: 453 [2024-11-27 23:32:40,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=459, Invalid=3941, Unknown=30, NotChecked=262, Total=4692 [2024-11-27 23:32:40,631 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 931 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 3491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 856 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:40,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 2042 Invalid, 3491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2499 Invalid, 0 Unknown, 856 Unchecked, 3.6s Time] [2024-11-27 23:32:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-11-27 23:32:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 206. [2024-11-27 23:32:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 152 states have (on average 1.5526315789473684) internal successors, (236), 181 states have internal predecessors, (236), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-27 23:32:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 276 transitions. [2024-11-27 23:32:40,655 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 276 transitions. Word has length 27 [2024-11-27 23:32:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:40,656 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 276 transitions. [2024-11-27 23:32:40,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 32 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 276 transitions. [2024-11-27 23:32:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:32:40,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:40,659 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:40,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:40,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 23:32:40,862 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:40,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1164486573, now seen corresponding path program 1 times [2024-11-27 23:32:40,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:40,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546184370] [2024-11-27 23:32:40,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:40,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546184370] [2024-11-27 23:32:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546184370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302549663] [2024-11-27 23:32:41,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:41,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:41,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:41,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:32:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:41,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 23:32:41,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:41,537 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 23:32:41,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:32:41,629 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 19 treesize of output 1 [2024-11-27 23:32:41,776 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 21 treesize of output 9 [2024-11-27 23:32:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:41,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:42,193 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 28 [2024-11-27 23:32:42,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:42,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:42,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:42,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:42,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302549663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:42,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:42,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2024-11-27 23:32:42,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11444886] [2024-11-27 23:32:42,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:42,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-27 23:32:42,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:42,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-27 23:32:42,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2024-11-27 23:32:42,321 INFO L87 Difference]: Start difference. First operand 206 states and 276 transitions. Second operand has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 20 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:44,468 INFO L93 Difference]: Finished difference Result 342 states and 445 transitions. [2024-11-27 23:32:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 23:32:44,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 20 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-27 23:32:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:44,470 INFO L225 Difference]: With dead ends: 342 [2024-11-27 23:32:44,470 INFO L226 Difference]: Without dead ends: 342 [2024-11-27 23:32:44,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2024-11-27 23:32:44,472 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 477 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:44,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 1600 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-27 23:32:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-27 23:32:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 260. [2024-11-27 23:32:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 195 states have (on average 1.5384615384615385) internal successors, (300), 226 states have internal predecessors, (300), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-27 23:32:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 356 transitions. [2024-11-27 23:32:44,486 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 356 transitions. Word has length 27 [2024-11-27 23:32:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:44,487 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 356 transitions. [2024-11-27 23:32:44,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 20 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 356 transitions. [2024-11-27 23:32:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:32:44,488 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:44,488 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-11-27 23:32:44,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:32:44,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:32:44,692 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:44,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1087119247, now seen corresponding path program 1 times [2024-11-27 23:32:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:44,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623585873] [2024-11-27 23:32:44,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:44,799 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 23:32:44,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623585873] [2024-11-27 23:32:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623585873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:44,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951607445] [2024-11-27 23:32:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:44,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:44,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:44,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:44,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:44,801 INFO L87 Difference]: Start difference. First operand 260 states and 356 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:44,842 INFO L93 Difference]: Finished difference Result 276 states and 377 transitions. [2024-11-27 23:32:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:32:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-11-27 23:32:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:44,847 INFO L225 Difference]: With dead ends: 276 [2024-11-27 23:32:44,847 INFO L226 Difference]: Without dead ends: 276 [2024-11-27 23:32:44,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:44,848 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 3 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:44,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 397 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:32:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-27 23:32:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2024-11-27 23:32:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 198 states have (on average 1.5303030303030303) internal successors, (303), 235 states have internal predecessors, (303), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 23 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-27 23:32:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 371 transitions. [2024-11-27 23:32:44,863 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 371 transitions. Word has length 27 [2024-11-27 23:32:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:44,864 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 371 transitions. [2024-11-27 23:32:44,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 371 transitions. [2024-11-27 23:32:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-27 23:32:44,866 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:44,866 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2024-11-27 23:32:44,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-27 23:32:44,866 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:44,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash 671448714, now seen corresponding path program 1 times [2024-11-27 23:32:44,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:44,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497425187] [2024-11-27 23:32:44,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:44,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:44,964 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 23:32:44,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:44,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497425187] [2024-11-27 23:32:44,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497425187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:44,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:44,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9431148] [2024-11-27 23:32:44,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:44,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:32:44,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:44,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:32:44,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:44,966 INFO L87 Difference]: Start difference. First operand 270 states and 371 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:32:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:45,213 INFO L93 Difference]: Finished difference Result 283 states and 363 transitions. [2024-11-27 23:32:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:32:45,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-27 23:32:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:45,215 INFO L225 Difference]: With dead ends: 283 [2024-11-27 23:32:45,217 INFO L226 Difference]: Without dead ends: 283 [2024-11-27 23:32:45,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:45,218 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 180 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:45,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 178 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:32:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-27 23:32:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 267. [2024-11-27 23:32:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 198 states have (on average 1.4646464646464648) internal successors, (290), 232 states have internal predecessors, (290), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 23 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-27 23:32:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 358 transitions. [2024-11-27 23:32:45,232 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 358 transitions. Word has length 28 [2024-11-27 23:32:45,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:45,233 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 358 transitions. [2024-11-27 23:32:45,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:32:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 358 transitions. [2024-11-27 23:32:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-27 23:32:45,234 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:45,234 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2024-11-27 23:32:45,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-27 23:32:45,234 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:45,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:45,235 INFO L85 PathProgramCache]: Analyzing trace with hash 671448715, now seen corresponding path program 1 times [2024-11-27 23:32:45,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:45,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795181174] [2024-11-27 23:32:45,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:45,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:45,395 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 23:32:45,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:45,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795181174] [2024-11-27 23:32:45,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795181174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:45,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:45,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:32:45,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57572887] [2024-11-27 23:32:45,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:45,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:32:45,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:45,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:32:45,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:45,397 INFO L87 Difference]: Start difference. First operand 267 states and 358 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:32:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:45,690 INFO L93 Difference]: Finished difference Result 280 states and 355 transitions. [2024-11-27 23:32:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:32:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-27 23:32:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:45,693 INFO L225 Difference]: With dead ends: 280 [2024-11-27 23:32:45,693 INFO L226 Difference]: Without dead ends: 280 [2024-11-27 23:32:45,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:45,693 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 212 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:45,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 174 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:32:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-11-27 23:32:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 267. [2024-11-27 23:32:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 198 states have (on average 1.4242424242424243) internal successors, (282), 232 states have internal predecessors, (282), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 23 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-27 23:32:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 350 transitions. [2024-11-27 23:32:45,710 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 350 transitions. Word has length 28 [2024-11-27 23:32:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:45,711 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 350 transitions. [2024-11-27 23:32:45,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:32:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 350 transitions. [2024-11-27 23:32:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-27 23:32:45,712 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:45,713 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:45,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-27 23:32:45,713 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:45,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1349019712, now seen corresponding path program 1 times [2024-11-27 23:32:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:45,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139509981] [2024-11-27 23:32:45,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:45,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:45,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:45,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139509981] [2024-11-27 23:32:45,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139509981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:45,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:45,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:32:45,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731239935] [2024-11-27 23:32:45,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:45,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:45,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:45,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:45,811 INFO L87 Difference]: Start difference. First operand 267 states and 350 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 23:32:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:46,114 INFO L93 Difference]: Finished difference Result 278 states and 353 transitions. [2024-11-27 23:32:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:32:46,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 28 [2024-11-27 23:32:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:46,116 INFO L225 Difference]: With dead ends: 278 [2024-11-27 23:32:46,116 INFO L226 Difference]: Without dead ends: 278 [2024-11-27 23:32:46,116 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:32:46,117 INFO L435 NwaCegarLoop]: 115 mSDtfsCounter, 70 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:46,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 315 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:32:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-27 23:32:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 266. [2024-11-27 23:32:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 198 states have (on average 1.4141414141414141) internal successors, (280), 231 states have internal predecessors, (280), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 23 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-27 23:32:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 348 transitions. [2024-11-27 23:32:46,135 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 348 transitions. Word has length 28 [2024-11-27 23:32:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:46,135 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 348 transitions. [2024-11-27 23:32:46,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 23:32:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 348 transitions. [2024-11-27 23:32:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-27 23:32:46,136 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:46,136 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:46,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-27 23:32:46,136 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:46,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1349019711, now seen corresponding path program 1 times [2024-11-27 23:32:46,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:46,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674666413] [2024-11-27 23:32:46,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:46,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:46,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:46,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674666413] [2024-11-27 23:32:46,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674666413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:46,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:46,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:32:46,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45596599] [2024-11-27 23:32:46,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:46,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:32:46,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:46,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:32:46,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:32:46,279 INFO L87 Difference]: Start difference. First operand 266 states and 348 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 23:32:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:46,596 INFO L93 Difference]: Finished difference Result 273 states and 344 transitions. [2024-11-27 23:32:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:32:46,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 28 [2024-11-27 23:32:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:46,598 INFO L225 Difference]: With dead ends: 273 [2024-11-27 23:32:46,598 INFO L226 Difference]: Without dead ends: 273 [2024-11-27 23:32:46,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:32:46,599 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 66 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:46,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 330 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:32:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-11-27 23:32:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 260. [2024-11-27 23:32:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 198 states have (on average 1.3686868686868687) internal successors, (271), 225 states have internal predecessors, (271), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 23 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-27 23:32:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 339 transitions. [2024-11-27 23:32:46,616 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 339 transitions. Word has length 28 [2024-11-27 23:32:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:46,617 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 339 transitions. [2024-11-27 23:32:46,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 23:32:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 339 transitions. [2024-11-27 23:32:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-27 23:32:46,617 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:46,618 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:46,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-27 23:32:46,619 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:32:46,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:46,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1865554202, now seen corresponding path program 1 times [2024-11-27 23:32:46,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462119157] [2024-11-27 23:32:46,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462119157] [2024-11-27 23:32:47,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462119157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653569959] [2024-11-27 23:32:47,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:47,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:47,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:47,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:32:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:47,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-27 23:32:47,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:47,834 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 23:32:47,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:32:47,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:32:48,006 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-27 23:32:48,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-27 23:32:48,100 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 18 treesize of output 13 [2024-11-27 23:32:48,111 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 18 treesize of output 13 [2024-11-27 23:32:48,137 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 18 treesize of output 13 [2024-11-27 23:32:48,153 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 18 treesize of output 13 [2024-11-27 23:32:48,193 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2024-11-27 23:32:48,193 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 23 treesize of output 22 [2024-11-27 23:32:48,223 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-27 23:32:48,223 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 29 treesize of output 17 [2024-11-27 23:32:49,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:49,114 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 73 treesize of output 69 [2024-11-27 23:32:49,279 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 41 treesize of output 17 [2024-11-27 23:32:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:49,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:49,768 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4))) (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_702 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_702))) (store .cse1 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~tail~0#1.base|) (+ |ULTIMATE.start_main_~tail~0#1.offset| 4) |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base|) .cse2))) (or (= (select |c_#valid| .cse0) 1) (= .cse0 0)))) (forall ((|ULTIMATE.start_main_~tail~0#1.offset| Int) (v_ArrVal_702 (Array Int Int)) (v_ArrVal_701 (Array Int Int))) (let ((.cse4 (+ |ULTIMATE.start_main_~tail~0#1.offset| 4))) (or (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_701))) (store .cse3 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 |c_ULTIMATE.start_main_~n~0#1.offset|))) |c_ULTIMATE.start_main_~x~0#1.base|) .cse2) 0) (= (select |c_#valid| (select (select (let ((.cse5 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_702))) (store .cse5 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base|) .cse2)) 1)))))) is different from false [2024-11-27 23:32:50,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:50,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2024-11-27 23:32:50,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:50,431 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 22 [2024-11-27 23:32:50,436 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 21 treesize of output 17 [2024-11-27 23:32:50,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:50,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-27 23:32:50,449 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 36 treesize of output 24 [2024-11-27 23:32:50,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:50,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2024-11-27 23:32:50,469 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 81 treesize of output 75 [2024-11-27 23:32:50,477 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 28 treesize of output 20 [2024-11-27 23:32:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653569959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:54,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:54,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 35 [2024-11-27 23:32:54,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902225036] [2024-11-27 23:32:54,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:54,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-27 23:32:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:54,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-27 23:32:54,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1068, Unknown=2, NotChecked=66, Total=1260 [2024-11-27 23:32:54,580 INFO L87 Difference]: Start difference. First operand 260 states and 339 transitions. Second operand has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 36 states have internal predecessors, (78), 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 23:33:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:04,178 INFO L93 Difference]: Finished difference Result 456 states and 566 transitions. [2024-11-27 23:33:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 23:33:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 36 states have internal predecessors, (78), 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) Word has length 30 [2024-11-27 23:33:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:04,181 INFO L225 Difference]: With dead ends: 456 [2024-11-27 23:33:04,181 INFO L226 Difference]: Without dead ends: 456 [2024-11-27 23:33:04,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=691, Invalid=2961, Unknown=12, NotChecked=118, Total=3782 [2024-11-27 23:33:04,187 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 1065 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 186 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:04,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 1554 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1728 Invalid, 8 Unknown, 358 Unchecked, 4.9s Time] [2024-11-27 23:33:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2024-11-27 23:33:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 368. [2024-11-27 23:33:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 283 states have (on average 1.3356890459363957) internal successors, (378), 316 states have internal predecessors, (378), 51 states have call successors, (51), 17 states have call predecessors, (51), 17 states have return successors, (51), 34 states have call predecessors, (51), 51 states have call successors, (51) [2024-11-27 23:33:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 480 transitions. [2024-11-27 23:33:04,208 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 480 transitions. Word has length 30 [2024-11-27 23:33:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:04,208 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 480 transitions. [2024-11-27 23:33:04,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 36 states have internal predecessors, (78), 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 23:33:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 480 transitions. [2024-11-27 23:33:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-27 23:33:04,209 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:04,209 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:04,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:04,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-27 23:33:04,414 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:33:04,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1865554203, now seen corresponding path program 1 times [2024-11-27 23:33:04,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:04,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588482407] [2024-11-27 23:33:04,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:04,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:05,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:05,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588482407] [2024-11-27 23:33:05,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588482407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:05,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766451055] [2024-11-27 23:33:05,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:05,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:05,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:05,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:05,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:33:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:05,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:33:05,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:05,691 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 23:33:05,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:33:05,767 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 19 treesize of output 1 [2024-11-27 23:33:06,022 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 21 treesize of output 9 [2024-11-27 23:33:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:06,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:06,293 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 64 [2024-11-27 23:33:06,298 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 94 treesize of output 82 [2024-11-27 23:33:06,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:33:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:33:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766451055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:06,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:33:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 6] total 25 [2024-11-27 23:33:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653054671] [2024-11-27 23:33:06,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:06,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-27 23:33:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:06,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-27 23:33:06,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-11-27 23:33:06,410 INFO L87 Difference]: Start difference. First operand 368 states and 480 transitions. Second operand has 26 states, 25 states have (on average 2.92) internal successors, (73), 26 states have internal predecessors, (73), 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 23:33:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:09,034 INFO L93 Difference]: Finished difference Result 511 states and 634 transitions. [2024-11-27 23:33:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 23:33:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.92) internal successors, (73), 26 states have internal predecessors, (73), 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) Word has length 30 [2024-11-27 23:33:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:09,037 INFO L225 Difference]: With dead ends: 511 [2024-11-27 23:33:09,037 INFO L226 Difference]: Without dead ends: 511 [2024-11-27 23:33:09,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2024-11-27 23:33:09,038 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 747 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:09,038 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1018 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-27 23:33:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-11-27 23:33:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 433. [2024-11-27 23:33:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 332 states have (on average 1.3283132530120483) internal successors, (441), 369 states have internal predecessors, (441), 62 states have call successors, (62), 22 states have call predecessors, (62), 22 states have return successors, (62), 41 states have call predecessors, (62), 62 states have call successors, (62) [2024-11-27 23:33:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 565 transitions. [2024-11-27 23:33:09,057 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 565 transitions. Word has length 30 [2024-11-27 23:33:09,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:09,058 INFO L471 AbstractCegarLoop]: Abstraction has 433 states and 565 transitions. [2024-11-27 23:33:09,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.92) internal successors, (73), 26 states have internal predecessors, (73), 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 23:33:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 565 transitions. [2024-11-27 23:33:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-27 23:33:09,059 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:09,059 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:09,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:09,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-27 23:33:09,263 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:33:09,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:09,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1466035672, now seen corresponding path program 1 times [2024-11-27 23:33:09,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:09,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267419057] [2024-11-27 23:33:09,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:09,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:09,553 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 23:33:09,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:09,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267419057] [2024-11-27 23:33:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267419057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:33:09,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:33:09,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 23:33:09,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026789859] [2024-11-27 23:33:09,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:33:09,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:33:09,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:09,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:33:09,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:33:09,555 INFO L87 Difference]: Start difference. First operand 433 states and 565 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 23:33:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:09,759 INFO L93 Difference]: Finished difference Result 442 states and 573 transitions. [2024-11-27 23:33:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:33:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 31 [2024-11-27 23:33:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:09,762 INFO L225 Difference]: With dead ends: 442 [2024-11-27 23:33:09,762 INFO L226 Difference]: Without dead ends: 442 [2024-11-27 23:33:09,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:33:09,763 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 121 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:09,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 376 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:33:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2024-11-27 23:33:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 433. [2024-11-27 23:33:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 332 states have (on average 1.322289156626506) internal successors, (439), 369 states have internal predecessors, (439), 62 states have call successors, (62), 22 states have call predecessors, (62), 22 states have return successors, (62), 41 states have call predecessors, (62), 62 states have call successors, (62) [2024-11-27 23:33:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 563 transitions. [2024-11-27 23:33:09,784 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 563 transitions. Word has length 31 [2024-11-27 23:33:09,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:09,785 INFO L471 AbstractCegarLoop]: Abstraction has 433 states and 563 transitions. [2024-11-27 23:33:09,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 23:33:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 563 transitions. [2024-11-27 23:33:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 23:33:09,786 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:09,786 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-11-27 23:33:09,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-27 23:33:09,786 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:33:09,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1434940726, now seen corresponding path program 1 times [2024-11-27 23:33:09,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:09,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579092568] [2024-11-27 23:33:09,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:09,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:33:09,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:09,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579092568] [2024-11-27 23:33:09,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579092568] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:33:09,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:33:09,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:33:09,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248295443] [2024-11-27 23:33:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:33:09,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:33:09,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:09,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:33:09,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:33:09,849 INFO L87 Difference]: Start difference. First operand 433 states and 563 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:33:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:09,891 INFO L93 Difference]: Finished difference Result 430 states and 539 transitions. [2024-11-27 23:33:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:33:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-27 23:33:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:09,893 INFO L225 Difference]: With dead ends: 430 [2024-11-27 23:33:09,893 INFO L226 Difference]: Without dead ends: 430 [2024-11-27 23:33:09,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:33:09,894 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 39 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:09,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 262 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:33:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-27 23:33:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 415. [2024-11-27 23:33:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 326 states have (on average 1.3098159509202454) internal successors, (427), 357 states have internal predecessors, (427), 50 states have call successors, (50), 22 states have call predecessors, (50), 22 states have return successors, (50), 35 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-27 23:33:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 527 transitions. [2024-11-27 23:33:09,912 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 527 transitions. Word has length 33 [2024-11-27 23:33:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:09,913 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 527 transitions. [2024-11-27 23:33:09,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:33:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 527 transitions. [2024-11-27 23:33:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-27 23:33:09,914 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:09,914 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:09,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-27 23:33:09,914 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:33:09,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1721518084, now seen corresponding path program 1 times [2024-11-27 23:33:09,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:09,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907946274] [2024-11-27 23:33:09,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:09,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:10,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:10,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907946274] [2024-11-27 23:33:10,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907946274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:10,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057820533] [2024-11-27 23:33:10,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:10,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:10,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:10,258 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:10,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:33:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:10,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-27 23:33:10,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:10,481 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 23:33:10,490 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 23:33:10,531 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 23:33:10,531 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 23:33:10,551 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 23:33:10,552 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 23:33:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:10,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:11,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:11,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2024-11-27 23:33:11,297 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 60 treesize of output 48 [2024-11-27 23:33:11,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:11,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2024-11-27 23:33:11,314 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 38 [2024-11-27 23:33:11,319 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 25 treesize of output 21 [2024-11-27 23:33:11,323 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 21 treesize of output 17 [2024-11-27 23:33:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:11,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057820533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:11,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:33:11,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 27 [2024-11-27 23:33:11,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018741057] [2024-11-27 23:33:11,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:11,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 23:33:11,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:11,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 23:33:11,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=620, Unknown=1, NotChecked=0, Total=702 [2024-11-27 23:33:11,385 INFO L87 Difference]: Start difference. First operand 415 states and 527 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:33:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:13,042 INFO L93 Difference]: Finished difference Result 454 states and 551 transitions. [2024-11-27 23:33:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-27 23:33:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2024-11-27 23:33:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:13,045 INFO L225 Difference]: With dead ends: 454 [2024-11-27 23:33:13,045 INFO L226 Difference]: Without dead ends: 446 [2024-11-27 23:33:13,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=1256, Unknown=1, NotChecked=0, Total=1482 [2024-11-27 23:33:13,046 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 234 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:13,046 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1416 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 23:33:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-11-27 23:33:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 378. [2024-11-27 23:33:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 295 states have (on average 1.2779661016949153) internal successors, (377), 323 states have internal predecessors, (377), 47 states have call successors, (47), 21 states have call predecessors, (47), 21 states have return successors, (47), 33 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-27 23:33:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 471 transitions. [2024-11-27 23:33:13,060 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 471 transitions. Word has length 32 [2024-11-27 23:33:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:13,060 INFO L471 AbstractCegarLoop]: Abstraction has 378 states and 471 transitions. [2024-11-27 23:33:13,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:33:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 471 transitions. [2024-11-27 23:33:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-27 23:33:13,063 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:13,063 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:13,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:13,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-27 23:33:13,264 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:33:13,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2122659452, now seen corresponding path program 1 times [2024-11-27 23:33:13,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:13,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395872611] [2024-11-27 23:33:13,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:13,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:13,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395872611] [2024-11-27 23:33:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395872611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068687081] [2024-11-27 23:33:13,931 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:13,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:13,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:13,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:13,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:33:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:14,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:33:14,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:14,150 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 19 treesize of output 1 [2024-11-27 23:33:14,254 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 23:33:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:14,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:14,303 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 26 [2024-11-27 23:33:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:14,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068687081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:14,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:33:14,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 17 [2024-11-27 23:33:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515001648] [2024-11-27 23:33:14,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:14,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:33:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:14,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:33:14,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:33:14,351 INFO L87 Difference]: Start difference. First operand 378 states and 471 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:33:18,369 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 23:33:22,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:33:26,439 WARN L539 Checker$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 23:33:30,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:33:34,507 WARN L539 Checker$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 23:33:38,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:33:42,809 WARN L539 Checker$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 23:33:46,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:33:51,034 WARN L539 Checker$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 23:33:55,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:33:59,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:03,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:07,134 WARN L539 Checker$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 23:34:11,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:15,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:19,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:23,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:27,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:31,396 WARN L539 Checker$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 23:34:35,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:39,448 WARN L539 Checker$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 23:34:43,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:47,503 WARN L539 Checker$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 23:34:51,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:34:55,535 WARN L539 Checker$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 23:34:59,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:35:03,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:35:07,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:35:11,608 WARN L539 Checker$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 23:35:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:11,709 INFO L93 Difference]: Finished difference Result 409 states and 479 transitions. [2024-11-27 23:35:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 23:35:11,710 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-27 23:35:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:11,711 INFO L225 Difference]: With dead ends: 409 [2024-11-27 23:35:11,711 INFO L226 Difference]: Without dead ends: 409 [2024-11-27 23:35:11,712 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:35:11,712 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 326 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 42 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:11,712 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1106 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 806 Invalid, 29 Unknown, 0 Unchecked, 116.9s Time] [2024-11-27 23:35:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-27 23:35:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 297. [2024-11-27 23:35:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 228 states have (on average 1.280701754385965) internal successors, (292), 252 states have internal predecessors, (292), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 26 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-27 23:35:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 364 transitions. [2024-11-27 23:35:11,723 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 364 transitions. Word has length 32 [2024-11-27 23:35:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:11,723 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 364 transitions. [2024-11-27 23:35:11,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:35:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 364 transitions. [2024-11-27 23:35:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 23:35:11,724 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:11,724 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:11,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 23:35:11,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-27 23:35:11,925 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:35:11,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash 118678117, now seen corresponding path program 1 times [2024-11-27 23:35:11,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:35:11,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74085549] [2024-11-27 23:35:11,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:11,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:35:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:12,107 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 23:35:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:35:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74085549] [2024-11-27 23:35:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74085549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:35:12,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:35:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:35:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833389969] [2024-11-27 23:35:12,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:35:12,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:35:12,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:35:12,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:35:12,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:35:12,109 INFO L87 Difference]: Start difference. First operand 297 states and 364 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 23:35:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:35:12,375 INFO L93 Difference]: Finished difference Result 311 states and 372 transitions. [2024-11-27 23:35:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:35:12,375 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), 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 33 [2024-11-27 23:35:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:35:12,377 INFO L225 Difference]: With dead ends: 311 [2024-11-27 23:35:12,377 INFO L226 Difference]: Without dead ends: 311 [2024-11-27 23:35:12,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:35:12,378 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 32 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:35:12,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 372 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:35:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-27 23:35:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 297. [2024-11-27 23:35:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 252 states have internal predecessors, (287), 36 states have call successors, (36), 18 states have call predecessors, (36), 18 states have return successors, (36), 26 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-27 23:35:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 359 transitions. [2024-11-27 23:35:12,387 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 359 transitions. Word has length 33 [2024-11-27 23:35:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:35:12,387 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 359 transitions. [2024-11-27 23:35:12,387 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), 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 23:35:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 359 transitions. [2024-11-27 23:35:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 23:35:12,388 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:35:12,388 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:35:12,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-27 23:35:12,388 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:35:12,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:35:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash 420357543, now seen corresponding path program 1 times [2024-11-27 23:35:12,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:35:12,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257118333] [2024-11-27 23:35:12,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:12,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:35:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:35:13,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:35:13,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257118333] [2024-11-27 23:35:13,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257118333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:35:13,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250324509] [2024-11-27 23:35:13,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:35:13,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:13,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:13,418 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:13,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:35:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:13,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-27 23:35:13,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:13,587 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 23:35:13,612 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 23:35:13,621 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 23:35:13,660 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 23:35:13,667 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 20 [2024-11-27 23:35:13,828 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:35:13,828 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 23:35:13,905 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 23:35:13,920 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 25 treesize of output 18 [2024-11-27 23:35:13,936 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 25 treesize of output 18 [2024-11-27 23:35:13,952 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 23:35:13,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:35:14,008 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-27 23:35:14,009 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 36 treesize of output 27 [2024-11-27 23:35:14,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:35:14,018 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 11 [2024-11-27 23:35:26,820 INFO L349 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2024-11-27 23:35:26,820 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 65 [2024-11-27 23:35:26,907 INFO L349 Elim1Store]: treesize reduction 64, result has 50.0 percent of original size [2024-11-27 23:35:26,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 90 [2024-11-27 23:35:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:35:31,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:31,912 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~tail~0#1.offset| 4))) (and (forall ((|ULTIMATE.start_main_~n~0#1.offset| Int) (v_ArrVal_1050 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_1050))) (store .cse0 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse1 |ULTIMATE.start_main_~n~0#1.offset|))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0)) (forall ((v_ArrVal_1051 (Array Int Int))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~n~0#1.base| v_ArrVal_1051))) (store .cse2 |c_ULTIMATE.start_main_~tail~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~tail~0#1.base|) .cse1 |c_ULTIMATE.start_main_~n~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) 0)))) is different from false [2024-11-27 23:35:38,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:35:38,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2024-11-27 23:35:38,420 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 22 [2024-11-27 23:35:38,430 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-27 23:35:38,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 1 [2024-11-27 23:35:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:35:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250324509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:35:42,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:35:42,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 31 [2024-11-27 23:35:42,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618593874] [2024-11-27 23:35:42,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:35:42,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 23:35:42,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:35:42,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 23:35:42,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=741, Unknown=8, NotChecked=56, Total=930 [2024-11-27 23:35:42,437 INFO L87 Difference]: Start difference. First operand 297 states and 359 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:35:46,497 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 23:35:54,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:36:02,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:36:07,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:36:11,165 WARN L539 Checker$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 23:36:15,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:36:23,252 WARN L539 Checker$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 23:36:28,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:36:32,051 WARN L539 Checker$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 23:36:36,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:36:40,076 WARN L539 Checker$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 23:36:48,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:36:52,202 WARN L539 Checker$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 23:37:07,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:11,108 WARN L539 Checker$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 23:37:24,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:28,393 WARN L539 Checker$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 23:37:40,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:44,619 WARN L539 Checker$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 23:37:48,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:37:52,751 WARN L539 Checker$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 23:37:57,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:01,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:05,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:09,841 WARN L539 Checker$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 23:38:13,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:17,866 WARN L539 Checker$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 23:38:32,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:36,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:40,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:38:56,546 WARN L539 Checker$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 23:39:00,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:39:04,565 WARN L539 Checker$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 23:39:08,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:39:12,599 WARN L539 Checker$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 23:39:16,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:39:21,535 WARN L539 Checker$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 23:39:25,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:39:29,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:39:33,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 23:39:37,618 WARN L539 Checker$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 23:39:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:37,848 INFO L93 Difference]: Finished difference Result 323 states and 373 transitions. [2024-11-27 23:39:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 23:39:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2024-11-27 23:39:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:37,850 INFO L225 Difference]: With dead ends: 323 [2024-11-27 23:39:37,850 INFO L226 Difference]: Without dead ends: 323 [2024-11-27 23:39:37,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 95.7s TimeCoverageRelationStatistics Valid=433, Invalid=1529, Unknown=22, NotChecked=86, Total=2070 [2024-11-27 23:39:37,852 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 385 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 79 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 167.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:37,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1089 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 950 Invalid, 40 Unknown, 196 Unchecked, 167.2s Time] [2024-11-27 23:39:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-27 23:39:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 288. [2024-11-27 23:39:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 220 states have (on average 1.25) internal successors, (275), 244 states have internal predecessors, (275), 35 states have call successors, (35), 18 states have call predecessors, (35), 18 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-27 23:39:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 345 transitions. [2024-11-27 23:39:37,864 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 345 transitions. Word has length 35 [2024-11-27 23:39:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:37,864 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 345 transitions. [2024-11-27 23:39:37,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:39:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 345 transitions. [2024-11-27 23:39:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-27 23:39:37,866 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:37,866 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:37,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 23:39:38,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-27 23:39:38,067 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:39:38,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash -521987963, now seen corresponding path program 1 times [2024-11-27 23:39:38,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:38,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990601729] [2024-11-27 23:39:38,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:38,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:38,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990601729] [2024-11-27 23:39:38,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990601729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:38,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114006778] [2024-11-27 23:39:38,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:38,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:38,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:38,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:39:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:38,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-27 23:39:38,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:39,018 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 23:39:39,074 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 23:39:39,102 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:39:39,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2024-11-27 23:39:40,307 INFO L349 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2024-11-27 23:39:40,307 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 68 treesize of output 64 [2024-11-27 23:39:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:40,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:40,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114006778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:40,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:39:40,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2024-11-27 23:39:40,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154217190] [2024-11-27 23:39:40,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:40,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:39:40,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:40,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:39:40,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2024-11-27 23:39:40,511 INFO L87 Difference]: Start difference. First operand 288 states and 345 transitions. Second operand has 28 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:39:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:43,893 INFO L93 Difference]: Finished difference Result 386 states and 448 transitions. [2024-11-27 23:39:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-27 23:39:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-11-27 23:39:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:43,896 INFO L225 Difference]: With dead ends: 386 [2024-11-27 23:39:43,896 INFO L226 Difference]: Without dead ends: 386 [2024-11-27 23:39:43,897 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2024-11-27 23:39:43,898 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 427 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:43,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 1426 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-27 23:39:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2024-11-27 23:39:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 309. [2024-11-27 23:39:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 236 states have (on average 1.2584745762711864) internal successors, (297), 260 states have internal predecessors, (297), 37 states have call successors, (37), 21 states have call predecessors, (37), 21 states have return successors, (37), 27 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-27 23:39:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 371 transitions. [2024-11-27 23:39:43,911 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 371 transitions. Word has length 41 [2024-11-27 23:39:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:43,911 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 371 transitions. [2024-11-27 23:39:43,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:39:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 371 transitions. [2024-11-27 23:39:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-27 23:39:43,912 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:43,913 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:43,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:44,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:44,117 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:39:44,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:44,119 INFO L85 PathProgramCache]: Analyzing trace with hash -521987962, now seen corresponding path program 1 times [2024-11-27 23:39:44,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:44,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619968050] [2024-11-27 23:39:44,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:44,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619968050] [2024-11-27 23:39:44,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619968050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581545132] [2024-11-27 23:39:44,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:44,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:44,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:44,946 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:44,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:39:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:45,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-27 23:39:45,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:45,156 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 23:39:45,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:39:45,275 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 23:39:45,323 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 23:39:45,332 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 23:39:45,391 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 23:39:45,398 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 11 [2024-11-27 23:39:45,419 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:39:45,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2024-11-27 23:39:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:39:45,431 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 11 [2024-11-27 23:39:46,655 INFO L349 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2024-11-27 23:39:46,655 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 81 treesize of output 71 [2024-11-27 23:39:46,681 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 23:39:46,682 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 7 [2024-11-27 23:39:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:39:46,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:47,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581545132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:47,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:39:47,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 27 [2024-11-27 23:39:47,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706120798] [2024-11-27 23:39:47,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:47,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:39:47,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:47,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:39:47,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2024-11-27 23:39:47,167 INFO L87 Difference]: Start difference. First operand 309 states and 371 transitions. Second operand has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:39:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:52,634 INFO L93 Difference]: Finished difference Result 513 states and 621 transitions. [2024-11-27 23:39:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-27 23:39:52,634 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-11-27 23:39:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:52,637 INFO L225 Difference]: With dead ends: 513 [2024-11-27 23:39:52,637 INFO L226 Difference]: Without dead ends: 513 [2024-11-27 23:39:52,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=496, Invalid=3164, Unknown=0, NotChecked=0, Total=3660 [2024-11-27 23:39:52,639 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 523 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:52,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1463 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-27 23:39:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-11-27 23:39:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 361. [2024-11-27 23:39:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 276 states have (on average 1.2753623188405796) internal successors, (352), 302 states have internal predecessors, (352), 43 states have call successors, (43), 25 states have call predecessors, (43), 28 states have return successors, (52), 33 states have call predecessors, (52), 43 states have call successors, (52) [2024-11-27 23:39:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 447 transitions. [2024-11-27 23:39:52,654 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 447 transitions. Word has length 41 [2024-11-27 23:39:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:52,654 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 447 transitions. [2024-11-27 23:39:52,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:39:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 447 transitions. [2024-11-27 23:39:52,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:39:52,655 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:52,655 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:52,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:52,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:52,860 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:39:52,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash -741435874, now seen corresponding path program 1 times [2024-11-27 23:39:52,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:52,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512893495] [2024-11-27 23:39:52,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:52,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:39:52,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:52,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512893495] [2024-11-27 23:39:52,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512893495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:39:52,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:39:52,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:39:52,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607952575] [2024-11-27 23:39:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:39:52,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:39:52,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:52,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:39:52,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:39:52,962 INFO L87 Difference]: Start difference. First operand 361 states and 447 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:39:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:53,011 INFO L93 Difference]: Finished difference Result 375 states and 464 transitions. [2024-11-27 23:39:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:39:53,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 23:39:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:53,013 INFO L225 Difference]: With dead ends: 375 [2024-11-27 23:39:53,014 INFO L226 Difference]: Without dead ends: 375 [2024-11-27 23:39:53,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:39:53,015 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 3 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:53,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 439 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:39:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-27 23:39:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 366. [2024-11-27 23:39:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 279 states have (on average 1.2724014336917562) internal successors, (355), 305 states have internal predecessors, (355), 44 states have call successors, (44), 26 states have call predecessors, (44), 29 states have return successors, (53), 34 states have call predecessors, (53), 44 states have call successors, (53) [2024-11-27 23:39:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 452 transitions. [2024-11-27 23:39:53,034 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 452 transitions. Word has length 43 [2024-11-27 23:39:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:53,034 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 452 transitions. [2024-11-27 23:39:53,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:39:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 452 transitions. [2024-11-27 23:39:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:39:53,036 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:53,036 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:53,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-27 23:39:53,036 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:39:53,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:53,037 INFO L85 PathProgramCache]: Analyzing trace with hash -904827827, now seen corresponding path program 1 times [2024-11-27 23:39:53,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:53,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601749403] [2024-11-27 23:39:53,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:53,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:39:54,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:54,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601749403] [2024-11-27 23:39:54,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601749403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:54,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024439768] [2024-11-27 23:39:54,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:39:54,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:54,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:54,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:54,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:39:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:54,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-27 23:39:54,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:55,059 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:39:55,059 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 23:39:55,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:39:55,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:39:55,215 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 23:39:55,227 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 33 treesize of output 17 [2024-11-27 23:39:55,880 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2024-11-27 23:39:55,881 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 53 treesize of output 27 [2024-11-27 23:39:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:39:55,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:56,460 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 738 treesize of output 726 [2024-11-27 23:39:57,173 INFO L349 Elim1Store]: treesize reduction 210, result has 54.9 percent of original size [2024-11-27 23:39:57,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 6395 treesize of output 5736 [2024-11-27 23:40:01,900 INFO L349 Elim1Store]: treesize reduction 145, result has 12.7 percent of original size [2024-11-27 23:40:01,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 3641 treesize of output 2801 [2024-11-27 23:40:02,051 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 2687 treesize of output 2555 [2024-11-27 23:40:08,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:40:08,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 232 [2024-11-27 23:40:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:40:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024439768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:40:09,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:40:09,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 13] total 41 [2024-11-27 23:40:09,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591904446] [2024-11-27 23:40:09,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:40:09,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-27 23:40:09,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:40:09,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-27 23:40:09,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2024-11-27 23:40:09,093 INFO L87 Difference]: Start difference. First operand 366 states and 452 transitions. Second operand has 41 states, 38 states have (on average 2.736842105263158) internal successors, (104), 35 states have internal predecessors, (104), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:40:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:40:14,457 INFO L93 Difference]: Finished difference Result 472 states and 554 transitions. [2024-11-27 23:40:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 23:40:14,458 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.736842105263158) internal successors, (104), 35 states have internal predecessors, (104), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-27 23:40:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:40:14,460 INFO L225 Difference]: With dead ends: 472 [2024-11-27 23:40:14,460 INFO L226 Difference]: Without dead ends: 472 [2024-11-27 23:40:14,462 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=576, Invalid=3980, Unknown=0, NotChecked=0, Total=4556 [2024-11-27 23:40:14,462 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 413 mSDsluCounter, 2752 mSDsCounter, 0 mSdLazyCounter, 2844 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 2899 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:40:14,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 2899 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2844 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-27 23:40:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2024-11-27 23:40:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 354. [2024-11-27 23:40:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 270 states have (on average 1.262962962962963) internal successors, (341), 296 states have internal predecessors, (341), 42 states have call successors, (42), 25 states have call predecessors, (42), 28 states have return successors, (51), 32 states have call predecessors, (51), 42 states have call successors, (51) [2024-11-27 23:40:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 434 transitions. [2024-11-27 23:40:14,474 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 434 transitions. Word has length 43 [2024-11-27 23:40:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:40:14,474 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 434 transitions. [2024-11-27 23:40:14,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.736842105263158) internal successors, (104), 35 states have internal predecessors, (104), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:40:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 434 transitions. [2024-11-27 23:40:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 23:40:14,475 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:40:14,475 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:40:14,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 23:40:14,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:14,676 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_LEAK === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:40:14,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:40:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1497263679, now seen corresponding path program 1 times [2024-11-27 23:40:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:40:14,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455501963] [2024-11-27 23:40:14,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:40:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:40:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:40:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:40:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:40:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455501963] [2024-11-27 23:40:14,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455501963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:40:14,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:40:14,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:40:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891659507] [2024-11-27 23:40:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:40:14,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:40:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:40:14,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:40:14,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:40:14,761 INFO L87 Difference]: Start difference. First operand 354 states and 434 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:40:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:40:14,938 INFO L93 Difference]: Finished difference Result 358 states and 438 transitions. [2024-11-27 23:40:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:40:14,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-27 23:40:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:40:14,941 INFO L225 Difference]: With dead ends: 358 [2024-11-27 23:40:14,941 INFO L226 Difference]: Without dead ends: 329 [2024-11-27 23:40:14,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:40:14,942 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 1 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:40:14,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 190 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:40:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-11-27 23:40:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2024-11-27 23:40:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 249 states have (on average 1.2811244979919678) internal successors, (319), 274 states have internal predecessors, (319), 39 states have call successors, (39), 23 states have call predecessors, (39), 26 states have return successors, (48), 30 states have call predecessors, (48), 39 states have call successors, (48) [2024-11-27 23:40:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 406 transitions. [2024-11-27 23:40:14,956 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 406 transitions. Word has length 44 [2024-11-27 23:40:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:40:14,956 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 406 transitions. [2024-11-27 23:40:14,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-27 23:40:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 406 transitions. [2024-11-27 23:40:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 23:40:14,957 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:40:14,957 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:40:14,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-27 23:40:14,958 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [is_list_containing_xErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, is_list_containing_xErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-27 23:40:14,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:40:14,958 INFO L85 PathProgramCache]: Analyzing trace with hash -442603651, now seen corresponding path program 1 times [2024-11-27 23:40:14,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:40:14,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512812065] [2024-11-27 23:40:14,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:40:14,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:40:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:40:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:40:15,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:40:15,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512812065] [2024-11-27 23:40:15,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512812065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:40:15,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889427560] [2024-11-27 23:40:15,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:40:15,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:40:15,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:40:15,822 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:40:15,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d855e7d0-fbf7-40d9-82f7-e7ee93f24cc1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:40:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:40:16,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-27 23:40:16,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:40:16,116 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 23:40:16,202 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 19 treesize of output 1 [2024-11-27 23:40:16,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:40:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:40:16,684 INFO L349 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2024-11-27 23:40:16,684 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 39 [2024-11-27 23:40:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:40:16,744 INFO L349 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2024-11-27 23:40:16,745 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2024-11-27 23:40:18,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:40:18,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 214 [2024-11-27 23:41:12,682 WARN L286 SmtUtils]: Spent 19.23s on a formula simplification that was a NOOP. DAG size: 1205 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 23:41:12,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:41:12,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 253 case distinctions, treesize of input 500 treesize of output 3102