./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.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_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/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_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/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_6952eff0-5295-4372-9005-04f2d044f4cc/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 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:29:15,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:29:15,513 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:29:15,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:29:15,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:29:15,550 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:29:15,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:29:15,551 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:29:15,551 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:29:15,551 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:29:15,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:29:15,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:29:15,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:29:15,552 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:29:15,552 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:29:15,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:29:15,552 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:29:15,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:29:15,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:29:15,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:29:15,553 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:29:15,553 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:29:15,553 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:29:15,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:29:15,553 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:29:15,553 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:29:15,554 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:29:15,554 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:29:15,554 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:29:15,554 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:29:15,554 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:29:15,554 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:29:15,554 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:29:15,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:29:15,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:29:15,555 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:29:15,555 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:29:15,556 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_6952eff0-5295-4372-9005-04f2d044f4cc/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 -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2024-11-27 20:29:15,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:29:15,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:29:15,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:29:15,889 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:29:15,890 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:29:15,891 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2024-11-27 20:29:19,082 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/data/f5c2d4edd/897cb9f30cb44461ad4456837196981d/FLAG43ba2dec8 [2024-11-27 20:29:19,505 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:29:19,506 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2024-11-27 20:29:19,528 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/data/f5c2d4edd/897cb9f30cb44461ad4456837196981d/FLAG43ba2dec8 [2024-11-27 20:29:19,550 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/data/f5c2d4edd/897cb9f30cb44461ad4456837196981d [2024-11-27 20:29:19,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:29:19,555 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:29:19,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:29:19,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:29:19,562 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:29:19,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:29:19" (1/1) ... [2024-11-27 20:29:19,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f8fe593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:19, skipping insertion in model container [2024-11-27 20:29:19,565 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:29:19" (1/1) ... [2024-11-27 20:29:19,601 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:29:19,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:29:19,997 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:29:20,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:29:20,088 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:29:20,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20 WrapperNode [2024-11-27 20:29:20,089 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:29:20,090 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:29:20,090 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:29:20,090 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:29:20,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,167 INFO L138 Inliner]: procedures = 129, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 200 [2024-11-27 20:29:20,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:29:20,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:29:20,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:29:20,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:29:20,180 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,184 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,230 INFO L175 MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 6, 8, 18, 8]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0, 0]. The 10 writes are split as follows [0, 1, 1, 7, 1]. [2024-11-27 20:29:20,230 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,230 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,257 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,265 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,269 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:29:20,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:29:20,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:29:20,274 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:29:20,275 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (1/1) ... [2024-11-27 20:29:20,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:29:20,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:29:20,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:29:20,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:29:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2024-11-27 20:29:20,359 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2024-11-27 20:29:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:29:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:29:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 20:29:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-27 20:29:20,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-27 20:29:20,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-27 20:29:20,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2024-11-27 20:29:20,361 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-27 20:29:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2024-11-27 20:29:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-27 20:29:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2024-11-27 20:29:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2024-11-27 20:29:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:29:20,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:29:20,543 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:29:20,545 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:29:21,298 INFO L? ?]: Removed 194 outVars from TransFormulas that were not future-live. [2024-11-27 20:29:21,299 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:29:21,328 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:29:21,331 INFO L312 CfgBuilder]: Removed 21 assume(true) statements. [2024-11-27 20:29:21,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:29:21 BoogieIcfgContainer [2024-11-27 20:29:21,332 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:29:21,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:29:21,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:29:21,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:29:21,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:29:19" (1/3) ... [2024-11-27 20:29:21,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f3b8ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:29:21, skipping insertion in model container [2024-11-27 20:29:21,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:29:20" (2/3) ... [2024-11-27 20:29:21,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f3b8ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:29:21, skipping insertion in model container [2024-11-27 20:29:21,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:29:21" (3/3) ... [2024-11-27 20:29:21,352 INFO L128 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2024-11-27 20:29:21,375 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:29:21,379 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_to_dll_rev-2.i that has 5 procedures, 225 locations, 1 initial locations, 21 loop locations, and 83 error locations. [2024-11-27 20:29:21,453 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:29:21,478 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;@892ef9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:29:21,478 INFO L334 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2024-11-27 20:29:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 123 states have (on average 2.073170731707317) internal successors, (255), 211 states have internal predecessors, (255), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-27 20:29:21,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-27 20:29:21,493 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:21,494 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-27 20:29:21,495 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:21,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash 6836454, now seen corresponding path program 1 times [2024-11-27 20:29:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:21,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628655012] [2024-11-27 20:29:21,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:21,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628655012] [2024-11-27 20:29:21,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628655012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:21,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:21,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:29:21,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247116585] [2024-11-27 20:29:21,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:21,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:29:21,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:21,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:29:21,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:29:21,796 INFO L87 Difference]: Start difference. First operand has 225 states, 123 states have (on average 2.073170731707317) internal successors, (255), 211 states have internal predecessors, (255), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 20:29:21,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:21,833 INFO L93 Difference]: Finished difference Result 222 states and 243 transitions. [2024-11-27 20:29:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:29:21,836 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2024-11-27 20:29:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:21,846 INFO L225 Difference]: With dead ends: 222 [2024-11-27 20:29:21,846 INFO L226 Difference]: Without dead ends: 220 [2024-11-27 20:29:21,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:29:21,852 INFO L435 NwaCegarLoop]: 243 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:21,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:29:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-27 20:29:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2024-11-27 20:29:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 117 states have (on average 1.8376068376068375) internal successors, (215), 206 states have internal predecessors, (215), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2024-11-27 20:29:21,914 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 4 [2024-11-27 20:29:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:21,915 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2024-11-27 20:29:21,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 20:29:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2024-11-27 20:29:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-27 20:29:21,915 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:21,915 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:29:21,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:29:21,916 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:21,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2011247481, now seen corresponding path program 1 times [2024-11-27 20:29:21,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:21,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482438188] [2024-11-27 20:29:21,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:22,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482438188] [2024-11-27 20:29:22,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482438188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:22,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:22,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:29:22,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830345732] [2024-11-27 20:29:22,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:22,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:29:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:22,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:29:22,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:29:22,099 INFO L87 Difference]: Start difference. First operand 220 states and 241 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:29:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:22,379 INFO L93 Difference]: Finished difference Result 218 states and 239 transitions. [2024-11-27 20:29:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:29:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-11-27 20:29:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:22,382 INFO L225 Difference]: With dead ends: 218 [2024-11-27 20:29:22,382 INFO L226 Difference]: Without dead ends: 218 [2024-11-27 20:29:22,382 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 20:29:22,384 INFO L435 NwaCegarLoop]: 233 mSDtfsCounter, 2 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:22,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:29:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-27 20:29:22,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-11-27 20:29:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 117 states have (on average 1.8205128205128205) internal successors, (213), 204 states have internal predecessors, (213), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 239 transitions. [2024-11-27 20:29:22,402 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 239 transitions. Word has length 6 [2024-11-27 20:29:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:22,402 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 239 transitions. [2024-11-27 20:29:22,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:29:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 239 transitions. [2024-11-27 20:29:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-27 20:29:22,403 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:22,403 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:29:22,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:29:22,404 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:22,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:22,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2011247480, now seen corresponding path program 1 times [2024-11-27 20:29:22,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:22,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011392486] [2024-11-27 20:29:22,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:22,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:22,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:22,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011392486] [2024-11-27 20:29:22,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011392486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:22,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:22,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:29:22,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326294873] [2024-11-27 20:29:22,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:22,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:29:22,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:22,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:29:22,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:29:22,588 INFO L87 Difference]: Start difference. First operand 218 states and 239 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:29:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:22,800 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2024-11-27 20:29:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:29:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-11-27 20:29:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:22,802 INFO L225 Difference]: With dead ends: 216 [2024-11-27 20:29:22,803 INFO L226 Difference]: Without dead ends: 216 [2024-11-27 20:29:22,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:29:22,804 INFO L435 NwaCegarLoop]: 233 mSDtfsCounter, 2 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:22,804 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 388 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:29:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-27 20:29:22,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2024-11-27 20:29:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 117 states have (on average 1.8034188034188035) internal successors, (211), 202 states have internal predecessors, (211), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2024-11-27 20:29:22,845 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 6 [2024-11-27 20:29:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:22,845 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2024-11-27 20:29:22,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:29:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2024-11-27 20:29:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 20:29:22,847 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:22,847 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:22,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 20:29:22,848 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:22,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1958881301, now seen corresponding path program 1 times [2024-11-27 20:29:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:22,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501155570] [2024-11-27 20:29:22,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:22,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:23,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:23,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501155570] [2024-11-27 20:29:23,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501155570] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:23,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:23,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:29:23,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073560660] [2024-11-27 20:29:23,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:23,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:29:23,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:23,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:29:23,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:29:23,286 INFO L87 Difference]: Start difference. First operand 216 states and 237 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:29:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:23,758 INFO L93 Difference]: Finished difference Result 211 states and 232 transitions. [2024-11-27 20:29:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:29:23,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 10 [2024-11-27 20:29:23,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:23,760 INFO L225 Difference]: With dead ends: 211 [2024-11-27 20:29:23,760 INFO L226 Difference]: Without dead ends: 211 [2024-11-27 20:29:23,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:29:23,762 INFO L435 NwaCegarLoop]: 209 mSDtfsCounter, 40 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:23,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 747 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:29:23,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-27 20:29:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-11-27 20:29:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 117 states have (on average 1.7606837606837606) internal successors, (206), 197 states have internal predecessors, (206), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 232 transitions. [2024-11-27 20:29:23,792 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 232 transitions. Word has length 10 [2024-11-27 20:29:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:23,792 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 232 transitions. [2024-11-27 20:29:23,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:29:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 232 transitions. [2024-11-27 20:29:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 20:29:23,793 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:23,793 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:23,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:29:23,794 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:23,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:23,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1958881300, now seen corresponding path program 1 times [2024-11-27 20:29:23,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:23,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689219168] [2024-11-27 20:29:23,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:23,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:24,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689219168] [2024-11-27 20:29:24,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689219168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:24,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:24,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:29:24,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673402010] [2024-11-27 20:29:24,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:24,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:29:24,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:24,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:29:24,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:29:24,253 INFO L87 Difference]: Start difference. First operand 211 states and 232 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:29:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:24,754 INFO L93 Difference]: Finished difference Result 206 states and 227 transitions. [2024-11-27 20:29:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:29:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2024-11-27 20:29:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:24,756 INFO L225 Difference]: With dead ends: 206 [2024-11-27 20:29:24,757 INFO L226 Difference]: Without dead ends: 206 [2024-11-27 20:29:24,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:29:24,758 INFO L435 NwaCegarLoop]: 207 mSDtfsCounter, 36 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:24,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 550 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:29:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-27 20:29:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-11-27 20:29:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 117 states have (on average 1.7179487179487178) internal successors, (201), 192 states have internal predecessors, (201), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 227 transitions. [2024-11-27 20:29:24,776 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 227 transitions. Word has length 10 [2024-11-27 20:29:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:24,776 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 227 transitions. [2024-11-27 20:29:24,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:29:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 227 transitions. [2024-11-27 20:29:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-27 20:29:24,778 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:24,779 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:24,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:29:24,779 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:24,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash -595778198, now seen corresponding path program 1 times [2024-11-27 20:29:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:24,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168847146] [2024-11-27 20:29:24,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:24,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:24,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168847146] [2024-11-27 20:29:24,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168847146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:24,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:24,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:29:24,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861856490] [2024-11-27 20:29:24,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:24,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:29:24,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:24,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:29:24,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:29:24,923 INFO L87 Difference]: Start difference. First operand 206 states and 227 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 20:29:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:25,235 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2024-11-27 20:29:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:29:25,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 20:29:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:25,239 INFO L225 Difference]: With dead ends: 205 [2024-11-27 20:29:25,239 INFO L226 Difference]: Without dead ends: 205 [2024-11-27 20:29:25,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:29:25,240 INFO L435 NwaCegarLoop]: 217 mSDtfsCounter, 3 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:25,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 648 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:29:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-27 20:29:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-27 20:29:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 117 states have (on average 1.7094017094017093) internal successors, (200), 191 states have internal predecessors, (200), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2024-11-27 20:29:25,252 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 11 [2024-11-27 20:29:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:25,252 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2024-11-27 20:29:25,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 20:29:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2024-11-27 20:29:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-27 20:29:25,253 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:25,253 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:25,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 20:29:25,253 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:25,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash -595778197, now seen corresponding path program 1 times [2024-11-27 20:29:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:25,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503852852] [2024-11-27 20:29:25,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:25,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:25,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503852852] [2024-11-27 20:29:25,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503852852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:25,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:25,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:29:25,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752168122] [2024-11-27 20:29:25,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:25,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:29:25,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:25,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:29:25,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:29:25,480 INFO L87 Difference]: Start difference. First operand 205 states and 226 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 20:29:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:25,720 INFO L93 Difference]: Finished difference Result 204 states and 225 transitions. [2024-11-27 20:29:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:29:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 20:29:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:25,722 INFO L225 Difference]: With dead ends: 204 [2024-11-27 20:29:25,722 INFO L226 Difference]: Without dead ends: 204 [2024-11-27 20:29:25,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:29:25,724 INFO L435 NwaCegarLoop]: 217 mSDtfsCounter, 4 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:25,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 730 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:29:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-27 20:29:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2024-11-27 20:29:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 117 states have (on average 1.7008547008547008) internal successors, (199), 190 states have internal predecessors, (199), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 225 transitions. [2024-11-27 20:29:25,734 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 225 transitions. Word has length 11 [2024-11-27 20:29:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:25,734 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 225 transitions. [2024-11-27 20:29:25,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 20:29:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 225 transitions. [2024-11-27 20:29:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-27 20:29:25,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:25,735 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:25,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 20:29:25,736 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:25,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:25,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1165137319, now seen corresponding path program 1 times [2024-11-27 20:29:25,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:25,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725848839] [2024-11-27 20:29:25,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:25,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:26,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725848839] [2024-11-27 20:29:26,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725848839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:26,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:26,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:29:26,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101817920] [2024-11-27 20:29:26,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:26,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:29:26,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:26,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:29:26,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:29:26,233 INFO L87 Difference]: Start difference. First operand 204 states and 225 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:29:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:27,014 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2024-11-27 20:29:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:29:27,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 19 [2024-11-27 20:29:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:27,016 INFO L225 Difference]: With dead ends: 203 [2024-11-27 20:29:27,016 INFO L226 Difference]: Without dead ends: 203 [2024-11-27 20:29:27,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:29:27,017 INFO L435 NwaCegarLoop]: 161 mSDtfsCounter, 146 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:27,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 495 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:29:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-27 20:29:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2024-11-27 20:29:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 117 states have (on average 1.6923076923076923) internal successors, (198), 189 states have internal predecessors, (198), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 224 transitions. [2024-11-27 20:29:27,026 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 224 transitions. Word has length 19 [2024-11-27 20:29:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:27,027 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 224 transitions. [2024-11-27 20:29:27,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:29:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 224 transitions. [2024-11-27 20:29:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-27 20:29:27,028 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:27,028 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:27,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 20:29:27,029 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:27,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1165137318, now seen corresponding path program 1 times [2024-11-27 20:29:27,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:27,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296134309] [2024-11-27 20:29:27,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:27,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:27,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:27,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296134309] [2024-11-27 20:29:27,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296134309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:27,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:27,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:29:27,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673062674] [2024-11-27 20:29:27,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:27,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:29:27,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:27,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:29:27,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:29:27,446 INFO L87 Difference]: Start difference. First operand 203 states and 224 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:29:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:28,166 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2024-11-27 20:29:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:29:28,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 19 [2024-11-27 20:29:28,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:28,168 INFO L225 Difference]: With dead ends: 202 [2024-11-27 20:29:28,169 INFO L226 Difference]: Without dead ends: 202 [2024-11-27 20:29:28,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:29:28,170 INFO L435 NwaCegarLoop]: 161 mSDtfsCounter, 55 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:28,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 593 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:29:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-27 20:29:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2024-11-27 20:29:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 117 states have (on average 1.6837606837606838) internal successors, (197), 188 states have internal predecessors, (197), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 223 transitions. [2024-11-27 20:29:28,178 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 223 transitions. Word has length 19 [2024-11-27 20:29:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:28,178 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 223 transitions. [2024-11-27 20:29:28,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:29:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 223 transitions. [2024-11-27 20:29:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 20:29:28,179 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:28,179 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:28,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 20:29:28,180 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:28,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1528030111, now seen corresponding path program 1 times [2024-11-27 20:29:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:28,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683661161] [2024-11-27 20:29:28,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:29:28,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683661161] [2024-11-27 20:29:28,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683661161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:28,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361893995] [2024-11-27 20:29:28,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:28,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:29:28,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:29:28,912 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:29:28,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:29:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:29,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 20:29:29,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:29:29,209 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-27 20:29:29,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2024-11-27 20:29:29,262 INFO L349 Elim1Store]: treesize reduction 37, result has 7.5 percent of original size [2024-11-27 20:29:29,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 11 [2024-11-27 20:29:29,300 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (= (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|) 0) (= |c_#valid| (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#valid| |chain_node_alloc_node_~ptr~0#1.base|))))) is different from true [2024-11-27 20:29:29,514 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2024-11-27 20:29:29,515 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 23 treesize of output 28 [2024-11-27 20:29:29,667 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1))) is different from true [2024-11-27 20:29:29,706 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-27 20:29:29,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2024-11-27 20:29:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2024-11-27 20:29:29,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:29:30,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361893995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:30,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:29:30,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-27 20:29:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459912414] [2024-11-27 20:29:30,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:29:30,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:29:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:30,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:29:30,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=336, Unknown=2, NotChecked=78, Total=506 [2024-11-27 20:29:30,625 INFO L87 Difference]: Start difference. First operand 202 states and 223 transitions. Second operand has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:29:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:32,010 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2024-11-27 20:29:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:29:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-11-27 20:29:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:32,012 INFO L225 Difference]: With dead ends: 201 [2024-11-27 20:29:32,012 INFO L226 Difference]: Without dead ends: 201 [2024-11-27 20:29:32,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=556, Unknown=2, NotChecked=102, Total=812 [2024-11-27 20:29:32,013 INFO L435 NwaCegarLoop]: 155 mSDtfsCounter, 73 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:32,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 782 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 911 Invalid, 0 Unknown, 429 Unchecked, 1.0s Time] [2024-11-27 20:29:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-27 20:29:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2024-11-27 20:29:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 117 states have (on average 1.6752136752136753) internal successors, (196), 187 states have internal predecessors, (196), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2024-11-27 20:29:32,024 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 37 [2024-11-27 20:29:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:32,026 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2024-11-27 20:29:32,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.071428571428571) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:29:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2024-11-27 20:29:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 20:29:32,027 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:32,028 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:32,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:29:32,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 20:29:32,229 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:32,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:32,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1528030110, now seen corresponding path program 1 times [2024-11-27 20:29:32,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:32,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156406666] [2024-11-27 20:29:32,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:32,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:33,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:33,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156406666] [2024-11-27 20:29:33,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156406666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:33,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319969644] [2024-11-27 20:29:33,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:33,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:29:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:29:33,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:29:33,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:29:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:33,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 20:29:33,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:29:33,936 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-27 20:29:33,936 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 2 case distinctions, treesize of input 12 treesize of output 16 [2024-11-27 20:29:34,026 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-27 20:29:34,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 10 [2024-11-27 20:29:34,047 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|))) is different from true [2024-11-27 20:29:34,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:34,180 INFO L349 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2024-11-27 20:29:34,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 29 [2024-11-27 20:29:34,355 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-27 20:29:34,356 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 7 [2024-11-27 20:29:34,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:34,479 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-27 20:29:34,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-27 20:29:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:29:34,552 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:29:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319969644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:34,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:29:34,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2024-11-27 20:29:34,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399262021] [2024-11-27 20:29:34,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:34,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:29:34,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:34,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:29:34,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=181, Unknown=1, NotChecked=28, Total=272 [2024-11-27 20:29:34,554 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:29:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:35,116 INFO L93 Difference]: Finished difference Result 207 states and 231 transitions. [2024-11-27 20:29:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:29:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2024-11-27 20:29:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:35,120 INFO L225 Difference]: With dead ends: 207 [2024-11-27 20:29:35,120 INFO L226 Difference]: Without dead ends: 207 [2024-11-27 20:29:35,120 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=181, Unknown=1, NotChecked=28, Total=272 [2024-11-27 20:29:35,121 INFO L435 NwaCegarLoop]: 160 mSDtfsCounter, 53 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:35,122 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 411 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 0 Unknown, 284 Unchecked, 0.5s Time] [2024-11-27 20:29:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-27 20:29:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2024-11-27 20:29:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 121 states have (on average 1.6611570247933884) internal successors, (201), 191 states have internal predecessors, (201), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 20:29:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 229 transitions. [2024-11-27 20:29:35,131 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 229 transitions. Word has length 37 [2024-11-27 20:29:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:35,132 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 229 transitions. [2024-11-27 20:29:35,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:29:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 229 transitions. [2024-11-27 20:29:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:29:35,134 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:35,134 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:35,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:29:35,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:29:35,334 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:35,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -552198522, now seen corresponding path program 1 times [2024-11-27 20:29:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:35,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76402539] [2024-11-27 20:29:35,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:35,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-27 20:29:37,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:37,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76402539] [2024-11-27 20:29:37,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76402539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:37,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938762331] [2024-11-27 20:29:37,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:37,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:29:37,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:29:37,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:29:37,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:29:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:37,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 20:29:37,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:29:37,335 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-27 20:29:37,336 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 2 case distinctions, treesize of input 12 treesize of output 16 [2024-11-27 20:29:37,389 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-27 20:29:37,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 10 [2024-11-27 20:29:37,413 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|))) is different from true [2024-11-27 20:29:37,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:37,523 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-27 20:29:37,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 33 [2024-11-27 20:29:37,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:29:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:37,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 20:29:37,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:29:37,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:37,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 20:29:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 20:29:37,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:29:38,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938762331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:38,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:29:38,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2024-11-27 20:29:38,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967235693] [2024-11-27 20:29:38,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:29:38,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:29:38,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:38,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:29:38,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=210, Unknown=1, NotChecked=30, Total=306 [2024-11-27 20:29:38,050 INFO L87 Difference]: Start difference. First operand 206 states and 229 transitions. Second operand has 16 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 20:29:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:39,237 INFO L93 Difference]: Finished difference Result 206 states and 230 transitions. [2024-11-27 20:29:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:29:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2024-11-27 20:29:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:39,240 INFO L225 Difference]: With dead ends: 206 [2024-11-27 20:29:39,240 INFO L226 Difference]: Without dead ends: 206 [2024-11-27 20:29:39,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=210, Unknown=1, NotChecked=30, Total=306 [2024-11-27 20:29:39,242 INFO L435 NwaCegarLoop]: 155 mSDtfsCounter, 99 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:39,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 670 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 850 Invalid, 0 Unknown, 212 Unchecked, 1.1s Time] [2024-11-27 20:29:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-27 20:29:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2024-11-27 20:29:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 186 states have internal predecessors, (195), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2024-11-27 20:29:39,257 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 52 [2024-11-27 20:29:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:39,257 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2024-11-27 20:29:39,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 20:29:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2024-11-27 20:29:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 20:29:39,259 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:39,259 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:39,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:29:39,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:29:39,463 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:39,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1615630703, now seen corresponding path program 1 times [2024-11-27 20:29:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:39,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430479882] [2024-11-27 20:29:39,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:29:40,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:40,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430479882] [2024-11-27 20:29:40,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430479882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:40,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:40,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:29:40,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398266593] [2024-11-27 20:29:40,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:40,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:29:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:40,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:29:40,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:29:40,016 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 20:29:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:40,734 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2024-11-27 20:29:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:29:40,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 58 [2024-11-27 20:29:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:40,736 INFO L225 Difference]: With dead ends: 205 [2024-11-27 20:29:40,737 INFO L226 Difference]: Without dead ends: 205 [2024-11-27 20:29:40,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:29:40,738 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 176 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:40,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 449 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:29:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-27 20:29:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2024-11-27 20:29:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 117 states have (on average 1.606837606837607) internal successors, (188), 179 states have internal predecessors, (188), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-27 20:29:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2024-11-27 20:29:40,746 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 58 [2024-11-27 20:29:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:40,747 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2024-11-27 20:29:40,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 20:29:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2024-11-27 20:29:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 20:29:40,748 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:40,748 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:29:40,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 20:29:40,748 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:40,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1615630704, now seen corresponding path program 1 times [2024-11-27 20:29:40,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:40,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543137275] [2024-11-27 20:29:40,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:40,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:29:41,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:41,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543137275] [2024-11-27 20:29:41,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543137275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:41,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:41,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:29:41,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383630820] [2024-11-27 20:29:41,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:41,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:29:41,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:41,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:29:41,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:29:41,203 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 20:29:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:41,930 INFO L93 Difference]: Finished difference Result 297 states and 335 transitions. [2024-11-27 20:29:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:29:41,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 58 [2024-11-27 20:29:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:41,932 INFO L225 Difference]: With dead ends: 297 [2024-11-27 20:29:41,932 INFO L226 Difference]: Without dead ends: 297 [2024-11-27 20:29:41,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:29:41,933 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 230 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:41,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 359 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:29:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-27 20:29:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 254. [2024-11-27 20:29:41,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 172 states have (on average 1.6337209302325582) internal successors, (281), 234 states have internal predecessors, (281), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:29:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 319 transitions. [2024-11-27 20:29:41,944 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 319 transitions. Word has length 58 [2024-11-27 20:29:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:41,944 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 319 transitions. [2024-11-27 20:29:41,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 20:29:41,944 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 319 transitions. [2024-11-27 20:29:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 20:29:41,945 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:41,945 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:29:41,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 20:29:41,945 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:41,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1455055517, now seen corresponding path program 1 times [2024-11-27 20:29:41,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:41,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424802532] [2024-11-27 20:29:41,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:41,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:29:42,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:42,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424802532] [2024-11-27 20:29:42,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424802532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:29:42,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:29:42,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:29:42,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047798854] [2024-11-27 20:29:42,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:29:42,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 20:29:42,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:42,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 20:29:42,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:29:42,769 INFO L87 Difference]: Start difference. First operand 254 states and 319 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:29:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:43,491 INFO L93 Difference]: Finished difference Result 259 states and 319 transitions. [2024-11-27 20:29:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:29:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-11-27 20:29:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:43,494 INFO L225 Difference]: With dead ends: 259 [2024-11-27 20:29:43,494 INFO L226 Difference]: Without dead ends: 259 [2024-11-27 20:29:43,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:29:43,496 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 205 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:43,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 361 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:29:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-27 20:29:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2024-11-27 20:29:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 172 states have (on average 1.558139534883721) internal successors, (268), 227 states have internal predecessors, (268), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:29:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 306 transitions. [2024-11-27 20:29:43,512 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 306 transitions. Word has length 59 [2024-11-27 20:29:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:43,513 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 306 transitions. [2024-11-27 20:29:43,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:29:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 306 transitions. [2024-11-27 20:29:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 20:29:43,517 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:43,517 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:29:43,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 20:29:43,517 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:43,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1455055516, now seen corresponding path program 1 times [2024-11-27 20:29:43,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:43,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084459943] [2024-11-27 20:29:43,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:43,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:29:44,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:44,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084459943] [2024-11-27 20:29:44,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084459943] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:44,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594515266] [2024-11-27 20:29:44,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:44,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:29:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:29:44,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:29:44,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:29:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:44,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 20:29:44,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:29:44,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 20:29:44,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-27 20:29:44,791 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-27 20:29:44,792 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 1 case distinctions, treesize of input 17 treesize of output 18 [2024-11-27 20:29:44,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:44,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:44,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-27 20:29:44,841 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-27 20:29:44,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:44,855 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:29:44,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 20:29:44,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-27 20:29:44,896 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-27 20:29:44,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2024-11-27 20:29:44,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:29:44,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:29:45,042 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (select |c_#length| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2024-11-27 20:29:45,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:45,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 20:29:45,121 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-27 20:29:45,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-27 20:29:45,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:29:45,214 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|))) is different from true [2024-11-27 20:29:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:45,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 20:29:45,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 20:29:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:29:45,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 20:29:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 22 not checked. [2024-11-27 20:29:45,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:29:45,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594515266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:45,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:29:45,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2024-11-27 20:29:45,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999465630] [2024-11-27 20:29:45,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:29:45,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:29:45,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:45,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:29:45,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=218, Unknown=2, NotChecked=62, Total=342 [2024-11-27 20:29:45,737 INFO L87 Difference]: Start difference. First operand 247 states and 306 transitions. Second operand has 18 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-27 20:29:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:29:47,264 INFO L93 Difference]: Finished difference Result 242 states and 297 transitions. [2024-11-27 20:29:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:29:47,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 59 [2024-11-27 20:29:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:29:47,268 INFO L225 Difference]: With dead ends: 242 [2024-11-27 20:29:47,268 INFO L226 Difference]: Without dead ends: 242 [2024-11-27 20:29:47,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=406, Unknown=2, NotChecked=86, Total=600 [2024-11-27 20:29:47,269 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 442 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:29:47,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 554 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1044 Invalid, 0 Unknown, 391 Unchecked, 1.2s Time] [2024-11-27 20:29:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-11-27 20:29:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2024-11-27 20:29:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 172 states have (on average 1.4825581395348837) internal successors, (255), 220 states have internal predecessors, (255), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:29:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 293 transitions. [2024-11-27 20:29:47,285 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 293 transitions. Word has length 59 [2024-11-27 20:29:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:29:47,286 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 293 transitions. [2024-11-27 20:29:47,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-27 20:29:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 293 transitions. [2024-11-27 20:29:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-27 20:29:47,289 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:29:47,290 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:29:47,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:29:47,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 20:29:47,490 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:29:47,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:29:47,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1156582130, now seen corresponding path program 1 times [2024-11-27 20:29:47,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:29:47,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702306797] [2024-11-27 20:29:47,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:47,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:29:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 20:29:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:29:48,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702306797] [2024-11-27 20:29:48,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702306797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:48,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535013178] [2024-11-27 20:29:48,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:29:48,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:29:48,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:29:48,255 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:29:48,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:29:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:29:48,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-27 20:29:48,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:29:49,062 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:29:49,065 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:29:49,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-27 20:29:49,606 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-27 20:29:49,607 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 24 treesize of output 16 [2024-11-27 20:29:49,820 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:29:49,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:29:49,824 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 16 treesize of output 11 [2024-11-27 20:29:49,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:29:58,272 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:29:58,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:29:58,277 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 16 treesize of output 11 [2024-11-27 20:29:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 31 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:29:58,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:29:58,335 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 26 [2024-11-27 20:29:59,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535013178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:29:59,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:29:59,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 28 [2024-11-27 20:29:59,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436126113] [2024-11-27 20:29:59,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:29:59,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 20:29:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:29:59,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 20:29:59,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1048, Unknown=30, NotChecked=0, Total=1190 [2024-11-27 20:29:59,427 INFO L87 Difference]: Start difference. First operand 240 states and 293 transitions. Second operand has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-27 20:30:03,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:07,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:11,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:15,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:19,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:23,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:27,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:31,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:39,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:43,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:48,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:52,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:30:56,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:00,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:04,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:08,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:12,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:16,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:20,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:24,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:28,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:31:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:31:34,710 INFO L93 Difference]: Finished difference Result 283 states and 338 transitions. [2024-11-27 20:31:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-27 20:31:34,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2024-11-27 20:31:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:31:34,714 INFO L225 Difference]: With dead ends: 283 [2024-11-27 20:31:34,714 INFO L226 Difference]: Without dead ends: 283 [2024-11-27 20:31:34,715 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=309, Invalid=2739, Unknown=32, NotChecked=0, Total=3080 [2024-11-27 20:31:34,716 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 368 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 50 mSolverCounterUnsat, 153 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 153 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:31:34,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1917 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1896 Invalid, 153 Unknown, 0 Unchecked, 86.2s Time] [2024-11-27 20:31:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-27 20:31:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 266. [2024-11-27 20:31:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 196 states have (on average 1.4591836734693877) internal successors, (286), 244 states have internal predecessors, (286), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:31:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2024-11-27 20:31:34,734 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 66 [2024-11-27 20:31:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:31:34,734 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2024-11-27 20:31:34,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-27 20:31:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2024-11-27 20:31:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-27 20:31:34,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:31:34,735 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:31:34,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:31:34,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 20:31:34,936 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:31:34,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:31:34,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1146103678, now seen corresponding path program 1 times [2024-11-27 20:31:34,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:31:34,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015941119] [2024-11-27 20:31:34,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:31:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:31:36,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:31:36,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015941119] [2024-11-27 20:31:36,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015941119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:31:36,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878647630] [2024-11-27 20:31:36,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:36,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:31:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:31:36,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:31:36,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:31:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:36,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-27 20:31:36,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:31:37,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:31:37,426 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:31:37,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:31:37,431 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 26 treesize of output 17 [2024-11-27 20:31:37,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:31:37,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:31:37,632 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (= (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|) 0) (= |c_#valid| (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#valid| |chain_node_alloc_node_~ptr~0#1.base|))))) is different from true [2024-11-27 20:31:37,724 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-27 20:31:37,724 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 23 treesize of output 24 [2024-11-27 20:31:37,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:31:37,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-27 20:31:37,941 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:31:37,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:31:37,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 12 [2024-11-27 20:31:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2024-11-27 20:31:37,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:31:38,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878647630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:31:38,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:31:38,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2024-11-27 20:31:38,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444103100] [2024-11-27 20:31:38,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:31:38,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-27 20:31:38,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:31:38,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-27 20:31:38,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=799, Unknown=1, NotChecked=56, Total=930 [2024-11-27 20:31:38,204 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 28 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-27 20:31:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:31:41,013 INFO L93 Difference]: Finished difference Result 272 states and 327 transitions. [2024-11-27 20:31:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 20:31:41,013 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 28 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2024-11-27 20:31:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:31:41,015 INFO L225 Difference]: With dead ends: 272 [2024-11-27 20:31:41,016 INFO L226 Difference]: Without dead ends: 272 [2024-11-27 20:31:41,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=1499, Unknown=1, NotChecked=78, Total=1722 [2024-11-27 20:31:41,017 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 268 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:31:41,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1409 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2511 Invalid, 0 Unknown, 212 Unchecked, 2.1s Time] [2024-11-27 20:31:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-27 20:31:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 266. [2024-11-27 20:31:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 196 states have (on average 1.4540816326530612) internal successors, (285), 244 states have internal predecessors, (285), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:31:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 323 transitions. [2024-11-27 20:31:41,030 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 323 transitions. Word has length 66 [2024-11-27 20:31:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:31:41,031 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 323 transitions. [2024-11-27 20:31:41,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.413793103448276) internal successors, (99), 28 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-27 20:31:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 323 transitions. [2024-11-27 20:31:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-27 20:31:41,032 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:31:41,033 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:31:41,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:31:41,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 20:31:41,237 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:31:41,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:31:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1146103679, now seen corresponding path program 1 times [2024-11-27 20:31:41,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:31:41,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95320971] [2024-11-27 20:31:41,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:41,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:31:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:31:42,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:31:42,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95320971] [2024-11-27 20:31:42,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95320971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:31:42,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98179931] [2024-11-27 20:31:42,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:42,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:31:42,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:31:42,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:31:42,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:31:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:43,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-27 20:31:43,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:31:43,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:31:43,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:31:43,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:31:43,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:31:44,086 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 18 [2024-11-27 20:31:44,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:31:44,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:31:44,176 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_11| Int)) (= (select (select |c_#memory_$Pointer$#4.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_11|) 0) 0)) (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (= (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|) 0) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|)))) is different from true [2024-11-27 20:31:44,292 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 18 [2024-11-27 20:31:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:31:44,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-27 20:31:44,318 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-27 20:31:44,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-27 20:31:44,546 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:31:44,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 20:31:44,560 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:31:44,561 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:31:44,571 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-27 20:31:44,572 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 13 [2024-11-27 20:31:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2024-11-27 20:31:44,759 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:31:45,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98179931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:31:45,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:31:45,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 31 [2024-11-27 20:31:45,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526072174] [2024-11-27 20:31:45,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:31:45,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 20:31:45,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:31:45,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 20:31:45,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1163, Unknown=1, NotChecked=68, Total=1332 [2024-11-27 20:31:45,298 INFO L87 Difference]: Start difference. First operand 266 states and 323 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:31:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:31:50,517 INFO L93 Difference]: Finished difference Result 316 states and 373 transitions. [2024-11-27 20:31:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-27 20:31:50,518 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 66 [2024-11-27 20:31:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:31:50,519 INFO L225 Difference]: With dead ends: 316 [2024-11-27 20:31:50,519 INFO L226 Difference]: Without dead ends: 316 [2024-11-27 20:31:50,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=366, Invalid=3927, Unknown=1, NotChecked=128, Total=4422 [2024-11-27 20:31:50,522 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 376 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 3124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:31:50,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1444 Invalid, 3124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2811 Invalid, 0 Unknown, 261 Unchecked, 2.7s Time] [2024-11-27 20:31:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-11-27 20:31:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 280. [2024-11-27 20:31:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 209 states have (on average 1.4593301435406698) internal successors, (305), 257 states have internal predecessors, (305), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:31:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 343 transitions. [2024-11-27 20:31:50,536 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 343 transitions. Word has length 66 [2024-11-27 20:31:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:31:50,537 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 343 transitions. [2024-11-27 20:31:50,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:31:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 343 transitions. [2024-11-27 20:31:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-27 20:31:50,538 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:31:50,538 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:31:50,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:31:50,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:31:50,743 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:31:50,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:31:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1903999324, now seen corresponding path program 1 times [2024-11-27 20:31:50,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:31:50,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81702562] [2024-11-27 20:31:50,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:50,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:31:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 20:31:51,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:31:51,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81702562] [2024-11-27 20:31:51,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81702562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:31:51,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208339210] [2024-11-27 20:31:51,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:31:51,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:31:51,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:31:51,412 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:31:51,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:31:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:31:51,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-27 20:31:51,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:31:52,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:31:52,279 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:31:52,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:31:52,284 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 16 treesize of output 11 [2024-11-27 20:31:52,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:31:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:31:52,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:31:52,902 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 16 treesize of output 11 [2024-11-27 20:31:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:31:52,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:31:52,992 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 26 [2024-11-27 20:31:53,197 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 18 treesize of output 16 [2024-11-27 20:31:53,204 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 26 treesize of output 24 [2024-11-27 20:31:53,411 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 26 [2024-11-27 20:31:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 20:31:53,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208339210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:31:53,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:31:53,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 31 [2024-11-27 20:31:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169351950] [2024-11-27 20:31:53,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:31:53,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 20:31:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:31:53,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 20:31:53,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2024-11-27 20:31:53,921 INFO L87 Difference]: Start difference. First operand 280 states and 343 transitions. Second operand has 31 states, 27 states have (on average 3.925925925925926) internal successors, (106), 30 states have internal predecessors, (106), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-27 20:31:58,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:02,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:06,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:10,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:14,963 WARN L539 Checker$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 20:32:19,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:23,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:27,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:31,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:32:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:32,276 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2024-11-27 20:32:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 20:32:32,277 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 3.925925925925926) internal successors, (106), 30 states have internal predecessors, (106), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 68 [2024-11-27 20:32:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:32,278 INFO L225 Difference]: With dead ends: 306 [2024-11-27 20:32:32,279 INFO L226 Difference]: Without dead ends: 306 [2024-11-27 20:32:32,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2024-11-27 20:32:32,280 INFO L435 NwaCegarLoop]: 176 mSDtfsCounter, 393 mSDsluCounter, 3124 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 20 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:32:32,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 3300 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 936 Invalid, 9 Unknown, 0 Unchecked, 37.7s Time] [2024-11-27 20:32:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-27 20:32:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 292. [2024-11-27 20:32:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 220 states have (on average 1.4318181818181819) internal successors, (315), 268 states have internal predecessors, (315), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:32:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 353 transitions. [2024-11-27 20:32:32,293 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 353 transitions. Word has length 68 [2024-11-27 20:32:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:32,294 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 353 transitions. [2024-11-27 20:32:32,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 3.925925925925926) internal successors, (106), 30 states have internal predecessors, (106), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-27 20:32:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 353 transitions. [2024-11-27 20:32:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-27 20:32:32,295 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:32,295 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:32:32,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 20:32:32,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:32,500 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting check_seq_nextErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:32:32,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1417631779, now seen corresponding path program 1 times [2024-11-27 20:32:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:32:32,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52243990] [2024-11-27 20:32:32,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:32,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:32:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:32:37,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:32:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52243990] [2024-11-27 20:32:37,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52243990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:32:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456846038] [2024-11-27 20:32:37,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:37,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:37,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:37,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:37,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:32:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:37,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-27 20:32:37,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:37,827 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 8 treesize of output 1 [2024-11-27 20:32:37,830 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 8 treesize of output 1 [2024-11-27 20:32:38,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:32:38,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:32:38,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:32:38,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:32:38,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:32:38,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:32:39,314 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 46 treesize of output 23 [2024-11-27 20:32:39,327 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 46 treesize of output 23 [2024-11-27 20:32:39,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:32:39,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:32:40,191 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 59 treesize of output 43 [2024-11-27 20:32:40,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-27 20:32:40,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-27 20:32:40,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:32:40,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:32:41,500 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 74 treesize of output 43 [2024-11-27 20:32:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:32:41,516 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 36 treesize of output 23 [2024-11-27 20:32:41,527 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 57 treesize of output 41 [2024-11-27 20:32:41,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:32:41,539 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 36 treesize of output 23 [2024-11-27 20:32:41,559 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2024-11-27 20:32:41,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2024-11-27 20:32:41,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-27 20:32:42,149 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:32:42,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2024-11-27 20:32:42,158 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:32:42,159 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:32:42,178 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-27 20:32:42,178 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 43 [2024-11-27 20:32:42,359 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:32:42,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 20:32:42,365 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:32:42,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:32:42,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 14 [2024-11-27 20:32:42,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:32:42,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 20:32:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:32:42,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:32:43,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456846038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:32:43,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:32:43,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 57 [2024-11-27 20:32:43,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354877835] [2024-11-27 20:32:43,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:32:43,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-27 20:32:43,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:32:43,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-27 20:32:43,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3689, Unknown=0, NotChecked=0, Total=3906 [2024-11-27 20:32:43,910 INFO L87 Difference]: Start difference. First operand 292 states and 353 transitions. Second operand has 57 states, 54 states have (on average 2.259259259259259) internal successors, (122), 52 states have internal predecessors, (122), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:32:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:54,699 INFO L93 Difference]: Finished difference Result 458 states and 538 transitions. [2024-11-27 20:32:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-27 20:32:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 2.259259259259259) internal successors, (122), 52 states have internal predecessors, (122), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 71 [2024-11-27 20:32:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:54,703 INFO L225 Difference]: With dead ends: 458 [2024-11-27 20:32:54,703 INFO L226 Difference]: Without dead ends: 458 [2024-11-27 20:32:54,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=636, Invalid=9264, Unknown=0, NotChecked=0, Total=9900 [2024-11-27 20:32:54,711 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 355 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 4310 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 3297 SdHoareTripleChecker+Invalid, 4393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:32:54,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 3297 Invalid, 4393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4310 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-27 20:32:54,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2024-11-27 20:32:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 392. [2024-11-27 20:32:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 308 states have (on average 1.3993506493506493) internal successors, (431), 358 states have internal predecessors, (431), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-27 20:32:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 485 transitions. [2024-11-27 20:32:54,735 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 485 transitions. Word has length 71 [2024-11-27 20:32:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:54,735 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 485 transitions. [2024-11-27 20:32:54,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 2.259259259259259) internal successors, (122), 52 states have internal predecessors, (122), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:32:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 485 transitions. [2024-11-27 20:32:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-27 20:32:54,737 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:54,737 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:32:54,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:32:54,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:54,939 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:32:54,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash -932038474, now seen corresponding path program 1 times [2024-11-27 20:32:54,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:32:54,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963902160] [2024-11-27 20:32:54,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:32:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 48 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:32:55,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:32:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963902160] [2024-11-27 20:32:55,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963902160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:32:55,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868570813] [2024-11-27 20:32:55,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:55,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:55,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:55,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:55,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:32:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:56,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 20:32:56,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:56,557 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-27 20:32:56,558 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 20:32:56,569 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 16 treesize of output 11 [2024-11-27 20:32:56,710 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (select |c_#length| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2024-11-27 20:32:56,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:32:56,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-27 20:32:56,764 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-27 20:32:56,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-27 20:32:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 6 not checked. [2024-11-27 20:32:56,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:32:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868570813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:32:56,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:32:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2024-11-27 20:32:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518776655] [2024-11-27 20:32:56,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:32:56,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 20:32:56,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:32:56,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 20:32:56,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=357, Unknown=1, NotChecked=38, Total=462 [2024-11-27 20:32:56,944 INFO L87 Difference]: Start difference. First operand 392 states and 485 transitions. Second operand has 21 states, 20 states have (on average 4.25) internal successors, (85), 19 states have internal predecessors, (85), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-27 20:32:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:59,231 INFO L93 Difference]: Finished difference Result 385 states and 478 transitions. [2024-11-27 20:32:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:32:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.25) internal successors, (85), 19 states have internal predecessors, (85), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 73 [2024-11-27 20:32:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:59,235 INFO L225 Difference]: With dead ends: 385 [2024-11-27 20:32:59,235 INFO L226 Difference]: Without dead ends: 385 [2024-11-27 20:32:59,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=591, Unknown=1, NotChecked=50, Total=756 [2024-11-27 20:32:59,238 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 323 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:32:59,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 706 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1447 Invalid, 0 Unknown, 187 Unchecked, 2.0s Time] [2024-11-27 20:32:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-27 20:32:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 263. [2024-11-27 20:32:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 198 states have (on average 1.3232323232323233) internal successors, (262), 241 states have internal predecessors, (262), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-27 20:32:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 296 transitions. [2024-11-27 20:32:59,251 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 296 transitions. Word has length 73 [2024-11-27 20:32:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:59,252 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 296 transitions. [2024-11-27 20:32:59,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.25) internal successors, (85), 19 states have internal predecessors, (85), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-27 20:32:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 296 transitions. [2024-11-27 20:32:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-27 20:32:59,253 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:59,253 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:32:59,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:32:59,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:59,457 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:32:59,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash 925951935, now seen corresponding path program 1 times [2024-11-27 20:32:59,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:32:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622434879] [2024-11-27 20:32:59,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:59,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:32:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-27 20:32:59,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:32:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622434879] [2024-11-27 20:32:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622434879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:32:59,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:32:59,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:32:59,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420674765] [2024-11-27 20:32:59,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:32:59,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:32:59,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:32:59,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:32:59,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:32:59,666 INFO L87 Difference]: Start difference. First operand 263 states and 296 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:33:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:00,094 INFO L93 Difference]: Finished difference Result 262 states and 295 transitions. [2024-11-27 20:33:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:33:00,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 73 [2024-11-27 20:33:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:00,096 INFO L225 Difference]: With dead ends: 262 [2024-11-27 20:33:00,096 INFO L226 Difference]: Without dead ends: 262 [2024-11-27 20:33:00,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:33:00,098 INFO L435 NwaCegarLoop]: 151 mSDtfsCounter, 79 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:00,098 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 714 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:33:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-27 20:33:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2024-11-27 20:33:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 198 states have (on average 1.3181818181818181) internal successors, (261), 240 states have internal predecessors, (261), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-27 20:33:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 295 transitions. [2024-11-27 20:33:00,113 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 295 transitions. Word has length 73 [2024-11-27 20:33:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:00,113 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 295 transitions. [2024-11-27 20:33:00,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:33:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 295 transitions. [2024-11-27 20:33:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-27 20:33:00,114 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:00,115 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:33:00,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-27 20:33:00,115 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:33:00,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 925951936, now seen corresponding path program 1 times [2024-11-27 20:33:00,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:33:00,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193123512] [2024-11-27 20:33:00,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:00,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:33:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:33:01,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:33:01,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193123512] [2024-11-27 20:33:01,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193123512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:33:01,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217491334] [2024-11-27 20:33:01,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:01,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:01,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:01,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:01,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:33:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:02,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-27 20:33:02,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:02,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 20:33:02,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:02,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:03,006 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:03,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-27 20:33:03,013 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:03,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:33:03,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-27 20:33:03,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:03,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:03,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:33:03,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:33:03,364 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_21| Int)) (<= (select (select |c_#memory_$Pointer$#4.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_21|) 0) 0)) (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (= (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|) 0) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|)))) is different from true [2024-11-27 20:33:03,481 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-27 20:33:03,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-27 20:33:03,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-27 20:33:04,348 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:04,349 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:04,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:33:04,357 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 22 [2024-11-27 20:33:04,366 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:04,370 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:04,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:33:04,388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 40 [2024-11-27 20:33:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2024-11-27 20:33:04,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:05,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217491334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:33:05,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:05,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2024-11-27 20:33:05,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928872448] [2024-11-27 20:33:05,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:05,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-27 20:33:05,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:33:05,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-27 20:33:05,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1751, Unknown=1, NotChecked=84, Total=1980 [2024-11-27 20:33:05,246 INFO L87 Difference]: Start difference. First operand 262 states and 295 transitions. Second operand has 38 states, 37 states have (on average 3.189189189189189) internal successors, (118), 35 states have internal predecessors, (118), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-27 20:33:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:11,980 INFO L93 Difference]: Finished difference Result 361 states and 408 transitions. [2024-11-27 20:33:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-27 20:33:11,981 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.189189189189189) internal successors, (118), 35 states have internal predecessors, (118), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 73 [2024-11-27 20:33:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:11,983 INFO L225 Difference]: With dead ends: 361 [2024-11-27 20:33:11,983 INFO L226 Difference]: Without dead ends: 361 [2024-11-27 20:33:11,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=375, Invalid=4458, Unknown=1, NotChecked=136, Total=4970 [2024-11-27 20:33:11,986 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 414 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 3692 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 4069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:11,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 1821 Invalid, 4069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3692 Invalid, 0 Unknown, 305 Unchecked, 4.4s Time] [2024-11-27 20:33:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-11-27 20:33:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 275. [2024-11-27 20:33:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 209 states have (on average 1.30622009569378) internal successors, (273), 251 states have internal predecessors, (273), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:33:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 311 transitions. [2024-11-27 20:33:11,999 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 311 transitions. Word has length 73 [2024-11-27 20:33:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:11,999 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 311 transitions. [2024-11-27 20:33:12,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.189189189189189) internal successors, (118), 35 states have internal predecessors, (118), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-27 20:33:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 311 transitions. [2024-11-27 20:33:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-27 20:33:12,001 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:12,001 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2024-11-27 20:33:12,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:33:12,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-27 20:33:12,205 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:33:12,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1262945815, now seen corresponding path program 1 times [2024-11-27 20:33:12,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:33:12,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984244733] [2024-11-27 20:33:12,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:12,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:33:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:33:17,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:33:17,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984244733] [2024-11-27 20:33:17,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984244733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:33:17,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291581143] [2024-11-27 20:33:17,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:17,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:17,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:17,431 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:17,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:33:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:17,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-27 20:33:17,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:18,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:33:18,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 20:33:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:33:18,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-27 20:33:18,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:33:18,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-27 20:33:18,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:18,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:19,470 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:19,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-11-27 20:33:19,491 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:19,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:33:19,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-27 20:33:19,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:19,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:19,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-27 20:33:19,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-27 20:33:19,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:33:20,605 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#3.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.base| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.base|) (= (store |c_old(#memory_$Pointer$#3.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#3.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#3.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_26| Int)) (<= (select (select |c_#memory_$Pointer$#4.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_26|) 0) 0))) is different from true [2024-11-27 20:33:20,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:33:20,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-27 20:33:20,719 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-27 20:33:20,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-27 20:33:20,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-27 20:33:22,331 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:22,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:33:22,347 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 40 [2024-11-27 20:33:22,364 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:22,370 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:33:22,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:33:22,399 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 40 [2024-11-27 20:33:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-27 20:33:22,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:23,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291581143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:33:23,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:23,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27] total 55 [2024-11-27 20:33:23,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226692097] [2024-11-27 20:33:23,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:23,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-27 20:33:23,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:33:23,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-27 20:33:23,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3449, Unknown=1, NotChecked=118, Total=3782 [2024-11-27 20:33:23,960 INFO L87 Difference]: Start difference. First operand 275 states and 311 transitions. Second operand has 55 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 51 states have internal predecessors, (132), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-27 20:33:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:41,438 INFO L93 Difference]: Finished difference Result 482 states and 548 transitions. [2024-11-27 20:33:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-27 20:33:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 51 states have internal predecessors, (132), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 78 [2024-11-27 20:33:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:41,445 INFO L225 Difference]: With dead ends: 482 [2024-11-27 20:33:41,448 INFO L226 Difference]: Without dead ends: 482 [2024-11-27 20:33:41,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=675, Invalid=9228, Unknown=1, NotChecked=196, Total=10100 [2024-11-27 20:33:41,453 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 550 mSDsluCounter, 3022 mSDsCounter, 0 mSdLazyCounter, 4561 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 3127 SdHoareTripleChecker+Invalid, 5137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:41,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 3127 Invalid, 5137 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [145 Valid, 4561 Invalid, 0 Unknown, 431 Unchecked, 9.4s Time] [2024-11-27 20:33:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2024-11-27 20:33:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 276. [2024-11-27 20:33:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 210 states have (on average 1.3047619047619048) internal successors, (274), 252 states have internal predecessors, (274), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 20:33:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 312 transitions. [2024-11-27 20:33:41,484 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 312 transitions. Word has length 78 [2024-11-27 20:33:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:41,485 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 312 transitions. [2024-11-27 20:33:41,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 51 states have internal predecessors, (132), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-27 20:33:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 312 transitions. [2024-11-27 20:33:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-27 20:33:41,488 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:41,489 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2024-11-27 20:33:41,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:33:41,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:41,690 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-27 20:33:41,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash -513564248, now seen corresponding path program 1 times [2024-11-27 20:33:41,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:33:41,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793530655] [2024-11-27 20:33:41,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:41,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:33:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:33:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:33:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793530655] [2024-11-27 20:33:45,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793530655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:33:45,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40406247] [2024-11-27 20:33:45,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:45,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:45,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:45,104 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:45,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6952eff0-5295-4372-9005-04f2d044f4cc/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:33:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:45,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-27 20:33:45,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:45,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:33:45,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 20:33:45,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:33:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:33:45,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-27 20:33:45,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-27 20:33:45,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-27 20:33:46,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 20:33:46,210 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-27 20:33:46,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-27 20:33:46,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:33:46,749 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 29 treesize of output 17 [2024-11-27 20:33:46,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-27 20:33:47,048 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_chain_node_~ppnode#1.offset_77| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_77|))) (and (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |c_chain_node_#in~ppnode#1.base| (store (select |c_old(#memory_$Pointer$#1.base)| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_77| .cse0))) (= |c_#valid| (store |c_old(#valid)| .cse0 (select |c_#valid| .cse0)))))) is different from true [2024-11-27 20:33:47,096 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-27 20:33:47,096 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 44 treesize of output 28 [2024-11-27 20:33:47,128 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2024-11-27 20:33:47,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2024-11-27 20:33:47,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-27 20:33:48,019 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 63 treesize of output 55 [2024-11-27 20:33:48,026 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 51 treesize of output 45 [2024-11-27 20:33:48,327 INFO L349 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2024-11-27 20:33:48,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 68 [2024-11-27 20:33:48,339 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 57 treesize of output 49 [2024-11-27 20:33:49,791 INFO L349 Elim1Store]: treesize reduction 84, result has 70.2 percent of original size [2024-11-27 20:33:49,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 147 treesize of output 314