./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --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_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/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_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/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_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:17:48,382 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:17:48,463 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 23:17:48,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:17:48,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:17:48,501 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:17:48,502 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:17:48,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:17:48,503 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:17:48,503 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:17:48,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:17:48,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:17:48,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:17:48,505 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:17:48,505 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:17:48,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:17:48,505 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:17:48,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:17:48,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:17:48,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:17:48,506 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 23:17:48,506 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 23:17:48,506 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 23:17:48,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:17:48,506 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 23:17:48,507 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:17:48,507 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:17:48,507 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:17:48,507 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:17:48,507 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:17:48,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:17:48,508 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:17:48,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:17:48,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:48,508 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:17:48,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:17:48,508 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:48,509 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:17:48,509 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:17:48,509 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_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/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 -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2024-11-27 23:17:48,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:17:48,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:17:48,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:17:48,802 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:17:48,802 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:17:48,803 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2024-11-27 23:17:51,654 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/data/c1ad484bc/4682a0ec13404acb97a64135a601195b/FLAG86ef84209 [2024-11-27 23:17:51,948 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:17:51,949 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2024-11-27 23:17:51,972 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/data/c1ad484bc/4682a0ec13404acb97a64135a601195b/FLAG86ef84209 [2024-11-27 23:17:51,994 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/data/c1ad484bc/4682a0ec13404acb97a64135a601195b [2024-11-27 23:17:51,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:17:51,999 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:17:52,001 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:17:52,001 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:17:52,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:17:52,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:17:51" (1/1) ... [2024-11-27 23:17:52,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7046ec35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52, skipping insertion in model container [2024-11-27 23:17:52,014 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:17:51" (1/1) ... [2024-11-27 23:17:52,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:17:52,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:17:52,216 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:17:52,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:17:52,252 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:17:52,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52 WrapperNode [2024-11-27 23:17:52,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:17:52,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:17:52,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:17:52,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:17:52,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,268 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,287 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-11-27 23:17:52,288 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:17:52,289 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:17:52,289 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:17:52,289 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:17:52,298 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,305 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,326 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [1, 2]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 23:17:52,326 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,334 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:17:52,354 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:17:52,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:17:52,354 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:17:52,355 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (1/1) ... [2024-11-27 23:17:52,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:52,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:52,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:17:52,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:17:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:17:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:17:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:17:52,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:17:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:17:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:17:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 23:17:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 23:17:52,510 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:17:52,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:17:52,753 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-27 23:17:52,754 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:17:52,766 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:17:52,767 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 23:17:52,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:17:52 BoogieIcfgContainer [2024-11-27 23:17:52,768 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:17:52,772 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:17:52,772 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:17:52,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:17:52,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:17:51" (1/3) ... [2024-11-27 23:17:52,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339b84e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:17:52, skipping insertion in model container [2024-11-27 23:17:52,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:52" (2/3) ... [2024-11-27 23:17:52,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339b84e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:17:52, skipping insertion in model container [2024-11-27 23:17:52,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:17:52" (3/3) ... [2024-11-27 23:17:52,780 INFO L128 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2024-11-27 23:17:52,798 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:17:52,800 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG ArraysWithLenghtAtDeclaration_-read.c that has 1 procedures, 29 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-11-27 23:17:52,853 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:17:52,867 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;@6bb71e76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:17:52,867 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-27 23:17:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.75) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-27 23:17:52,878 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:52,878 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 23:17:52,879 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:52,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash 890553482, now seen corresponding path program 1 times [2024-11-27 23:17:52,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:52,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139117583] [2024-11-27 23:17:52,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:52,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:53,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:53,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139117583] [2024-11-27 23:17:53,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139117583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:53,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:53,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:17:53,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990170844] [2024-11-27 23:17:53,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:53,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 23:17:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:53,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 23:17:53,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:17:53,060 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.75) internal successors, (35), 28 states have internal predecessors, (35), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:53,072 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2024-11-27 23:17:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 23:17:53,074 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2024-11-27 23:17:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:53,080 INFO L225 Difference]: With dead ends: 29 [2024-11-27 23:17:53,081 INFO L226 Difference]: Without dead ends: 27 [2024-11-27 23:17:53,085 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 23:17:53,088 INFO L435 NwaCegarLoop]: 32 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, 32 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 23:17:53,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:17:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-27 23:17:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-27 23:17:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-27 23:17:53,129 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2024-11-27 23:17:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:53,130 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-27 23:17:53,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-27 23:17:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-27 23:17:53,130 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:53,131 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 23:17:53,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:17:53,131 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:53,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash 889601163, now seen corresponding path program 1 times [2024-11-27 23:17:53,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:53,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974512762] [2024-11-27 23:17:53,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:53,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:53,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974512762] [2024-11-27 23:17:53,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974512762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:53,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:53,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:17:53,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007545314] [2024-11-27 23:17:53,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:53,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:17:53,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:53,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:17:53,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:17:53,316 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:53,373 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-27 23:17:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:17:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2024-11-27 23:17:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:53,375 INFO L225 Difference]: With dead ends: 33 [2024-11-27 23:17:53,375 INFO L226 Difference]: Without dead ends: 33 [2024-11-27 23:17:53,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:17:53,376 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:53,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-27 23:17:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-11-27 23:17:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-27 23:17:53,385 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2024-11-27 23:17:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:53,386 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-27 23:17:53,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-27 23:17:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-27 23:17:53,387 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:53,387 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 23:17:53,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:17:53,388 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:53,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 889689543, now seen corresponding path program 1 times [2024-11-27 23:17:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:53,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898167182] [2024-11-27 23:17:53,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:53,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:53,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898167182] [2024-11-27 23:17:53,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898167182] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:53,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:53,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:17:53,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775610588] [2024-11-27 23:17:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:53,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:17:53,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:53,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:17:53,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:17:53,513 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:53,568 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-27 23:17:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:17:53,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2024-11-27 23:17:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:53,569 INFO L225 Difference]: With dead ends: 49 [2024-11-27 23:17:53,570 INFO L226 Difference]: Without dead ends: 49 [2024-11-27 23:17:53,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:17:53,571 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:53,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:17:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-27 23:17:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2024-11-27 23:17:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-27 23:17:53,579 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 6 [2024-11-27 23:17:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:53,581 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-27 23:17:53,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-27 23:17:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 23:17:53,582 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:53,582 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:53,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:17:53,582 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:53,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:53,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1807832333, now seen corresponding path program 1 times [2024-11-27 23:17:53,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:53,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023832070] [2024-11-27 23:17:53,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:53,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:53,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:53,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023832070] [2024-11-27 23:17:53,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023832070] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:53,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:53,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:17:53,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68501625] [2024-11-27 23:17:53,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:53,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:17:53,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:53,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:17:53,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:17:53,746 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:53,807 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-27 23:17:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:17:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2024-11-27 23:17:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:53,810 INFO L225 Difference]: With dead ends: 30 [2024-11-27 23:17:53,810 INFO L226 Difference]: Without dead ends: 30 [2024-11-27 23:17:53,810 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:17:53,811 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:53,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:17:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-27 23:17:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-27 23:17:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-27 23:17:53,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 7 [2024-11-27 23:17:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:53,819 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-27 23:17:53,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-27 23:17:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 23:17:53,819 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:53,819 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:53,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:17:53,820 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:53,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1807832334, now seen corresponding path program 1 times [2024-11-27 23:17:53,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:53,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860412934] [2024-11-27 23:17:53,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:53,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:54,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:54,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860412934] [2024-11-27 23:17:54,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860412934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:54,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:54,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:17:54,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25558348] [2024-11-27 23:17:54,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:54,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:17:54,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:54,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:17:54,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:17:54,007 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:54,113 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-27 23:17:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:17:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2024-11-27 23:17:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:54,114 INFO L225 Difference]: With dead ends: 33 [2024-11-27 23:17:54,114 INFO L226 Difference]: Without dead ends: 33 [2024-11-27 23:17:54,114 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:17:54,115 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:54,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-27 23:17:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-27 23:17:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-27 23:17:54,118 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2024-11-27 23:17:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:54,118 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-27 23:17:54,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-27 23:17:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-27 23:17:54,119 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:54,119 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:54,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 23:17:54,119 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:54,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash 208295028, now seen corresponding path program 1 times [2024-11-27 23:17:54,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:54,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399191699] [2024-11-27 23:17:54,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:54,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:54,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399191699] [2024-11-27 23:17:54,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399191699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:54,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:54,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 23:17:54,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510197957] [2024-11-27 23:17:54,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:54,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:17:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:54,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:17:54,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:17:54,236 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:54,355 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-11-27 23:17:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:17:54,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2024-11-27 23:17:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:54,356 INFO L225 Difference]: With dead ends: 50 [2024-11-27 23:17:54,356 INFO L226 Difference]: Without dead ends: 50 [2024-11-27 23:17:54,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:17:54,357 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:54,357 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-27 23:17:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2024-11-27 23:17:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-27 23:17:54,364 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2024-11-27 23:17:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:54,364 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-27 23:17:54,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-27 23:17:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 23:17:54,365 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:54,365 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:54,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 23:17:54,365 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:54,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1756862701, now seen corresponding path program 1 times [2024-11-27 23:17:54,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:54,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434008013] [2024-11-27 23:17:54,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:54,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:54,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:54,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434008013] [2024-11-27 23:17:54,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434008013] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:54,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632582290] [2024-11-27 23:17:54,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:54,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:54,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:54,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:17:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:54,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:17:54,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:54,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:54,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632582290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:54,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:54,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-27 23:17:54,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179239798] [2024-11-27 23:17:54,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:54,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:17:54,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:54,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:17:54,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:17:54,678 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:54,790 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-11-27 23:17:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:17:54,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-27 23:17:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:54,793 INFO L225 Difference]: With dead ends: 48 [2024-11-27 23:17:54,793 INFO L226 Difference]: Without dead ends: 48 [2024-11-27 23:17:54,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:17:54,794 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:54,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-27 23:17:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-11-27 23:17:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-27 23:17:54,799 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 10 [2024-11-27 23:17:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:54,799 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-27 23:17:54,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-27 23:17:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-27 23:17:54,800 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:54,800 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:54,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:55,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:55,005 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:55,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1371831174, now seen corresponding path program 1 times [2024-11-27 23:17:55,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:55,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811303727] [2024-11-27 23:17:55,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:55,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:55,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:55,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811303727] [2024-11-27 23:17:55,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811303727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:55,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788517136] [2024-11-27 23:17:55,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:55,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:55,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:55,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:55,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:17:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:55,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 23:17:55,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:55,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:17:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:55,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:55,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788517136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:55,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:55,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-27 23:17:55,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104107831] [2024-11-27 23:17:55,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:55,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:17:55,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:55,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:17:55,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:17:55,610 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:55,831 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-11-27 23:17:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:17:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 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 11 [2024-11-27 23:17:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:55,833 INFO L225 Difference]: With dead ends: 49 [2024-11-27 23:17:55,834 INFO L226 Difference]: Without dead ends: 49 [2024-11-27 23:17:55,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:17:55,835 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:55,838 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-27 23:17:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-11-27 23:17:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.368421052631579) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-27 23:17:55,846 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 11 [2024-11-27 23:17:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:55,846 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-27 23:17:55,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-27 23:17:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-27 23:17:55,847 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:55,847 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:55,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:56,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:56,048 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:56,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash -422839044, now seen corresponding path program 1 times [2024-11-27 23:17:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:56,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751191682] [2024-11-27 23:17:56,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:56,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:56,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751191682] [2024-11-27 23:17:56,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751191682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:56,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670615983] [2024-11-27 23:17:56,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:56,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:56,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:56,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:17:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:56,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:17:56,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:56,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:56,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670615983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:56,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:56,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-27 23:17:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106442542] [2024-11-27 23:17:56,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:56,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:17:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:56,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:17:56,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:17:56,342 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:56,547 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2024-11-27 23:17:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:17:56,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-27 23:17:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:56,548 INFO L225 Difference]: With dead ends: 73 [2024-11-27 23:17:56,548 INFO L226 Difference]: Without dead ends: 73 [2024-11-27 23:17:56,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:17:56,549 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:56,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 40 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:56,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-27 23:17:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2024-11-27 23:17:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-11-27 23:17:56,553 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 12 [2024-11-27 23:17:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:56,554 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-11-27 23:17:56,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-11-27 23:17:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-27 23:17:56,554 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:56,554 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:56,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:56,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:56,755 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:56,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:56,755 INFO L85 PathProgramCache]: Analyzing trace with hash -275373692, now seen corresponding path program 2 times [2024-11-27 23:17:56,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:56,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700966423] [2024-11-27 23:17:56,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:17:56,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:56,774 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 23:17:56,774 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:17:56,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700966423] [2024-11-27 23:17:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700966423] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:56,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:56,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:17:56,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79872343] [2024-11-27 23:17:56,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:56,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:17:56,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:56,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:17:56,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:17:56,850 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:56,877 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2024-11-27 23:17:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:17:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-27 23:17:56,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:56,879 INFO L225 Difference]: With dead ends: 41 [2024-11-27 23:17:56,880 INFO L226 Difference]: Without dead ends: 41 [2024-11-27 23:17:56,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:17:56,882 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:56,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:17:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-27 23:17:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-27 23:17:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-27 23:17:56,885 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 16 [2024-11-27 23:17:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:56,885 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-27 23:17:56,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-27 23:17:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-27 23:17:56,886 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:56,886 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:56,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 23:17:56,887 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:56,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash -275373691, now seen corresponding path program 1 times [2024-11-27 23:17:56,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:56,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506138944] [2024-11-27 23:17:56,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:17:57,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:57,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506138944] [2024-11-27 23:17:57,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506138944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:57,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:57,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:17:57,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057600934] [2024-11-27 23:17:57,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:57,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:17:57,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:57,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:17:57,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:17:57,069 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:57,122 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2024-11-27 23:17:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:17:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-27 23:17:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:57,123 INFO L225 Difference]: With dead ends: 67 [2024-11-27 23:17:57,123 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 23:17:57,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:17:57,125 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:57,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:17:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 23:17:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2024-11-27 23:17:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-11-27 23:17:57,136 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 16 [2024-11-27 23:17:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:57,136 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-11-27 23:17:57,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-11-27 23:17:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 23:17:57,137 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:57,137 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:57,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 23:17:57,137 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:57,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:57,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1884296825, now seen corresponding path program 1 times [2024-11-27 23:17:57,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:57,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693637371] [2024-11-27 23:17:57,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:57,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:17:57,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:57,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693637371] [2024-11-27 23:17:57,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693637371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:57,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804376420] [2024-11-27 23:17:57,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:57,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:57,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:57,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:57,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:17:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:57,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:17:57,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:17:57,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:57,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-27 23:17:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:17:57,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804376420] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:57,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:17:57,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-27 23:17:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045607336] [2024-11-27 23:17:57,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:57,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:17:57,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:57,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:17:57,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:17:57,706 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:57,817 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2024-11-27 23:17:57,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:17:57,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 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 21 [2024-11-27 23:17:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:57,818 INFO L225 Difference]: With dead ends: 69 [2024-11-27 23:17:57,818 INFO L226 Difference]: Without dead ends: 69 [2024-11-27 23:17:57,818 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:17:57,818 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:57,819 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 33 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-27 23:17:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2024-11-27 23:17:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.25) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-11-27 23:17:57,823 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 21 [2024-11-27 23:17:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:57,823 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-11-27 23:17:57,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-11-27 23:17:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-27 23:17:57,824 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:57,824 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-27 23:17:57,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:58,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:17:58,027 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:58,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1566323029, now seen corresponding path program 2 times [2024-11-27 23:17:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:58,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501022367] [2024-11-27 23:17:58,028 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:17:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:58,049 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:17:58,049 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:58,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:58,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501022367] [2024-11-27 23:17:58,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501022367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:58,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940774628] [2024-11-27 23:17:58,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:17:58,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:58,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:58,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:58,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:17:58,285 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:17:58,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:58,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:17:58,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:17:58,391 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:17:58,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940774628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:58,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:17:58,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-11-27 23:17:58,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708954270] [2024-11-27 23:17:58,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:58,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:17:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:58,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:17:58,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:17:58,393 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:58,498 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2024-11-27 23:17:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:17:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 22 [2024-11-27 23:17:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:58,499 INFO L225 Difference]: With dead ends: 57 [2024-11-27 23:17:58,499 INFO L226 Difference]: Without dead ends: 57 [2024-11-27 23:17:58,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:17:58,500 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:58,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-27 23:17:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-27 23:17:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.2) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-11-27 23:17:58,504 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 22 [2024-11-27 23:17:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:58,504 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-11-27 23:17:58,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-11-27 23:17:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 23:17:58,505 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:58,505 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:58,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:17:58,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:17:58,710 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:58,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 135841243, now seen corresponding path program 1 times [2024-11-27 23:17:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:58,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946993483] [2024-11-27 23:17:58,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:17:58,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946993483] [2024-11-27 23:17:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946993483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:58,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967479419] [2024-11-27 23:17:58,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:58,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:58,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:58,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:58,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:17:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:58,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:17:58,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:59,209 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_17| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_12| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_17| 1) |v_ULTIMATE.start_main_~#mask~0#1.base_12|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_17|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_17| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_12| 0)))) is different from true [2024-11-27 23:17:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:17:59,210 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:17:59,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967479419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:59,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:17:59,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-27 23:17:59,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632767935] [2024-11-27 23:17:59,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:59,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:17:59,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:59,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:17:59,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-27 23:17:59,211 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:59,253 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2024-11-27 23:17:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:17:59,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 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 24 [2024-11-27 23:17:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:59,254 INFO L225 Difference]: With dead ends: 56 [2024-11-27 23:17:59,254 INFO L226 Difference]: Without dead ends: 54 [2024-11-27 23:17:59,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-27 23:17:59,255 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:59,255 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2024-11-27 23:17:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-27 23:17:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-27 23:17:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-11-27 23:17:59,261 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 24 [2024-11-27 23:17:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:59,262 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-11-27 23:17:59,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-11-27 23:17:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 23:17:59,262 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:59,262 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:59,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 23:17:59,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:17:59,463 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:17:59,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:59,463 INFO L85 PathProgramCache]: Analyzing trace with hash 135844733, now seen corresponding path program 1 times [2024-11-27 23:17:59,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:59,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976995451] [2024-11-27 23:17:59,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:59,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:17:59,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976995451] [2024-11-27 23:17:59,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976995451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:17:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265958546] [2024-11-27 23:17:59,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:59,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:59,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:59,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:17:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:59,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 23:17:59,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:59,783 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 23:17:59,849 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 23:17:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:59,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:59,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-27 23:17:59,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-27 23:18:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:18:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265958546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:00,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:00,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2024-11-27 23:18:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520218278] [2024-11-27 23:18:00,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:00,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:18:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:00,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:18:00,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:18:00,129 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:00,383 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-11-27 23:18:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:18:00,383 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 24 [2024-11-27 23:18:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:00,384 INFO L225 Difference]: With dead ends: 86 [2024-11-27 23:18:00,384 INFO L226 Difference]: Without dead ends: 86 [2024-11-27 23:18:00,384 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:18:00,385 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:00,385 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 126 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:18:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-27 23:18:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2024-11-27 23:18:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.169811320754717) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-11-27 23:18:00,388 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 24 [2024-11-27 23:18:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:00,389 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-11-27 23:18:00,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-11-27 23:18:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-27 23:18:00,389 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:00,390 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-27 23:18:00,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 23:18:00,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 23:18:00,594 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:00,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:00,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1423184516, now seen corresponding path program 1 times [2024-11-27 23:18:00,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:00,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148990335] [2024-11-27 23:18:00,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:18:00,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:00,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148990335] [2024-11-27 23:18:00,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148990335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:00,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577839887] [2024-11-27 23:18:00,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:00,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:00,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:00,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:00,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:18:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:00,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 23:18:00,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:18:00,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:18:01,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577839887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:01,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:01,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-27 23:18:01,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081064352] [2024-11-27 23:18:01,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:01,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:18:01,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:01,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:18:01,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:18:01,089 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:01,336 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-11-27 23:18:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:18:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 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 31 [2024-11-27 23:18:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:01,337 INFO L225 Difference]: With dead ends: 58 [2024-11-27 23:18:01,338 INFO L226 Difference]: Without dead ends: 58 [2024-11-27 23:18:01,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:18:01,339 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:01,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 51 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:18:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-27 23:18:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-27 23:18:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-11-27 23:18:01,342 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 31 [2024-11-27 23:18:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:01,342 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-11-27 23:18:01,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-11-27 23:18:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 23:18:01,343 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:01,343 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-27 23:18:01,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 23:18:01,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:18:01,543 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:01,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:01,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1224350604, now seen corresponding path program 2 times [2024-11-27 23:18:01,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:01,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274711175] [2024-11-27 23:18:01,544 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:01,579 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:01,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:18:01,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:01,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274711175] [2024-11-27 23:18:01,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274711175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:01,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145669521] [2024-11-27 23:18:01,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:01,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:01,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:01,770 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:01,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:18:01,849 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:01,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:01,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 23:18:01,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:01,876 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 23:18:01,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:18:01,898 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 10 treesize of output 8 [2024-11-27 23:18:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:18:02,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:18:02,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145669521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:02,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:02,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 7 [2024-11-27 23:18:02,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391550141] [2024-11-27 23:18:02,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:02,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:18:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:02,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:18:02,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:18:02,406 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:02,506 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2024-11-27 23:18:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:18:02,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 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 35 [2024-11-27 23:18:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:02,507 INFO L225 Difference]: With dead ends: 137 [2024-11-27 23:18:02,507 INFO L226 Difference]: Without dead ends: 137 [2024-11-27 23:18:02,507 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:18:02,508 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:02,508 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 66 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:18:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-27 23:18:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2024-11-27 23:18:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 130 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2024-11-27 23:18:02,516 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 35 [2024-11-27 23:18:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:02,516 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2024-11-27 23:18:02,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2024-11-27 23:18:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 23:18:02,517 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:02,517 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:02,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:02,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 23:18:02,718 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:02,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash -285031318, now seen corresponding path program 1 times [2024-11-27 23:18:02,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:02,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86462018] [2024-11-27 23:18:02,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:02,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:18:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86462018] [2024-11-27 23:18:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86462018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399080134] [2024-11-27 23:18:02,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:02,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:02,902 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:02,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:18:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:02,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:18:02,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:18:03,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:18:03,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399080134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:03,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:03,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-11-27 23:18:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28920742] [2024-11-27 23:18:03,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:03,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:18:03,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:03,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:18:03,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:18:03,236 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:03,459 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2024-11-27 23:18:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:18:03,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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 37 [2024-11-27 23:18:03,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:03,460 INFO L225 Difference]: With dead ends: 127 [2024-11-27 23:18:03,460 INFO L226 Difference]: Without dead ends: 127 [2024-11-27 23:18:03,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2024-11-27 23:18:03,461 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:03,461 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 55 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:18:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-27 23:18:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-11-27 23:18:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.15) internal successors, (138), 124 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2024-11-27 23:18:03,469 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 37 [2024-11-27 23:18:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:03,469 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2024-11-27 23:18:03,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:03,469 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2024-11-27 23:18:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 23:18:03,470 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:03,470 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:03,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:03,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:18:03,671 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:03,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash 818009732, now seen corresponding path program 2 times [2024-11-27 23:18:03,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:03,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780164649] [2024-11-27 23:18:03,671 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:03,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:03,698 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:03,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 23:18:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:03,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780164649] [2024-11-27 23:18:03,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780164649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:03,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885410011] [2024-11-27 23:18:03,794 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:03,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:03,797 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:03,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:18:03,883 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:03,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:03,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:18:03,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:18:04,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:04,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-27 23:18:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:18:04,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885410011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:04,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:04,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-27 23:18:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761870265] [2024-11-27 23:18:04,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:04,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:18:04,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:04,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:18:04,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:18:04,382 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:04,583 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2024-11-27 23:18:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:18:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 43 [2024-11-27 23:18:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:04,584 INFO L225 Difference]: With dead ends: 132 [2024-11-27 23:18:04,584 INFO L226 Difference]: Without dead ends: 132 [2024-11-27 23:18:04,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:18:04,585 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 137 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:04,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 80 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:18:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-27 23:18:04,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2024-11-27 23:18:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 127 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2024-11-27 23:18:04,589 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 43 [2024-11-27 23:18:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:04,590 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2024-11-27 23:18:04,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2024-11-27 23:18:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-27 23:18:04,591 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:04,591 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1] [2024-11-27 23:18:04,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:18:04,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:04,796 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:04,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1486412605, now seen corresponding path program 2 times [2024-11-27 23:18:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:04,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797870805] [2024-11-27 23:18:04,796 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:04,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:04,832 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:04,832 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:18:05,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:05,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797870805] [2024-11-27 23:18:05,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797870805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:05,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766763497] [2024-11-27 23:18:05,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:05,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:05,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:05,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:05,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:18:05,140 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:05,140 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:05,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 23:18:05,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 37 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:18:05,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 37 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 23:18:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766763497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:05,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:05,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-11-27 23:18:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030863176] [2024-11-27 23:18:05,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:05,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 23:18:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:05,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 23:18:05,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:18:05,497 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:05,821 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2024-11-27 23:18:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 23:18:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 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 56 [2024-11-27 23:18:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:05,822 INFO L225 Difference]: With dead ends: 128 [2024-11-27 23:18:05,822 INFO L226 Difference]: Without dead ends: 128 [2024-11-27 23:18:05,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2024-11-27 23:18:05,823 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:05,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:18:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-27 23:18:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2024-11-27 23:18:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.115702479338843) internal successors, (135), 125 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2024-11-27 23:18:05,829 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 56 [2024-11-27 23:18:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:05,829 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2024-11-27 23:18:05,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2024-11-27 23:18:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 23:18:05,831 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:05,831 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-27 23:18:05,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:06,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-27 23:18:06,037 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:06,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash -583901913, now seen corresponding path program 3 times [2024-11-27 23:18:06,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:06,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866600049] [2024-11-27 23:18:06,037 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:06,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:06,061 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:18:06,062 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-27 23:18:06,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866600049] [2024-11-27 23:18:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866600049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311709640] [2024-11-27 23:18:06,218 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:06,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:06,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:06,220 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:06,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:18:06,306 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:18:06,306 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:06,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:18:06,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:18:06,326 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 23:18:06,330 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 10 treesize of output 8 [2024-11-27 23:18:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-27 23:18:06,703 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:18:06,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311709640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:06,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:18:06,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 23:18:06,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260324574] [2024-11-27 23:18:06,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:06,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:18:06,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:06,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:18:06,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:18:06,706 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:06,760 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2024-11-27 23:18:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:18:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 65 [2024-11-27 23:18:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:06,761 INFO L225 Difference]: With dead ends: 124 [2024-11-27 23:18:06,761 INFO L226 Difference]: Without dead ends: 124 [2024-11-27 23:18:06,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:18:06,762 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:06,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:18:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-27 23:18:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2024-11-27 23:18:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 93 states have (on average 1.075268817204301) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2024-11-27 23:18:06,766 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 65 [2024-11-27 23:18:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:06,766 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2024-11-27 23:18:06,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2024-11-27 23:18:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-27 23:18:06,767 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:06,767 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:06,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:06,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-27 23:18:06,972 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:06,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash 350308572, now seen corresponding path program 1 times [2024-11-27 23:18:06,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:06,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115545706] [2024-11-27 23:18:06,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:06,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 13 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 23:18:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115545706] [2024-11-27 23:18:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115545706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683503993] [2024-11-27 23:18:07,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:07,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:07,196 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:07,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:18:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:07,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:18:07,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 51 proven. 88 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 23:18:07,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 51 proven. 88 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 23:18:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683503993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:07,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:07,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-27 23:18:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563016664] [2024-11-27 23:18:07,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:07,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:18:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:07,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:18:07,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:18:07,593 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:07,918 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2024-11-27 23:18:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:18:07,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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 69 [2024-11-27 23:18:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:07,921 INFO L225 Difference]: With dead ends: 97 [2024-11-27 23:18:07,921 INFO L226 Difference]: Without dead ends: 97 [2024-11-27 23:18:07,921 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2024-11-27 23:18:07,923 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:07,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 52 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:18:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-27 23:18:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2024-11-27 23:18:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2024-11-27 23:18:07,928 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 69 [2024-11-27 23:18:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:07,928 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2024-11-27 23:18:07,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2024-11-27 23:18:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-27 23:18:07,929 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:07,929 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:07,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 23:18:08,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:08,134 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:08,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1281349460, now seen corresponding path program 2 times [2024-11-27 23:18:08,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:08,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946357690] [2024-11-27 23:18:08,135 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:08,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:08,148 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 23:18:08,148 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-11-27 23:18:08,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:08,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946357690] [2024-11-27 23:18:08,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946357690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:18:08,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:18:08,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:18:08,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98005890] [2024-11-27 23:18:08,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:18:08,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:18:08,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:08,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:18:08,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:08,220 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:08,236 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2024-11-27 23:18:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:18:08,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 73 [2024-11-27 23:18:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:08,237 INFO L225 Difference]: With dead ends: 95 [2024-11-27 23:18:08,237 INFO L226 Difference]: Without dead ends: 82 [2024-11-27 23:18:08,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:18:08,238 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:08,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:18:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-27 23:18:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-27 23:18:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2024-11-27 23:18:08,240 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 73 [2024-11-27 23:18:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:08,241 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2024-11-27 23:18:08,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2024-11-27 23:18:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-27 23:18:08,242 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:08,242 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-27 23:18:08,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-27 23:18:08,242 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:08,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:08,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2047729598, now seen corresponding path program 3 times [2024-11-27 23:18:08,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:08,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487466854] [2024-11-27 23:18:08,243 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:08,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:08,267 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:18:08,267 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-11-27 23:18:08,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487466854] [2024-11-27 23:18:08,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487466854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885919521] [2024-11-27 23:18:08,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:08,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:08,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:08,414 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:08,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:18:08,507 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 23:18:08,507 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:08,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 23:18:08,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:08,529 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 23:18:08,831 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 13 treesize of output 9 [2024-11-27 23:18:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-11-27 23:18:08,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-11-27 23:18:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885919521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:09,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:09,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-27 23:18:09,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221209435] [2024-11-27 23:18:09,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:09,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:18:09,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:09,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:18:09,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:18:09,527 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:09,632 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2024-11-27 23:18:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:18:09,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 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 79 [2024-11-27 23:18:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:09,634 INFO L225 Difference]: With dead ends: 81 [2024-11-27 23:18:09,634 INFO L226 Difference]: Without dead ends: 81 [2024-11-27 23:18:09,634 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:18:09,634 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:09,635 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:18:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-27 23:18:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-27 23:18:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-11-27 23:18:09,638 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2024-11-27 23:18:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:09,638 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-11-27 23:18:09,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-11-27 23:18:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-27 23:18:09,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:09,640 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-27 23:18:09,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 23:18:09,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-27 23:18:09,841 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:09,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash 944891959, now seen corresponding path program 1 times [2024-11-27 23:18:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:09,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532602920] [2024-11-27 23:18:09,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:09,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-27 23:18:10,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:10,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532602920] [2024-11-27 23:18:10,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532602920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:10,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412912572] [2024-11-27 23:18:10,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:10,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:10,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:10,296 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:10,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:18:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:10,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 23:18:10,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:10,446 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 23:18:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-27 23:18:10,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-27 23:18:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412912572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:11,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:11,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-27 23:18:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727594417] [2024-11-27 23:18:11,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:11,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:18:11,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:11,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:18:11,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:18:11,282 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:11,689 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2024-11-27 23:18:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:18:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 18 states have internal predecessors, (81), 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 80 [2024-11-27 23:18:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:11,691 INFO L225 Difference]: With dead ends: 111 [2024-11-27 23:18:11,691 INFO L226 Difference]: Without dead ends: 111 [2024-11-27 23:18:11,691 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-11-27 23:18:11,692 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:11,692 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 22 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:18:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-27 23:18:11,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2024-11-27 23:18:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 104 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2024-11-27 23:18:11,696 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 80 [2024-11-27 23:18:11,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:11,696 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2024-11-27 23:18:11,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2024-11-27 23:18:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-27 23:18:11,697 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:11,697 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-27 23:18:11,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 23:18:11,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-27 23:18:11,898 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:11,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:11,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1617403897, now seen corresponding path program 2 times [2024-11-27 23:18:11,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:11,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428410097] [2024-11-27 23:18:11,899 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:11,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:11,939 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:11,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 191 proven. 588 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-27 23:18:12,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:12,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428410097] [2024-11-27 23:18:12,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428410097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:12,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764860933] [2024-11-27 23:18:12,409 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:12,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:12,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:12,412 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:12,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:18:12,553 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:12,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:12,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:18:12,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 373 proven. 356 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-27 23:18:12,839 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 373 proven. 356 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-27 23:18:13,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764860933] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:13,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:13,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 25 [2024-11-27 23:18:13,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197708490] [2024-11-27 23:18:13,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:13,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 23:18:13,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:13,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 23:18:13,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-11-27 23:18:13,047 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:13,477 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2024-11-27 23:18:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-27 23:18:13,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 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 104 [2024-11-27 23:18:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:13,479 INFO L225 Difference]: With dead ends: 136 [2024-11-27 23:18:13,479 INFO L226 Difference]: Without dead ends: 136 [2024-11-27 23:18:13,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 191 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=1390, Unknown=0, NotChecked=0, Total=1806 [2024-11-27 23:18:13,480 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:13,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:18:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-27 23:18:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2024-11-27 23:18:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2024-11-27 23:18:13,484 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 104 [2024-11-27 23:18:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:13,485 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2024-11-27 23:18:13,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2024-11-27 23:18:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-27 23:18:13,486 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:13,486 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1] [2024-11-27 23:18:13,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 23:18:13,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:13,686 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:13,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash 828686726, now seen corresponding path program 3 times [2024-11-27 23:18:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:13,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849316362] [2024-11-27 23:18:13,687 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:13,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:13,757 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 23:18:13,757 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 207 proven. 651 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-27 23:18:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849316362] [2024-11-27 23:18:14,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849316362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602810950] [2024-11-27 23:18:14,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:14,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:14,268 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:14,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 23:18:14,420 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 23:18:14,420 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:14,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-27 23:18:14,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:14,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:18:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 207 proven. 651 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-27 23:18:15,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 858 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-27 23:18:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602810950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:16,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:16,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-11-27 23:18:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74935699] [2024-11-27 23:18:16,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:16,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-27 23:18:16,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:16,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-27 23:18:16,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2024-11-27 23:18:16,303 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:19,718 INFO L93 Difference]: Finished difference Result 284 states and 313 transitions. [2024-11-27 23:18:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-27 23:18:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 38 states have internal predecessors, (136), 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 127 [2024-11-27 23:18:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:19,719 INFO L225 Difference]: With dead ends: 284 [2024-11-27 23:18:19,720 INFO L226 Difference]: Without dead ends: 284 [2024-11-27 23:18:19,722 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3027 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2549, Invalid=6957, Unknown=0, NotChecked=0, Total=9506 [2024-11-27 23:18:19,722 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 325 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:19,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 21 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:18:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-27 23:18:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 233. [2024-11-27 23:18:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0862068965517242) internal successors, (252), 232 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 252 transitions. [2024-11-27 23:18:19,730 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 252 transitions. Word has length 127 [2024-11-27 23:18:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:19,730 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 252 transitions. [2024-11-27 23:18:19,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 252 transitions. [2024-11-27 23:18:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-11-27 23:18:19,732 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:19,732 INFO L218 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1] [2024-11-27 23:18:19,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 23:18:19,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:19,933 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:19,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1149098006, now seen corresponding path program 4 times [2024-11-27 23:18:19,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:19,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654361299] [2024-11-27 23:18:19,934 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:18:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:20,011 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:18:20,011 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3438 backedges. 2076 proven. 427 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2024-11-27 23:18:20,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:20,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654361299] [2024-11-27 23:18:20,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654361299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:20,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056052585] [2024-11-27 23:18:20,548 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:18:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:20,550 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:20,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 23:18:20,755 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:18:20,755 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:20,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:18:20,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3438 backedges. 2069 proven. 434 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2024-11-27 23:18:21,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3438 backedges. 2140 proven. 363 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2024-11-27 23:18:21,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056052585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:21,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:21,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 32 [2024-11-27 23:18:21,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451593012] [2024-11-27 23:18:21,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:21,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 23:18:21,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:21,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 23:18:21,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2024-11-27 23:18:21,381 INFO L87 Difference]: Start difference. First operand 233 states and 252 transitions. Second operand has 32 states, 32 states have (on average 4.53125) internal successors, (145), 32 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:22,179 INFO L93 Difference]: Finished difference Result 213 states and 224 transitions. [2024-11-27 23:18:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-27 23:18:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.53125) internal successors, (145), 32 states have internal predecessors, (145), 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 205 [2024-11-27 23:18:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:22,180 INFO L225 Difference]: With dead ends: 213 [2024-11-27 23:18:22,180 INFO L226 Difference]: Without dead ends: 213 [2024-11-27 23:18:22,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 389 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=791, Invalid=2515, Unknown=0, NotChecked=0, Total=3306 [2024-11-27 23:18:22,181 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:22,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 36 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:18:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-27 23:18:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2024-11-27 23:18:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0574162679425838) internal successors, (221), 209 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 221 transitions. [2024-11-27 23:18:22,187 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 221 transitions. Word has length 205 [2024-11-27 23:18:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:22,188 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 221 transitions. [2024-11-27 23:18:22,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.53125) internal successors, (145), 32 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 221 transitions. [2024-11-27 23:18:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2024-11-27 23:18:22,190 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:22,190 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1] [2024-11-27 23:18:22,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:22,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-27 23:18:22,391 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:22,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash -370685810, now seen corresponding path program 5 times [2024-11-27 23:18:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287628186] [2024-11-27 23:18:22,392 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:18:22,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:22,719 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-27 23:18:22,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3603 backedges. 1910 proven. 1293 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-27 23:18:23,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:23,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287628186] [2024-11-27 23:18:23,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287628186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:23,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120455606] [2024-11-27 23:18:23,491 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:18:23,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:23,494 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:23,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 23:18:23,863 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-27 23:18:23,863 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:23,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-27 23:18:23,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3603 backedges. 1910 proven. 1293 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-27 23:18:24,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3603 backedges. 1910 proven. 1293 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-27 23:18:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120455606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:24,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:24,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 43 [2024-11-27 23:18:24,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741260028] [2024-11-27 23:18:24,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:24,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-27 23:18:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:24,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-27 23:18:24,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2024-11-27 23:18:24,860 INFO L87 Difference]: Start difference. First operand 210 states and 221 transitions. Second operand has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 43 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:26,181 INFO L93 Difference]: Finished difference Result 331 states and 347 transitions. [2024-11-27 23:18:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-27 23:18:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 43 states have internal predecessors, (213), 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 209 [2024-11-27 23:18:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:26,183 INFO L225 Difference]: With dead ends: 331 [2024-11-27 23:18:26,183 INFO L226 Difference]: Without dead ends: 331 [2024-11-27 23:18:26,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 385 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1809, Invalid=7503, Unknown=0, NotChecked=0, Total=9312 [2024-11-27 23:18:26,186 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:26,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 31 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:18:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-27 23:18:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2024-11-27 23:18:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.0521472392638036) internal successors, (343), 326 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 343 transitions. [2024-11-27 23:18:26,194 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 343 transitions. Word has length 209 [2024-11-27 23:18:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:26,194 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 343 transitions. [2024-11-27 23:18:26,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 43 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 343 transitions. [2024-11-27 23:18:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2024-11-27 23:18:26,198 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:26,198 INFO L218 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-27 23:18:26,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 23:18:26,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-27 23:18:26,402 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:26,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:26,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2142135153, now seen corresponding path program 6 times [2024-11-27 23:18:26,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:26,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648832583] [2024-11-27 23:18:26,402 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:18:26,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:26,844 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-11-27 23:18:26,844 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7587 backedges. 4525 proven. 697 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2024-11-27 23:18:27,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:27,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648832583] [2024-11-27 23:18:27,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648832583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:27,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572174215] [2024-11-27 23:18:27,516 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:18:27,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:27,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:27,518 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:27,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 23:18:28,205 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-11-27 23:18:28,205 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:28,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 23:18:28,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7587 backedges. 4608 proven. 601 refuted. 0 times theorem prover too weak. 2378 trivial. 0 not checked. [2024-11-27 23:18:28,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7587 backedges. 4608 proven. 601 refuted. 0 times theorem prover too weak. 2378 trivial. 0 not checked. [2024-11-27 23:18:28,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572174215] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:28,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:28,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 25 [2024-11-27 23:18:28,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753132657] [2024-11-27 23:18:28,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:28,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 23:18:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:28,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 23:18:28,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2024-11-27 23:18:28,835 INFO L87 Difference]: Start difference. First operand 327 states and 343 transitions. Second operand has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:29,775 INFO L93 Difference]: Finished difference Result 327 states and 338 transitions. [2024-11-27 23:18:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-27 23:18:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 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 302 [2024-11-27 23:18:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:29,777 INFO L225 Difference]: With dead ends: 327 [2024-11-27 23:18:29,777 INFO L226 Difference]: Without dead ends: 327 [2024-11-27 23:18:29,778 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 584 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=829, Invalid=2593, Unknown=0, NotChecked=0, Total=3422 [2024-11-27 23:18:29,779 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:29,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:18:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-27 23:18:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2024-11-27 23:18:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.0368098159509203) internal successors, (338), 326 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 338 transitions. [2024-11-27 23:18:29,787 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 338 transitions. Word has length 302 [2024-11-27 23:18:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:29,787 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 338 transitions. [2024-11-27 23:18:29,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 338 transitions. [2024-11-27 23:18:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2024-11-27 23:18:29,796 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:29,796 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-27 23:18:29,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:29,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:29,996 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:29,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1351226119, now seen corresponding path program 7 times [2024-11-27 23:18:29,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:29,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123854102] [2024-11-27 23:18:29,997 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:18:29,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 5461 proven. 340 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2024-11-27 23:18:31,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123854102] [2024-11-27 23:18:31,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123854102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173246870] [2024-11-27 23:18:31,185 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:18:31,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:31,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:31,191 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:31,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 23:18:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:31,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:18:31,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 5598 proven. 922 refuted. 0 times theorem prover too weak. 1811 trivial. 0 not checked. [2024-11-27 23:18:32,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 5598 proven. 922 refuted. 0 times theorem prover too weak. 1811 trivial. 0 not checked. [2024-11-27 23:18:32,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173246870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:32,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:32,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 40 [2024-11-27 23:18:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304682931] [2024-11-27 23:18:32,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:32,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-27 23:18:32,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:32,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-27 23:18:32,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2024-11-27 23:18:32,635 INFO L87 Difference]: Start difference. First operand 327 states and 338 transitions. Second operand has 40 states, 40 states have (on average 5.225) internal successors, (209), 40 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:34,562 INFO L93 Difference]: Finished difference Result 327 states and 334 transitions. [2024-11-27 23:18:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-27 23:18:34,563 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.225) internal successors, (209), 40 states have internal predecessors, (209), 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 314 [2024-11-27 23:18:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:34,564 INFO L225 Difference]: With dead ends: 327 [2024-11-27 23:18:34,564 INFO L226 Difference]: Without dead ends: 327 [2024-11-27 23:18:34,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 600 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1237, Invalid=5405, Unknown=0, NotChecked=0, Total=6642 [2024-11-27 23:18:34,567 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:34,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 68 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 23:18:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-27 23:18:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2024-11-27 23:18:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.0245398773006136) internal successors, (334), 326 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 334 transitions. [2024-11-27 23:18:34,574 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 334 transitions. Word has length 314 [2024-11-27 23:18:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:34,574 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 334 transitions. [2024-11-27 23:18:34,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.225) internal successors, (209), 40 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 334 transitions. [2024-11-27 23:18:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2024-11-27 23:18:34,578 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:34,578 INFO L218 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-27 23:18:34,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 23:18:34,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:34,783 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:34,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2012628871, now seen corresponding path program 8 times [2024-11-27 23:18:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:34,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937029625] [2024-11-27 23:18:34,783 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:34,902 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:34,903 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8847 backedges. 5938 proven. 1691 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2024-11-27 23:18:35,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937029625] [2024-11-27 23:18:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937029625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879750151] [2024-11-27 23:18:35,811 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:18:35,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:35,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:35,813 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:35,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 23:18:36,143 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:18:36,143 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:36,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 23:18:36,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8847 backedges. 6291 proven. 1338 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2024-11-27 23:18:36,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8847 backedges. 6291 proven. 1338 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2024-11-27 23:18:37,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879750151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:37,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:37,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 30 [2024-11-27 23:18:37,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951589407] [2024-11-27 23:18:37,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:37,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-27 23:18:37,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:37,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-27 23:18:37,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2024-11-27 23:18:37,089 INFO L87 Difference]: Start difference. First operand 327 states and 334 transitions. Second operand has 30 states, 30 states have (on average 5.9) internal successors, (177), 30 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:38,098 INFO L93 Difference]: Finished difference Result 327 states and 331 transitions. [2024-11-27 23:18:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-27 23:18:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.9) internal successors, (177), 30 states have internal predecessors, (177), 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 322 [2024-11-27 23:18:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:38,100 INFO L225 Difference]: With dead ends: 327 [2024-11-27 23:18:38,100 INFO L226 Difference]: Without dead ends: 327 [2024-11-27 23:18:38,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 618 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1446, Invalid=4104, Unknown=0, NotChecked=0, Total=5550 [2024-11-27 23:18:38,102 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:38,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 84 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:18:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-27 23:18:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2024-11-27 23:18:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.0153374233128833) internal successors, (331), 326 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 331 transitions. [2024-11-27 23:18:38,113 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 331 transitions. Word has length 322 [2024-11-27 23:18:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:38,114 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 331 transitions. [2024-11-27 23:18:38,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.9) internal successors, (177), 30 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 331 transitions. [2024-11-27 23:18:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2024-11-27 23:18:38,118 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:38,118 INFO L218 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-27 23:18:38,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-27 23:18:38,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:38,323 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:38,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1010231425, now seen corresponding path program 9 times [2024-11-27 23:18:38,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:38,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414860496] [2024-11-27 23:18:38,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:38,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:38,411 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-27 23:18:38,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9111 backedges. 0 proven. 2631 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2024-11-27 23:18:38,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:38,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414860496] [2024-11-27 23:18:38,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414860496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:38,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799223623] [2024-11-27 23:18:38,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:38,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:38,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:38,947 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:38,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 23:18:39,308 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-27 23:18:39,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:39,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:18:39,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:39,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:18:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9111 backedges. 0 proven. 2631 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2024-11-27 23:18:40,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9111 backedges. 0 proven. 2631 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2024-11-27 23:18:42,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799223623] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:42,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:42,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2024-11-27 23:18:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471812359] [2024-11-27 23:18:42,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:42,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-27 23:18:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:42,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-27 23:18:42,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1115, Unknown=0, NotChecked=0, Total=1640 [2024-11-27 23:18:42,179 INFO L87 Difference]: Start difference. First operand 327 states and 331 transitions. Second operand has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:43,017 INFO L93 Difference]: Finished difference Result 437 states and 465 transitions. [2024-11-27 23:18:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 23:18:43,018 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 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 326 [2024-11-27 23:18:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:43,020 INFO L225 Difference]: With dead ends: 437 [2024-11-27 23:18:43,020 INFO L226 Difference]: Without dead ends: 437 [2024-11-27 23:18:43,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1214, Invalid=2692, Unknown=0, NotChecked=0, Total=3906 [2024-11-27 23:18:43,022 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:43,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 32 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:18:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-27 23:18:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 375. [2024-11-27 23:18:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.0454545454545454) internal successors, (391), 374 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 391 transitions. [2024-11-27 23:18:43,033 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 391 transitions. Word has length 326 [2024-11-27 23:18:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:43,034 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 391 transitions. [2024-11-27 23:18:43,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 391 transitions. [2024-11-27 23:18:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2024-11-27 23:18:43,036 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:43,036 INFO L218 NwaCegarLoop]: trace histogram [77, 77, 76, 76, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-27 23:18:43,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:43,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:43,237 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:43,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash 861464351, now seen corresponding path program 10 times [2024-11-27 23:18:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075705182] [2024-11-27 23:18:43,238 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:18:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:43,326 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:18:43,327 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12591 backedges. 1031 proven. 10852 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2024-11-27 23:18:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075705182] [2024-11-27 23:18:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075705182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:45,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182604645] [2024-11-27 23:18:45,021 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:18:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:45,025 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:45,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 23:18:45,369 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:18:45,369 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:45,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-27 23:18:45,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12591 backedges. 3349 proven. 8292 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-11-27 23:18:46,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12591 backedges. 3349 proven. 8292 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-11-27 23:18:47,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182604645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:47,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:47,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27, 27] total 57 [2024-11-27 23:18:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863906834] [2024-11-27 23:18:47,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:47,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-27 23:18:47,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:47,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-27 23:18:47,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=2607, Unknown=0, NotChecked=0, Total=3192 [2024-11-27 23:18:47,137 INFO L87 Difference]: Start difference. First operand 375 states and 391 transitions. Second operand has 57 states, 57 states have (on average 4.7894736842105265) internal successors, (273), 57 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:50,129 INFO L93 Difference]: Finished difference Result 532 states and 553 transitions. [2024-11-27 23:18:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2024-11-27 23:18:50,130 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.7894736842105265) internal successors, (273), 57 states have internal predecessors, (273), 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 374 [2024-11-27 23:18:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:50,131 INFO L225 Difference]: With dead ends: 532 [2024-11-27 23:18:50,131 INFO L226 Difference]: Without dead ends: 532 [2024-11-27 23:18:50,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 708 SyntacticMatches, 21 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10072 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4210, Invalid=23846, Unknown=0, NotChecked=0, Total=28056 [2024-11-27 23:18:50,136 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 80 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:50,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 43 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 23:18:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-11-27 23:18:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 473. [2024-11-27 23:18:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.0423728813559323) internal successors, (492), 472 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 492 transitions. [2024-11-27 23:18:50,145 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 492 transitions. Word has length 374 [2024-11-27 23:18:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:50,146 INFO L471 AbstractCegarLoop]: Abstraction has 473 states and 492 transitions. [2024-11-27 23:18:50,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.7894736842105265) internal successors, (273), 57 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 492 transitions. [2024-11-27 23:18:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2024-11-27 23:18:50,148 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:50,149 INFO L218 NwaCegarLoop]: trace histogram [86, 86, 85, 85, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1] [2024-11-27 23:18:50,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:50,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-27 23:18:50,349 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:50,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2135906714, now seen corresponding path program 11 times [2024-11-27 23:18:50,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:50,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753057173] [2024-11-27 23:18:50,350 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:18:50,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:51,089 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-27 23:18:51,089 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15730 backedges. 10296 proven. 529 refuted. 0 times theorem prover too weak. 4905 trivial. 0 not checked. [2024-11-27 23:18:52,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753057173] [2024-11-27 23:18:52,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753057173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:18:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394747386] [2024-11-27 23:18:52,421 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:18:52,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:52,426 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:52,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 23:18:54,749 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-27 23:18:54,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:54,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 23:18:54,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15730 backedges. 10945 proven. 2155 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2024-11-27 23:18:55,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15730 backedges. 11323 proven. 1777 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2024-11-27 23:18:55,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394747386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:55,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:18:55,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2024-11-27 23:18:55,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876478007] [2024-11-27 23:18:55,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:55,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-27 23:18:55,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:55,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-27 23:18:55,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1678, Unknown=0, NotChecked=0, Total=2070 [2024-11-27 23:18:55,932 INFO L87 Difference]: Start difference. First operand 473 states and 492 transitions. Second operand has 46 states, 46 states have (on average 5.086956521739131) internal successors, (234), 46 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:58,290 INFO L93 Difference]: Finished difference Result 426 states and 440 transitions. [2024-11-27 23:18:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-27 23:18:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.086956521739131) internal successors, (234), 46 states have internal predecessors, (234), 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 417 [2024-11-27 23:18:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:58,292 INFO L225 Difference]: With dead ends: 426 [2024-11-27 23:18:58,292 INFO L226 Difference]: Without dead ends: 426 [2024-11-27 23:18:58,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 795 SyntacticMatches, 17 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2447, Invalid=9109, Unknown=0, NotChecked=0, Total=11556 [2024-11-27 23:18:58,294 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:58,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 58 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 23:18:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-27 23:18:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2024-11-27 23:18:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.035294117647059) internal successors, (440), 425 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 440 transitions. [2024-11-27 23:18:58,303 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 440 transitions. Word has length 417 [2024-11-27 23:18:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:58,304 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 440 transitions. [2024-11-27 23:18:58,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.086956521739131) internal successors, (234), 46 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:18:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 440 transitions. [2024-11-27 23:18:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2024-11-27 23:18:58,306 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:58,306 INFO L218 NwaCegarLoop]: trace histogram [87, 87, 86, 86, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1] [2024-11-27 23:18:58,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-27 23:18:58,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-27 23:18:58,507 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:18:58,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash 836169438, now seen corresponding path program 12 times [2024-11-27 23:18:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:58,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752462273] [2024-11-27 23:18:58,508 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:18:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:59,269 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-11-27 23:18:59,269 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16083 backedges. 43 proven. 8657 refuted. 0 times theorem prover too weak. 7383 trivial. 0 not checked. [2024-11-27 23:19:01,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:01,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752462273] [2024-11-27 23:19:01,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752462273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:01,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249912519] [2024-11-27 23:19:01,110 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:19:01,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:01,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:01,112 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:01,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 23:19:02,476 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-11-27 23:19:02,476 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:02,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-27 23:19:02,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:02,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:19:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16083 backedges. 2412 proven. 6288 refuted. 0 times theorem prover too weak. 7383 trivial. 0 not checked. [2024-11-27 23:19:04,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16083 backedges. 0 proven. 8700 refuted. 0 times theorem prover too weak. 7383 trivial. 0 not checked. [2024-11-27 23:19:06,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249912519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:06,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:06,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2024-11-27 23:19:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669663846] [2024-11-27 23:19:06,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:06,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-27 23:19:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:06,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-27 23:19:06,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=2444, Unknown=0, NotChecked=0, Total=3080 [2024-11-27 23:19:06,938 INFO L87 Difference]: Start difference. First operand 426 states and 440 transitions. Second operand has 56 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:19:17,693 INFO L93 Difference]: Finished difference Result 722 states and 775 transitions. [2024-11-27 23:19:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-11-27 23:19:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 56 states have internal predecessors, (208), 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 421 [2024-11-27 23:19:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:19:17,696 INFO L225 Difference]: With dead ends: 722 [2024-11-27 23:19:17,696 INFO L226 Difference]: Without dead ends: 722 [2024-11-27 23:19:17,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 991 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11745 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=9266, Invalid=25890, Unknown=0, NotChecked=0, Total=35156 [2024-11-27 23:19:17,699 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 688 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:19:17,700 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 26 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:19:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2024-11-27 23:19:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 623. [2024-11-27 23:19:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.0514469453376205) internal successors, (654), 622 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 654 transitions. [2024-11-27 23:19:17,713 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 654 transitions. Word has length 421 [2024-11-27 23:19:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:19:17,713 INFO L471 AbstractCegarLoop]: Abstraction has 623 states and 654 transitions. [2024-11-27 23:19:17,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 654 transitions. [2024-11-27 23:19:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2024-11-27 23:19:17,717 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:19:17,717 INFO L218 NwaCegarLoop]: trace histogram [121, 121, 120, 120, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-27 23:19:17,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-27 23:19:17,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-27 23:19:17,919 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:19:17,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash 627201694, now seen corresponding path program 13 times [2024-11-27 23:19:17,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:17,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472486145] [2024-11-27 23:19:17,920 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:19:17,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30858 backedges. 22020 proven. 3926 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2024-11-27 23:19:19,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472486145] [2024-11-27 23:19:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472486145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259402859] [2024-11-27 23:19:19,572 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:19:19,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:19,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:19,574 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:19,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-27 23:19:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:20,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 23:19:20,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30858 backedges. 22670 proven. 3276 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2024-11-27 23:19:21,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30858 backedges. 22670 proven. 3276 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2024-11-27 23:19:21,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259402859] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:21,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:21,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 39 [2024-11-27 23:19:21,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173915794] [2024-11-27 23:19:21,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:21,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-27 23:19:21,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:21,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-27 23:19:21,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 23:19:21,672 INFO L87 Difference]: Start difference. First operand 623 states and 654 transitions. Second operand has 39 states, 39 states have (on average 6.0) internal successors, (234), 39 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:19:23,812 INFO L93 Difference]: Finished difference Result 579 states and 602 transitions. [2024-11-27 23:19:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-27 23:19:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.0) internal successors, (234), 39 states have internal predecessors, (234), 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 571 [2024-11-27 23:19:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:19:23,815 INFO L225 Difference]: With dead ends: 579 [2024-11-27 23:19:23,815 INFO L226 Difference]: Without dead ends: 579 [2024-11-27 23:19:23,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1107 SyntacticMatches, 21 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3641, Invalid=9931, Unknown=0, NotChecked=0, Total=13572 [2024-11-27 23:19:23,817 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 71 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:19:23,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 132 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 23:19:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-27 23:19:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 576. [2024-11-27 23:19:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.0417391304347825) internal successors, (599), 575 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 599 transitions. [2024-11-27 23:19:23,826 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 599 transitions. Word has length 571 [2024-11-27 23:19:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:19:23,826 INFO L471 AbstractCegarLoop]: Abstraction has 576 states and 599 transitions. [2024-11-27 23:19:23,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.0) internal successors, (234), 39 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 599 transitions. [2024-11-27 23:19:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2024-11-27 23:19:23,830 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:19:23,830 INFO L218 NwaCegarLoop]: trace histogram [122, 122, 121, 121, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-27 23:19:23,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-27 23:19:24,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-27 23:19:24,031 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:19:24,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash 674439958, now seen corresponding path program 14 times [2024-11-27 23:19:24,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:24,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927840445] [2024-11-27 23:19:24,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:19:24,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:24,197 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:19:24,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 31353 backedges. 2211 proven. 27898 refuted. 0 times theorem prover too weak. 1244 trivial. 0 not checked. [2024-11-27 23:19:28,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:28,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927840445] [2024-11-27 23:19:28,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927840445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:28,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195095363] [2024-11-27 23:19:28,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:19:28,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:28,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:28,315 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:28,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-27 23:19:28,852 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:19:28,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:28,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 2005 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 23:19:28,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31353 backedges. 12207 proven. 15972 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2024-11-27 23:19:29,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 31353 backedges. 12207 proven. 15972 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2024-11-27 23:19:30,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195095363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:30,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:30,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 28, 28] total 83 [2024-11-27 23:19:30,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905813198] [2024-11-27 23:19:30,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:30,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-27 23:19:30,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:30,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-27 23:19:30,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=5684, Unknown=0, NotChecked=0, Total=6806 [2024-11-27 23:19:30,841 INFO L87 Difference]: Start difference. First operand 576 states and 599 transitions. Second operand has 83 states, 83 states have (on average 5.0120481927710845) internal successors, (416), 83 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:19:34,345 INFO L93 Difference]: Finished difference Result 639 states and 662 transitions. [2024-11-27 23:19:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-27 23:19:34,345 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 5.0120481927710845) internal successors, (416), 83 states have internal predecessors, (416), 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 575 [2024-11-27 23:19:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:19:34,348 INFO L225 Difference]: With dead ends: 639 [2024-11-27 23:19:34,348 INFO L226 Difference]: Without dead ends: 639 [2024-11-27 23:19:34,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1111 SyntacticMatches, 17 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12469 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6458, Invalid=27582, Unknown=0, NotChecked=0, Total=34040 [2024-11-27 23:19:34,352 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:19:34,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-27 23:19:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2024-11-27 23:19:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 635. [2024-11-27 23:19:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.0378548895899053) internal successors, (658), 634 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 658 transitions. [2024-11-27 23:19:34,363 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 658 transitions. Word has length 575 [2024-11-27 23:19:34,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:19:34,364 INFO L471 AbstractCegarLoop]: Abstraction has 635 states and 658 transitions. [2024-11-27 23:19:34,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 5.0120481927710845) internal successors, (416), 83 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:19:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 658 transitions. [2024-11-27 23:19:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2024-11-27 23:19:34,368 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:19:34,368 INFO L218 NwaCegarLoop]: trace histogram [134, 134, 133, 133, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1] [2024-11-27 23:19:34,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-27 23:19:34,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-27 23:19:34,569 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:19:34,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1221100727, now seen corresponding path program 15 times [2024-11-27 23:19:34,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:34,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844874602] [2024-11-27 23:19:34,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:19:34,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:34,783 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-27 23:19:34,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 37825 backedges. 11201 proven. 11817 refuted. 0 times theorem prover too weak. 14807 trivial. 0 not checked. [2024-11-27 23:19:35,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844874602] [2024-11-27 23:19:35,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844874602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:19:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224089533] [2024-11-27 23:19:35,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:19:35,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:35,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:35,958 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:35,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-27 23:19:36,824 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-27 23:19:36,824 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:19:36,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 23:19:36,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:36,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:19:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 37825 backedges. 11201 proven. 11817 refuted. 0 times theorem prover too weak. 14807 trivial. 0 not checked. [2024-11-27 23:19:39,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 37825 backedges. 0 proven. 23018 refuted. 0 times theorem prover too weak. 14807 trivial. 0 not checked. [2024-11-27 23:19:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224089533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:42,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:19:42,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2024-11-27 23:19:42,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030124676] [2024-11-27 23:19:42,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:42,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-27 23:19:42,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:42,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-27 23:19:42,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2024-11-27 23:19:42,762 INFO L87 Difference]: Start difference. First operand 635 states and 658 transitions. Second operand has 65 states, 64 states have (on average 4.140625) internal successors, (265), 65 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:08,999 INFO L93 Difference]: Finished difference Result 1373 states and 1492 transitions. [2024-11-27 23:20:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2024-11-27 23:20:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 4.140625) internal successors, (265), 65 states have internal predecessors, (265), 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 630 [2024-11-27 23:20:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:09,004 INFO L225 Difference]: With dead ends: 1373 [2024-11-27 23:20:09,004 INFO L226 Difference]: Without dead ends: 1373 [2024-11-27 23:20:09,008 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1504 GetRequests, 1217 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32627 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=22235, Invalid=60997, Unknown=0, NotChecked=0, Total=83232 [2024-11-27 23:20:09,010 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 899 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:09,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 32 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:20:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2024-11-27 23:20:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 953. [2024-11-27 23:20:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 1.0588235294117647) internal successors, (1008), 952 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1008 transitions. [2024-11-27 23:20:09,033 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1008 transitions. Word has length 630 [2024-11-27 23:20:09,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:09,033 INFO L471 AbstractCegarLoop]: Abstraction has 953 states and 1008 transitions. [2024-11-27 23:20:09,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 4.140625) internal successors, (265), 65 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:09,034 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1008 transitions. [2024-11-27 23:20:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2024-11-27 23:20:09,042 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:20:09,042 INFO L218 NwaCegarLoop]: trace histogram [191, 191, 190, 190, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1] [2024-11-27 23:20:09,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-27 23:20:09,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-27 23:20:09,243 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:20:09,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash -919202290, now seen corresponding path program 16 times [2024-11-27 23:20:09,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:09,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799402221] [2024-11-27 23:20:09,244 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:20:09,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:09,620 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:20:09,621 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 76318 backedges. 46415 proven. 1122 refuted. 0 times theorem prover too weak. 28781 trivial. 0 not checked. [2024-11-27 23:20:12,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799402221] [2024-11-27 23:20:12,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799402221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253661940] [2024-11-27 23:20:12,077 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:20:12,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:12,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:12,079 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:12,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-27 23:20:12,977 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:20:12,977 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:12,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 2733 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 23:20:13,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 76318 backedges. 53520 proven. 5730 refuted. 0 times theorem prover too weak. 17068 trivial. 0 not checked. [2024-11-27 23:20:15,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 76318 backedges. 53987 proven. 5263 refuted. 0 times theorem prover too weak. 17068 trivial. 0 not checked. [2024-11-27 23:20:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253661940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:20:17,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:20:17,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2024-11-27 23:20:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352010306] [2024-11-27 23:20:17,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:17,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-27 23:20:17,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:17,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-27 23:20:17,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=3024, Unknown=0, NotChecked=0, Total=3660 [2024-11-27 23:20:17,040 INFO L87 Difference]: Start difference. First operand 953 states and 1008 transitions. Second operand has 61 states, 61 states have (on average 5.409836065573771) internal successors, (330), 61 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:29,639 INFO L93 Difference]: Finished difference Result 908 states and 952 transitions. [2024-11-27 23:20:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-27 23:20:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.409836065573771) internal successors, (330), 61 states have internal predecessors, (330), 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 879 [2024-11-27 23:20:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:29,643 INFO L225 Difference]: With dead ends: 908 [2024-11-27 23:20:29,643 INFO L226 Difference]: Without dead ends: 908 [2024-11-27 23:20:29,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1905 GetRequests, 1703 SyntacticMatches, 25 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9864 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=5872, Invalid=25990, Unknown=0, NotChecked=0, Total=31862 [2024-11-27 23:20:29,646 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6804 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 6820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 6804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:29,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 112 Invalid, 6820 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [16 Valid, 6804 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-27 23:20:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2024-11-27 23:20:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 902. [2024-11-27 23:20:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 1.0499445061043284) internal successors, (946), 901 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 946 transitions. [2024-11-27 23:20:29,668 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 946 transitions. Word has length 879 [2024-11-27 23:20:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:29,669 INFO L471 AbstractCegarLoop]: Abstraction has 902 states and 946 transitions. [2024-11-27 23:20:29,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.409836065573771) internal successors, (330), 61 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 946 transitions. [2024-11-27 23:20:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 888 [2024-11-27 23:20:29,679 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:20:29,680 INFO L218 NwaCegarLoop]: trace histogram [193, 193, 192, 192, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1] [2024-11-27 23:20:29,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-27 23:20:29,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-27 23:20:29,884 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:20:29,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:29,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1099876750, now seen corresponding path program 17 times [2024-11-27 23:20:29,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:29,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234050550] [2024-11-27 23:20:29,886 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:20:29,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:33,804 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-27 23:20:33,804 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 77880 backedges. 47855 proven. 1244 refuted. 0 times theorem prover too weak. 28781 trivial. 0 not checked. [2024-11-27 23:20:37,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:37,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234050550] [2024-11-27 23:20:37,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234050550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:37,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103153371] [2024-11-27 23:20:37,480 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:20:37,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:37,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:37,484 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:37,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-27 23:21:11,233 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-27 23:21:11,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:21:11,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 2524 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 23:21:11,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:21:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 77880 backedges. 57275 proven. 7474 refuted. 0 times theorem prover too weak. 13131 trivial. 0 not checked. [2024-11-27 23:21:13,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:21:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 77880 backedges. 58563 proven. 6186 refuted. 0 times theorem prover too weak. 13131 trivial. 0 not checked. [2024-11-27 23:21:14,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103153371] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:21:14,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:21:14,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2024-11-27 23:21:14,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730142384] [2024-11-27 23:21:14,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:21:14,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-27 23:21:14,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:21:14,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-27 23:21:14,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2024-11-27 23:21:14,578 INFO L87 Difference]: Start difference. First operand 902 states and 946 transitions. Second operand has 66 states, 66 states have (on average 5.181818181818182) internal successors, (342), 66 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:21:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:21:23,835 INFO L93 Difference]: Finished difference Result 909 states and 950 transitions. [2024-11-27 23:21:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2024-11-27 23:21:23,835 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 5.181818181818182) internal successors, (342), 66 states have internal predecessors, (342), 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 887 [2024-11-27 23:21:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:21:23,837 INFO L225 Difference]: With dead ends: 909 [2024-11-27 23:21:23,838 INFO L226 Difference]: Without dead ends: 909 [2024-11-27 23:21:23,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1932 GetRequests, 1715 SyntacticMatches, 26 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11038 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=7300, Invalid=29756, Unknown=0, NotChecked=0, Total=37056 [2024-11-27 23:21:23,840 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5377 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 5389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:21:23,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 119 Invalid, 5389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5377 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-27 23:21:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2024-11-27 23:21:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 906. [2024-11-27 23:21:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 1.0464088397790055) internal successors, (947), 905 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:21:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 947 transitions. [2024-11-27 23:21:23,853 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 947 transitions. Word has length 887 [2024-11-27 23:21:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:21:23,854 INFO L471 AbstractCegarLoop]: Abstraction has 906 states and 947 transitions. [2024-11-27 23:21:23,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 5.181818181818182) internal successors, (342), 66 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:21:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 947 transitions. [2024-11-27 23:21:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2024-11-27 23:21:23,861 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:21:23,861 INFO L218 NwaCegarLoop]: trace histogram [194, 194, 193, 193, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1] [2024-11-27 23:21:23,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-27 23:21:24,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:21:24,063 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:21:24,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:21:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 884645526, now seen corresponding path program 18 times [2024-11-27 23:21:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:21:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638740718] [2024-11-27 23:21:24,066 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:21:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:21:25,656 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-27 23:21:25,656 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:21:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 78667 backedges. 3989 proven. 68904 refuted. 0 times theorem prover too weak. 5774 trivial. 0 not checked. [2024-11-27 23:21:32,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:21:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638740718] [2024-11-27 23:21:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638740718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:21:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869935163] [2024-11-27 23:21:32,369 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:21:32,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:21:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:21:32,371 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:21:32,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-27 23:21:37,365 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-27 23:21:37,365 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:21:37,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 23:21:37,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:21:37,429 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 23:21:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 78667 backedges. 43 proven. 72710 refuted. 0 times theorem prover too weak. 5914 trivial. 0 not checked. [2024-11-27 23:21:44,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:21:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 78667 backedges. 0 proven. 72753 refuted. 0 times theorem prover too weak. 5914 trivial. 0 not checked. [2024-11-27 23:21:51,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869935163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:21:51,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:21:51,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22, 22] total 79 [2024-11-27 23:21:51,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890126463] [2024-11-27 23:21:51,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:21:51,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-27 23:21:51,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:21:51,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-27 23:21:51,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1617, Invalid=4703, Unknown=0, NotChecked=0, Total=6320 [2024-11-27 23:21:51,801 INFO L87 Difference]: Start difference. First operand 906 states and 947 transitions. Second operand has 80 states, 79 states have (on average 7.556962025316456) internal successors, (597), 80 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:42,868 INFO L93 Difference]: Finished difference Result 6246 states and 6863 transitions. [2024-11-27 23:22:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2024-11-27 23:22:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 7.556962025316456) internal successors, (597), 80 states have internal predecessors, (597), 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 891 [2024-11-27 23:22:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:42,887 INFO L225 Difference]: With dead ends: 6246 [2024-11-27 23:22:42,887 INFO L226 Difference]: Without dead ends: 6246 [2024-11-27 23:22:42,900 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2137 GetRequests, 1739 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59789 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=28103, Invalid=131497, Unknown=0, NotChecked=0, Total=159600 [2024-11-27 23:22:42,901 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 1733 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4527 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 4929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 4527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:42,901 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1733 Valid, 108 Invalid, 4929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 4527 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-27 23:22:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2024-11-27 23:22:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 1911. [2024-11-27 23:22:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 1.0298429319371727) internal successors, (1967), 1910 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 1967 transitions. [2024-11-27 23:22:42,959 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 1967 transitions. Word has length 891 [2024-11-27 23:22:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:42,960 INFO L471 AbstractCegarLoop]: Abstraction has 1911 states and 1967 transitions. [2024-11-27 23:22:42,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 7.556962025316456) internal successors, (597), 80 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 1967 transitions. [2024-11-27 23:22:42,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1897 [2024-11-27 23:22:42,986 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:42,988 INFO L218 NwaCegarLoop]: trace histogram [419, 419, 418, 418, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:22:43,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-27 23:22:43,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-27 23:22:43,189 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:22:43,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 897544079, now seen corresponding path program 19 times [2024-11-27 23:22:43,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:43,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437938291] [2024-11-27 23:22:43,190 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:22:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 366172 backedges. 145948 proven. 1476 refuted. 0 times theorem prover too weak. 218748 trivial. 0 not checked. [2024-11-27 23:22:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437938291] [2024-11-27 23:22:54,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437938291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557665388] [2024-11-27 23:22:54,931 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:22:54,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:54,937 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:54,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-27 23:22:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:57,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 6474 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 23:22:57,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 366172 backedges. 188803 proven. 7918 refuted. 0 times theorem prover too weak. 169451 trivial. 0 not checked. [2024-11-27 23:22:59,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 366172 backedges. 188803 proven. 7918 refuted. 0 times theorem prover too weak. 169451 trivial. 0 not checked. [2024-11-27 23:23:01,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557665388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:01,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 65 [2024-11-27 23:23:01,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137799732] [2024-11-27 23:23:01,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:01,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-27 23:23:01,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:01,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-27 23:23:01,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2024-11-27 23:23:01,784 INFO L87 Difference]: Start difference. First operand 1911 states and 1967 transitions. Second operand has 65 states, 65 states have (on average 5.661538461538462) internal successors, (368), 65 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:15,295 INFO L93 Difference]: Finished difference Result 2098 states and 2153 transitions. [2024-11-27 23:23:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2024-11-27 23:23:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.661538461538462) internal successors, (368), 65 states have internal predecessors, (368), 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 1896 [2024-11-27 23:23:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:15,301 INFO L225 Difference]: With dead ends: 2098 [2024-11-27 23:23:15,301 INFO L226 Difference]: Without dead ends: 2098 [2024-11-27 23:23:15,304 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3976 GetRequests, 3733 SyntacticMatches, 29 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14503 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=8067, Invalid=38373, Unknown=0, NotChecked=0, Total=46440 [2024-11-27 23:23:15,305 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 88 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9176 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 9191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 9176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:15,305 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 102 Invalid, 9191 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 9176 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-27 23:23:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2024-11-27 23:23:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1985. [2024-11-27 23:23:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.0277217741935485) internal successors, (2039), 1984 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2039 transitions. [2024-11-27 23:23:15,342 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2039 transitions. Word has length 1896 [2024-11-27 23:23:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:15,343 INFO L471 AbstractCegarLoop]: Abstraction has 1985 states and 2039 transitions. [2024-11-27 23:23:15,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.661538461538462) internal successors, (368), 65 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2039 transitions. [2024-11-27 23:23:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1957 [2024-11-27 23:23:15,379 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:15,380 INFO L218 NwaCegarLoop]: trace histogram [434, 434, 433, 433, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:23:15,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:15,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-27 23:23:15,582 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:23:15,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:15,583 INFO L85 PathProgramCache]: Analyzing trace with hash 964512663, now seen corresponding path program 20 times [2024-11-27 23:23:15,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:15,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806430762] [2024-11-27 23:23:15,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:15,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:17,283 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:17,283 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 392182 backedges. 154780 proven. 1663 refuted. 0 times theorem prover too weak. 235739 trivial. 0 not checked. [2024-11-27 23:23:28,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:28,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806430762] [2024-11-27 23:23:28,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806430762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:28,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188754651] [2024-11-27 23:23:28,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:28,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:28,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:28,067 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:28,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-27 23:23:29,931 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:29,931 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:29,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 6669 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 23:23:29,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 392182 backedges. 215401 proven. 9526 refuted. 0 times theorem prover too weak. 167255 trivial. 0 not checked. [2024-11-27 23:23:32,614 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 392182 backedges. 215401 proven. 9526 refuted. 0 times theorem prover too weak. 167255 trivial. 0 not checked. [2024-11-27 23:23:35,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188754651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:23:35,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:23:35,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 85 [2024-11-27 23:23:35,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162116183] [2024-11-27 23:23:35,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:35,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-27 23:23:35,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:35,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-27 23:23:35,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=6000, Unknown=0, NotChecked=0, Total=7140 [2024-11-27 23:23:35,413 INFO L87 Difference]: Start difference. First operand 1985 states and 2039 transitions. Second operand has 85 states, 85 states have (on average 5.317647058823529) internal successors, (452), 85 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:54,730 INFO L93 Difference]: Finished difference Result 2318 states and 2373 transitions. [2024-11-27 23:23:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2024-11-27 23:23:54,731 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 5.317647058823529) internal successors, (452), 85 states have internal predecessors, (452), 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 1956 [2024-11-27 23:23:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:54,735 INFO L225 Difference]: With dead ends: 2318 [2024-11-27 23:23:54,735 INFO L226 Difference]: Without dead ends: 2318 [2024-11-27 23:23:54,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4117 GetRequests, 3848 SyntacticMatches, 16 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17342 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=11064, Invalid=53706, Unknown=0, NotChecked=0, Total=64770 [2024-11-27 23:23:54,739 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 11665 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 11689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 11665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:54,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 133 Invalid, 11689 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 11665 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2024-11-27 23:23:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2024-11-27 23:23:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2126. [2024-11-27 23:23:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 1.0254117647058822) internal successors, (2179), 2125 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 2179 transitions. [2024-11-27 23:23:54,772 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 2179 transitions. Word has length 1956 [2024-11-27 23:23:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:54,773 INFO L471 AbstractCegarLoop]: Abstraction has 2126 states and 2179 transitions. [2024-11-27 23:23:54,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 5.317647058823529) internal successors, (452), 85 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:23:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 2179 transitions. [2024-11-27 23:23:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2013 [2024-11-27 23:23:54,804 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:54,805 INFO L218 NwaCegarLoop]: trace histogram [448, 448, 447, 447, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:23:54,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-27 23:23:55,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-27 23:23:55,006 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:23:55,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1784392983, now seen corresponding path program 21 times [2024-11-27 23:23:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14104816] [2024-11-27 23:23:55,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:23:55,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:55,590 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-27 23:23:55,590 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 417270 backedges. 0 proven. 40378 refuted. 0 times theorem prover too weak. 376892 trivial. 0 not checked. [2024-11-27 23:23:57,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14104816] [2024-11-27 23:23:57,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14104816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931219724] [2024-11-27 23:23:57,965 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:23:57,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:57,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:57,967 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:57,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-27 23:24:01,912 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-27 23:24:01,913 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:01,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 23:24:01,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:01,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:24:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 417270 backedges. 0 proven. 40378 refuted. 0 times theorem prover too weak. 376892 trivial. 0 not checked. [2024-11-27 23:24:18,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:24:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 417270 backedges. 0 proven. 40378 refuted. 0 times theorem prover too weak. 376892 trivial. 0 not checked. [2024-11-27 23:24:40,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931219724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:24:40,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:24:40,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2024-11-27 23:24:40,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113409090] [2024-11-27 23:24:40,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:24:40,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-27 23:24:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:24:40,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-27 23:24:40,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1734, Invalid=4118, Unknown=0, NotChecked=0, Total=5852 [2024-11-27 23:24:40,614 INFO L87 Difference]: Start difference. First operand 2126 states and 2179 transitions. Second operand has 77 states, 76 states have (on average 4.118421052631579) internal successors, (313), 77 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:43,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:24:43,755 INFO L93 Difference]: Finished difference Result 3662 states and 3988 transitions. [2024-11-27 23:24:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-27 23:24:43,756 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 4.118421052631579) internal successors, (313), 77 states have internal predecessors, (313), 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 2012 [2024-11-27 23:24:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:24:43,765 INFO L225 Difference]: With dead ends: 3662 [2024-11-27 23:24:43,765 INFO L226 Difference]: Without dead ends: 3662 [2024-11-27 23:24:43,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4080 GetRequests, 3973 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3476, Invalid=8296, Unknown=0, NotChecked=0, Total=11772 [2024-11-27 23:24:43,767 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 362 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:24:43,768 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 28 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:24:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2024-11-27 23:24:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 2152. [2024-11-27 23:24:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.0264993026499303) internal successors, (2208), 2151 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2208 transitions. [2024-11-27 23:24:43,811 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2208 transitions. Word has length 2012 [2024-11-27 23:24:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:24:43,814 INFO L471 AbstractCegarLoop]: Abstraction has 2152 states and 2208 transitions. [2024-11-27 23:24:43,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 4.118421052631579) internal successors, (313), 77 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:24:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2208 transitions. [2024-11-27 23:24:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2053 [2024-11-27 23:24:43,849 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:24:43,849 INFO L218 NwaCegarLoop]: trace histogram [458, 458, 457, 457, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:24:43,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-27 23:24:44,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-27 23:24:44,050 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:24:44,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:24:44,051 INFO L85 PathProgramCache]: Analyzing trace with hash -777165625, now seen corresponding path program 22 times [2024-11-27 23:24:44,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:24:44,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999242761] [2024-11-27 23:24:44,052 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:24:44,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:24:45,475 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:24:45,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 435670 backedges. 178587 proven. 1870 refuted. 0 times theorem prover too weak. 255213 trivial. 0 not checked. [2024-11-27 23:24:53,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:24:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999242761] [2024-11-27 23:24:53,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999242761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:24:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641412666] [2024-11-27 23:24:53,835 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:24:53,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:24:53,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:24:53,837 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:24:53,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-27 23:24:56,087 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:24:56,088 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:24:56,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 6342 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-27 23:24:56,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:24:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 435670 backedges. 249195 proven. 12122 refuted. 0 times theorem prover too weak. 174353 trivial. 0 not checked. [2024-11-27 23:24:59,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:25:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 435670 backedges. 249980 proven. 11337 refuted. 0 times theorem prover too weak. 174353 trivial. 0 not checked. [2024-11-27 23:25:02,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641412666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:25:02,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:25:02,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 94 [2024-11-27 23:25:02,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743223845] [2024-11-27 23:25:02,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:25:02,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-27 23:25:02,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:25:02,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-27 23:25:02,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=7387, Unknown=0, NotChecked=0, Total=8742 [2024-11-27 23:25:02,693 INFO L87 Difference]: Start difference. First operand 2152 states and 2208 transitions. Second operand has 94 states, 94 states have (on average 5.180851063829787) internal successors, (487), 94 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:25:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:25:28,553 INFO L93 Difference]: Finished difference Result 2647 states and 2706 transitions. [2024-11-27 23:25:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2024-11-27 23:25:28,554 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 5.180851063829787) internal successors, (487), 94 states have internal predecessors, (487), 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 2052 [2024-11-27 23:25:28,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:25:28,562 INFO L225 Difference]: With dead ends: 2647 [2024-11-27 23:25:28,563 INFO L226 Difference]: Without dead ends: 2647 [2024-11-27 23:25:28,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4331 GetRequests, 4032 SyntacticMatches, 17 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21533 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=14098, Invalid=66274, Unknown=0, NotChecked=0, Total=80372 [2024-11-27 23:25:28,575 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 102 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 12144 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 12174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 12144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:25:28,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 144 Invalid, 12174 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 12144 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2024-11-27 23:25:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2024-11-27 23:25:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2368. [2024-11-27 23:25:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 1.0240811153358682) internal successors, (2424), 2367 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:25:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2424 transitions. [2024-11-27 23:25:28,610 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2424 transitions. Word has length 2052 [2024-11-27 23:25:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:25:28,611 INFO L471 AbstractCegarLoop]: Abstraction has 2368 states and 2424 transitions. [2024-11-27 23:25:28,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 5.180851063829787) internal successors, (487), 94 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:25:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2424 transitions. [2024-11-27 23:25:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2105 [2024-11-27 23:25:28,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:25:28,653 INFO L218 NwaCegarLoop]: trace histogram [471, 471, 470, 470, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:25:28,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-27 23:25:28,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:25:28,855 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:25:28,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:25:28,857 INFO L85 PathProgramCache]: Analyzing trace with hash 636088399, now seen corresponding path program 23 times [2024-11-27 23:25:28,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:25:28,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632519416] [2024-11-27 23:25:28,858 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:25:28,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:25:34,954 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2024-11-27 23:25:34,954 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:25:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 460188 backedges. 258311 proven. 6638 refuted. 0 times theorem prover too weak. 195239 trivial. 0 not checked. [2024-11-27 23:25:40,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:25:40,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632519416] [2024-11-27 23:25:40,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632519416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:25:40,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930995858] [2024-11-27 23:25:40,891 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:25:40,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:25:40,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:25:40,894 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:25:40,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-27 23:26:44,904 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2024-11-27 23:26:44,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:26:44,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 3972 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-27 23:26:44,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:26:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 460188 backedges. 276691 proven. 15508 refuted. 0 times theorem prover too weak. 167989 trivial. 0 not checked. [2024-11-27 23:26:47,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:26:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 460188 backedges. 279934 proven. 12265 refuted. 0 times theorem prover too weak. 167989 trivial. 0 not checked. [2024-11-27 23:26:50,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930995858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:26:50,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:26:50,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 82 [2024-11-27 23:26:50,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358914975] [2024-11-27 23:26:50,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:26:50,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-27 23:26:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:50,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-27 23:26:50,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1141, Invalid=5501, Unknown=0, NotChecked=0, Total=6642 [2024-11-27 23:26:50,359 INFO L87 Difference]: Start difference. First operand 2368 states and 2424 transitions. Second operand has 82 states, 82 states have (on average 5.121951219512195) internal successors, (420), 82 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:27:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:08,706 INFO L93 Difference]: Finished difference Result 2993 states and 3052 transitions. [2024-11-27 23:27:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-11-27 23:27:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 5.121951219512195) internal successors, (420), 82 states have internal predecessors, (420), 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 2104 [2024-11-27 23:27:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:08,716 INFO L225 Difference]: With dead ends: 2993 [2024-11-27 23:27:08,716 INFO L226 Difference]: Without dead ends: 2993 [2024-11-27 23:27:08,726 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4437 GetRequests, 4135 SyntacticMatches, 32 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22039 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=14013, Invalid=59699, Unknown=0, NotChecked=0, Total=73712 [2024-11-27 23:27:08,726 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 97 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 9059 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 9078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 9059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:08,727 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 136 Invalid, 9078 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19 Valid, 9059 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-27 23:27:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2024-11-27 23:27:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2602. [2024-11-27 23:27:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 1.0222991157247212) internal successors, (2659), 2601 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:27:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 2659 transitions. [2024-11-27 23:27:08,759 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 2659 transitions. Word has length 2104 [2024-11-27 23:27:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:08,760 INFO L471 AbstractCegarLoop]: Abstraction has 2602 states and 2659 transitions. [2024-11-27 23:27:08,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 5.121951219512195) internal successors, (420), 82 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:27:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 2659 transitions. [2024-11-27 23:27:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2153 [2024-11-27 23:27:08,806 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:08,807 INFO L218 NwaCegarLoop]: trace histogram [483, 483, 482, 482, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:27:08,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-27 23:27:09,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-27 23:27:09,008 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:27:09,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1246334799, now seen corresponding path program 24 times [2024-11-27 23:27:09,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:09,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114921684] [2024-11-27 23:27:09,009 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:27:09,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:16,448 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2024-11-27 23:27:16,449 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 483420 backedges. 45698 proven. 61363 refuted. 0 times theorem prover too weak. 376359 trivial. 0 not checked. [2024-11-27 23:27:23,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:23,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114921684] [2024-11-27 23:27:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114921684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:23,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275113218] [2024-11-27 23:27:23,857 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:27:23,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:23,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:23,859 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:23,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-27 23:28:36,279 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2024-11-27 23:28:36,279 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:36,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 4011 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-27 23:28:36,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:36,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:28:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 483420 backedges. 45575 proven. 61363 refuted. 0 times theorem prover too weak. 376482 trivial. 0 not checked. [2024-11-27 23:28:48,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 483420 backedges. 0 proven. 106938 refuted. 0 times theorem prover too weak. 376482 trivial. 0 not checked. [2024-11-27 23:29:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275113218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:03,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:03,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 104 [2024-11-27 23:29:03,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839860989] [2024-11-27 23:29:03,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:03,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-27 23:29:03,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:03,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-27 23:29:03,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2972, Invalid=7948, Unknown=0, NotChecked=0, Total=10920 [2024-11-27 23:29:03,917 INFO L87 Difference]: Start difference. First operand 2602 states and 2659 transitions. Second operand has 105 states, 104 states have (on average 3.8846153846153846) internal successors, (404), 105 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:29:25,640 INFO L93 Difference]: Finished difference Result 11370 states and 12305 transitions. [2024-11-27 23:29:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2024-11-27 23:29:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.8846153846153846) internal successors, (404), 105 states have internal predecessors, (404), 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 2152 [2024-11-27 23:29:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:29:25,661 INFO L225 Difference]: With dead ends: 11370 [2024-11-27 23:29:25,661 INFO L226 Difference]: Without dead ends: 11370 [2024-11-27 23:29:25,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4530 GetRequests, 4235 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28486 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=24057, Invalid=63855, Unknown=0, NotChecked=0, Total=87912 [2024-11-27 23:29:25,667 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 1183 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:29:25,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 25 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 23:29:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2024-11-27 23:29:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 2662. [2024-11-27 23:29:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 1.0274332957534762) internal successors, (2734), 2661 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 2734 transitions. [2024-11-27 23:29:25,725 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 2734 transitions. Word has length 2152 [2024-11-27 23:29:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:29:25,726 INFO L471 AbstractCegarLoop]: Abstraction has 2662 states and 2734 transitions. [2024-11-27 23:29:25,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.8846153846153846) internal successors, (404), 105 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:29:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 2734 transitions. [2024-11-27 23:29:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2213 [2024-11-27 23:29:25,766 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:29:25,767 INFO L218 NwaCegarLoop]: trace histogram [498, 498, 497, 497, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:29:25,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-27 23:29:25,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-27 23:29:25,970 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:29:25,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:29:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1935906121, now seen corresponding path program 25 times [2024-11-27 23:29:25,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:29:25,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804781347] [2024-11-27 23:29:25,972 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:29:25,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:29:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:29:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 513270 backedges. 239515 proven. 2320 refuted. 0 times theorem prover too weak. 271435 trivial. 0 not checked. [2024-11-27 23:29:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:29:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804781347] [2024-11-27 23:29:38,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804781347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:29:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769529115] [2024-11-27 23:29:38,864 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:29:38,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:38,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:29:38,866 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:29:38,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-27 23:29:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:29:40,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 7501 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-27 23:29:40,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:29:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 513270 backedges. 321560 proven. 15616 refuted. 0 times theorem prover too weak. 176094 trivial. 0 not checked. [2024-11-27 23:29:43,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 513270 backedges. 321560 proven. 15616 refuted. 0 times theorem prover too weak. 176094 trivial. 0 not checked. [2024-11-27 23:29:45,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769529115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:45,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:45,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 100 [2024-11-27 23:29:45,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220473522] [2024-11-27 23:29:45,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:46,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-27 23:29:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:46,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-27 23:29:46,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=8349, Unknown=0, NotChecked=0, Total=9900 [2024-11-27 23:29:46,004 INFO L87 Difference]: Start difference. First operand 2662 states and 2734 transitions. Second operand has 100 states, 100 states have (on average 5.33) internal successors, (533), 100 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:30:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:30:07,778 INFO L93 Difference]: Finished difference Result 4448 states and 4538 transitions. [2024-11-27 23:30:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2024-11-27 23:30:07,779 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 5.33) internal successors, (533), 100 states have internal predecessors, (533), 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 2212 [2024-11-27 23:30:07,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:30:07,784 INFO L225 Difference]: With dead ends: 4448 [2024-11-27 23:30:07,784 INFO L226 Difference]: Without dead ends: 4448 [2024-11-27 23:30:07,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4698 GetRequests, 4348 SyntacticMatches, 19 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30121 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=18611, Invalid=91945, Unknown=0, NotChecked=0, Total=110556 [2024-11-27 23:30:07,789 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 97 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 14811 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 14845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 14811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:30:07,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 174 Invalid, 14845 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 14811 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-27 23:30:07,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2024-11-27 23:30:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 3113. [2024-11-27 23:30:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 1.0237789203084833) internal successors, (3186), 3112 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:30:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 3186 transitions. [2024-11-27 23:30:07,816 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 3186 transitions. Word has length 2212 [2024-11-27 23:30:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:30:07,817 INFO L471 AbstractCegarLoop]: Abstraction has 3113 states and 3186 transitions. [2024-11-27 23:30:07,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 5.33) internal successors, (533), 100 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:30:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 3186 transitions. [2024-11-27 23:30:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2253 [2024-11-27 23:30:07,843 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:30:07,844 INFO L218 NwaCegarLoop]: trace histogram [508, 508, 507, 507, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:30:07,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-27 23:30:08,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:30:08,044 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:30:08,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -55779017, now seen corresponding path program 26 times [2024-11-27 23:30:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:30:08,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940270342] [2024-11-27 23:30:08,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:30:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:30:09,243 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:30:09,243 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:30:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 533670 backedges. 248432 proven. 2571 refuted. 0 times theorem prover too weak. 282667 trivial. 0 not checked. [2024-11-27 23:30:21,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:30:21,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940270342] [2024-11-27 23:30:21,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940270342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:30:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101516476] [2024-11-27 23:30:21,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:30:21,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:30:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:30:21,752 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:30:21,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-27 23:30:23,976 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:30:23,976 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:30:24,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 7631 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-27 23:30:24,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:30:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 533670 backedges. 351667 proven. 18108 refuted. 0 times theorem prover too weak. 163895 trivial. 0 not checked. [2024-11-27 23:30:26,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:30:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 533670 backedges. 351667 proven. 18108 refuted. 0 times theorem prover too weak. 163895 trivial. 0 not checked. [2024-11-27 23:30:28,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101516476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:30:28,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:30:28,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 86 [2024-11-27 23:30:28,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140939401] [2024-11-27 23:30:28,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:30:28,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-27 23:30:28,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:30:28,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-27 23:30:28,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=6068, Unknown=0, NotChecked=0, Total=7310 [2024-11-27 23:30:28,769 INFO L87 Difference]: Start difference. First operand 3113 states and 3186 transitions. Second operand has 86 states, 86 states have (on average 5.662790697674419) internal successors, (487), 86 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:30:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:30:48,952 INFO L93 Difference]: Finished difference Result 4153 states and 4234 transitions. [2024-11-27 23:30:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2024-11-27 23:30:48,953 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 5.662790697674419) internal successors, (487), 86 states have internal predecessors, (487), 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 2252 [2024-11-27 23:30:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:30:48,961 INFO L225 Difference]: With dead ends: 4153 [2024-11-27 23:30:48,961 INFO L226 Difference]: Without dead ends: 4153 [2024-11-27 23:30:48,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4800 GetRequests, 4425 SyntacticMatches, 39 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35402 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=19353, Invalid=94553, Unknown=0, NotChecked=0, Total=113906 [2024-11-27 23:30:48,969 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 126 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 13344 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 13371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 13344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:30:48,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 168 Invalid, 13371 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 13344 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-27 23:30:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2024-11-27 23:30:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3598. [2024-11-27 23:30:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 1.0211287183764248) internal successors, (3673), 3597 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:30:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 3673 transitions. [2024-11-27 23:30:49,009 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 3673 transitions. Word has length 2252 [2024-11-27 23:30:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:30:49,011 INFO L471 AbstractCegarLoop]: Abstraction has 3598 states and 3673 transitions. [2024-11-27 23:30:49,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 5.662790697674419) internal successors, (487), 86 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:30:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 3673 transitions. [2024-11-27 23:30:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2289 [2024-11-27 23:30:49,053 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:30:49,053 INFO L218 NwaCegarLoop]: trace histogram [517, 517, 516, 516, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-27 23:30:49,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-27 23:30:49,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-27 23:30:49,254 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-27 23:30:49,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1570662703, now seen corresponding path program 27 times [2024-11-27 23:30:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:30:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253729704] [2024-11-27 23:30:49,255 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:30:49,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:30:50,641 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-27 23:30:50,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:30:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 552372 backedges. 63 proven. 172715 refuted. 0 times theorem prover too weak. 379594 trivial. 0 not checked. [2024-11-27 23:30:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:30:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253729704] [2024-11-27 23:30:55,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253729704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:30:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697742011] [2024-11-27 23:30:55,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:30:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:30:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:30:55,074 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:30:55,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2cff2a-5df4-4721-a5f5-700ce13a1e3d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-27 23:31:07,640 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-27 23:31:07,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:07,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-27 23:31:07,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:07,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:31:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 552372 backedges. 103334 proven. 69444 refuted. 0 times theorem prover too weak. 379594 trivial. 0 not checked. [2024-11-27 23:31:21,836 INFO L312 TraceCheckSpWp]: Computing backward predicates...