./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 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC --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-6497de0 [2024-11-23 23:11:19,132 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:11:19,194 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:11:19,200 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:11:19,200 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:11:19,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:11:19,225 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:11:19,225 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:11:19,226 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:11:19,226 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:11:19,226 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:11:19,226 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:11:19,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:11:19,226 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:11:19,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:11:19,227 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:11:19,228 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:11:19,228 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:11:19,228 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:11:19,228 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:11:19,228 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:11:19,228 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:11:19,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:11:19,228 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:11:19,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:11:19,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:11:19,229 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:11:19,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:11:19,230 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:11:19,230 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:11:19,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:11:19,230 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:11:19,230 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:11:19,230 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:11:19,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:11:19,231 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:11:19,231 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:11:19,231 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:11:19,231 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:11:19,231 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_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC 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 [2024-11-23 23:11:19,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:11:19,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:11:19,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:11:19,528 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:11:19,528 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:11:19,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2024-11-23 23:11:22,605 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/data/0e9e5c0c1/5326bc56aaa94da6825abe476bfa854c/FLAG3c0815664 [2024-11-23 23:11:22,943 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:11:22,944 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2024-11-23 23:11:22,958 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/data/0e9e5c0c1/5326bc56aaa94da6825abe476bfa854c/FLAG3c0815664 [2024-11-23 23:11:22,982 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/data/0e9e5c0c1/5326bc56aaa94da6825abe476bfa854c [2024-11-23 23:11:22,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:11:22,988 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:11:22,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:11:22,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:11:22,995 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:11:22,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:11:22" (1/1) ... [2024-11-23 23:11:22,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c2607e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:22, skipping insertion in model container [2024-11-23 23:11:23,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:11:22" (1/1) ... [2024-11-23 23:11:23,013 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:11:23,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:11:23,191 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:11:23,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:11:23,224 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:11:23,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23 WrapperNode [2024-11-23 23:11:23,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:11:23,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:11:23,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:11:23,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:11:23,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,267 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-11-23 23:11:23,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:11:23,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:11:23,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:11:23,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:11:23,279 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,302 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 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 [1, 0]. [2024-11-23 23:11:23,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,303 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,311 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,315 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,320 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,321 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:11:23,329 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:11:23,329 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:11:23,329 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:11:23,330 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (1/1) ... [2024-11-23 23:11:23,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:11:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:23,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:11:23,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:11:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:11:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:11:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:11:23,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:11:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:11:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:11:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 23:11:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 23:11:23,485 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:11:23,487 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:11:23,718 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-23 23:11:23,718 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:11:23,732 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:11:23,732 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 23:11:23,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:11:23 BoogieIcfgContainer [2024-11-23 23:11:23,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:11:23,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:11:23,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:11:23,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:11:23,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:11:22" (1/3) ... [2024-11-23 23:11:23,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c64014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:11:23, skipping insertion in model container [2024-11-23 23:11:23,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:11:23" (2/3) ... [2024-11-23 23:11:23,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c64014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:11:23, skipping insertion in model container [2024-11-23 23:11:23,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:11:23" (3/3) ... [2024-11-23 23:11:23,747 INFO L128 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2024-11-23 23:11:23,765 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:11:23,767 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. [2024-11-23 23:11:23,809 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:11:23,821 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;@64b02866, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:11:23,821 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-23 23:11:23,825 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) [2024-11-23 23:11:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-23 23:11:23,831 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:23,831 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 23:11:23,832 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)] === [2024-11-23 23:11:23,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash 890553482, now seen corresponding path program 1 times [2024-11-23 23:11:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:23,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266073469] [2024-11-23 23:11:23,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:23,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:23,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:23,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266073469] [2024-11-23 23:11:23,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266073469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:23,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:23,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:11:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799651769] [2024-11-23 23:11:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:23,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 23:11:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:23,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 23:11:23,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 23:11:23,994 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) [2024-11-23 23:11:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:24,004 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2024-11-23 23:11:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 23:11:24,006 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 [2024-11-23 23:11:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:24,010 INFO L225 Difference]: With dead ends: 29 [2024-11-23 23:11:24,010 INFO L226 Difference]: Without dead ends: 27 [2024-11-23 23:11:24,012 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 [2024-11-23 23:11:24,015 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 [2024-11-23 23:11:24,016 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] [2024-11-23 23:11:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-23 23:11:24,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-23 23:11:24,041 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) [2024-11-23 23:11:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-23 23:11:24,046 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2024-11-23 23:11:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:24,046 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-23 23:11:24,046 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) [2024-11-23 23:11:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-23 23:11:24,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-23 23:11:24,047 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:24,047 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 23:11:24,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:11:24,047 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)] === [2024-11-23 23:11:24,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 889601163, now seen corresponding path program 1 times [2024-11-23 23:11:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:24,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755570840] [2024-11-23 23:11:24,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:24,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755570840] [2024-11-23 23:11:24,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755570840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:24,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:24,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:11:24,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422728021] [2024-11-23 23:11:24,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:24,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:11:24,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:24,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:11:24,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:11:24,238 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) [2024-11-23 23:11:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:24,287 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-23 23:11:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:11:24,288 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 [2024-11-23 23:11:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:24,288 INFO L225 Difference]: With dead ends: 33 [2024-11-23 23:11:24,288 INFO L226 Difference]: Without dead ends: 33 [2024-11-23 23:11:24,289 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 [2024-11-23 23:11:24,290 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, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:24,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:11:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-23 23:11:24,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-11-23 23:11:24,293 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) [2024-11-23 23:11:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-23 23:11:24,294 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2024-11-23 23:11:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:24,294 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-23 23:11:24,294 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) [2024-11-23 23:11:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-23 23:11:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-23 23:11:24,295 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:24,295 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 23:11:24,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:11:24,296 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)] === [2024-11-23 23:11:24,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 889689543, now seen corresponding path program 1 times [2024-11-23 23:11:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:24,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511269884] [2024-11-23 23:11:24,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:24,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:24,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511269884] [2024-11-23 23:11:24,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511269884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:24,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:24,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:11:24,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392571358] [2024-11-23 23:11:24,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:24,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:11:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:24,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:11:24,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:11:24,377 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) [2024-11-23 23:11:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:24,454 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-23 23:11:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:11:24,457 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 [2024-11-23 23:11:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:24,458 INFO L225 Difference]: With dead ends: 49 [2024-11-23 23:11:24,458 INFO L226 Difference]: Without dead ends: 49 [2024-11-23 23:11:24,458 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 [2024-11-23 23:11:24,459 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:24,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:11:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-23 23:11:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2024-11-23 23:11:24,468 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) [2024-11-23 23:11:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-23 23:11:24,469 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 6 [2024-11-23 23:11:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:24,470 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-23 23:11:24,470 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) [2024-11-23 23:11:24,470 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-23 23:11:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 23:11:24,472 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:24,472 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:24,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:11:24,473 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)] === [2024-11-23 23:11:24,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1807832333, now seen corresponding path program 1 times [2024-11-23 23:11:24,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:24,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204878402] [2024-11-23 23:11:24,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:24,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:24,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:24,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204878402] [2024-11-23 23:11:24,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204878402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:24,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:24,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:11:24,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970512636] [2024-11-23 23:11:24,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:24,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:11:24,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:24,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:11:24,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:11:24,645 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) [2024-11-23 23:11:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:24,715 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-23 23:11:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:11:24,716 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 [2024-11-23 23:11:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:24,717 INFO L225 Difference]: With dead ends: 30 [2024-11-23 23:11:24,718 INFO L226 Difference]: Without dead ends: 30 [2024-11-23 23:11:24,718 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 [2024-11-23 23:11:24,719 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 [2024-11-23 23:11:24,722 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] [2024-11-23 23:11:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-23 23:11:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-23 23:11:24,727 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) [2024-11-23 23:11:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-23 23:11:24,728 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 7 [2024-11-23 23:11:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:24,728 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-23 23:11:24,729 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) [2024-11-23 23:11:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-23 23:11:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 23:11:24,729 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:24,729 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:24,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 23:11:24,730 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)] === [2024-11-23 23:11:24,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1807832334, now seen corresponding path program 1 times [2024-11-23 23:11:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:24,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667074045] [2024-11-23 23:11:24,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667074045] [2024-11-23 23:11:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667074045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:25,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:25,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:11:25,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414246843] [2024-11-23 23:11:25,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:25,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:11:25,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:25,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:11:25,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:11:25,031 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) [2024-11-23 23:11:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:25,158 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-23 23:11:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:11:25,159 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 [2024-11-23 23:11:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:25,160 INFO L225 Difference]: With dead ends: 33 [2024-11-23 23:11:25,160 INFO L226 Difference]: Without dead ends: 33 [2024-11-23 23:11:25,160 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:11:25,161 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 [2024-11-23 23:11:25,161 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] [2024-11-23 23:11:25,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-23 23:11:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-23 23:11:25,163 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) [2024-11-23 23:11:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-23 23:11:25,164 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2024-11-23 23:11:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:25,164 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-23 23:11:25,164 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) [2024-11-23 23:11:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-23 23:11:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-23 23:11:25,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:25,165 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:25,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 23:11:25,165 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)] === [2024-11-23 23:11:25,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash 208295028, now seen corresponding path program 1 times [2024-11-23 23:11:25,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:25,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561242836] [2024-11-23 23:11:25,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:25,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:25,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:25,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561242836] [2024-11-23 23:11:25,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561242836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:25,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:25,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:11:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161594667] [2024-11-23 23:11:25,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:25,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:11:25,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:25,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:11:25,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:11:25,301 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) [2024-11-23 23:11:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:25,392 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-11-23 23:11:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:11:25,393 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 [2024-11-23 23:11:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:25,393 INFO L225 Difference]: With dead ends: 50 [2024-11-23 23:11:25,393 INFO L226 Difference]: Without dead ends: 50 [2024-11-23 23:11:25,394 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 [2024-11-23 23:11:25,394 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 [2024-11-23 23:11:25,395 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] [2024-11-23 23:11:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-23 23:11:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2024-11-23 23:11:25,398 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) [2024-11-23 23:11:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-23 23:11:25,398 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2024-11-23 23:11:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:25,398 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-23 23:11:25,399 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) [2024-11-23 23:11:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-23 23:11:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-23 23:11:25,399 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:25,399 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:25,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:11:25,399 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)] === [2024-11-23 23:11:25,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1756862701, now seen corresponding path program 1 times [2024-11-23 23:11:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:25,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719620016] [2024-11-23 23:11:25,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:25,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719620016] [2024-11-23 23:11:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719620016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:25,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15046882] [2024-11-23 23:11:25,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:25,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:25,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:25,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:11:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:25,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:11:25,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:25,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15046882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:25,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:25,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-23 23:11:25,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992027484] [2024-11-23 23:11:25,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:25,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:11:25,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:25,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:11:25,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:11:25,667 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) [2024-11-23 23:11:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:25,769 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-11-23 23:11:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:11:25,769 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 [2024-11-23 23:11:25,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:25,771 INFO L225 Difference]: With dead ends: 48 [2024-11-23 23:11:25,771 INFO L226 Difference]: Without dead ends: 48 [2024-11-23 23:11:25,771 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 [2024-11-23 23:11:25,772 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 [2024-11-23 23:11:25,772 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] [2024-11-23 23:11:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-23 23:11:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-11-23 23:11:25,782 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) [2024-11-23 23:11:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-23 23:11:25,783 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 10 [2024-11-23 23:11:25,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:25,783 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-23 23:11:25,784 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) [2024-11-23 23:11:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-23 23:11:25,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-23 23:11:25,784 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:25,784 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:25,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:25,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:25,989 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)] === [2024-11-23 23:11:25,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1371831174, now seen corresponding path program 1 times [2024-11-23 23:11:25,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:25,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073125235] [2024-11-23 23:11:25,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:25,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:26,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:26,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073125235] [2024-11-23 23:11:26,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073125235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:26,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332861121] [2024-11-23 23:11:26,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:26,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:26,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:26,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:11:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:26,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 23:11:26,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:26,353 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 [2024-11-23 23:11:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:26,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:26,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332861121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:26,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:26,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-23 23:11:26,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392445554] [2024-11-23 23:11:26,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:26,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:11:26,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:26,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:11:26,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:11:26,641 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) [2024-11-23 23:11:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:26,829 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-11-23 23:11:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:11:26,829 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 [2024-11-23 23:11:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:26,830 INFO L225 Difference]: With dead ends: 49 [2024-11-23 23:11:26,830 INFO L226 Difference]: Without dead ends: 49 [2024-11-23 23:11:26,830 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 [2024-11-23 23:11:26,831 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 [2024-11-23 23:11:26,831 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] [2024-11-23 23:11:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-23 23:11:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-11-23 23:11:26,834 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) [2024-11-23 23:11:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-23 23:11:26,835 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 11 [2024-11-23 23:11:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:26,835 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-23 23:11:26,835 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) [2024-11-23 23:11:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-23 23:11:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-23 23:11:26,836 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:26,836 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:26,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 23:11:27,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-23 23:11:27,040 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)] === [2024-11-23 23:11:27,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash -422839044, now seen corresponding path program 1 times [2024-11-23 23:11:27,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:27,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284808343] [2024-11-23 23:11:27,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:27,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:27,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:27,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284808343] [2024-11-23 23:11:27,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284808343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:27,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466776446] [2024-11-23 23:11:27,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:27,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:27,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:27,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:27,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:11:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:27,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:11:27,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:27,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466776446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:27,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:27,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-23 23:11:27,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943211110] [2024-11-23 23:11:27,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:27,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 23:11:27,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:27,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 23:11:27,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:11:27,280 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) [2024-11-23 23:11:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:27,459 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2024-11-23 23:11:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:11:27,459 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 [2024-11-23 23:11:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:27,460 INFO L225 Difference]: With dead ends: 73 [2024-11-23 23:11:27,460 INFO L226 Difference]: Without dead ends: 73 [2024-11-23 23:11:27,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:11:27,460 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 [2024-11-23 23:11:27,461 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] [2024-11-23 23:11:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-23 23:11:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2024-11-23 23:11:27,463 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) [2024-11-23 23:11:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-11-23 23:11:27,464 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 12 [2024-11-23 23:11:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:27,464 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-11-23 23:11:27,464 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) [2024-11-23 23:11:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-11-23 23:11:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-23 23:11:27,470 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:27,470 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:27,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:27,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-23 23:11:27,671 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)] === [2024-11-23 23:11:27,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash -275373692, now seen corresponding path program 2 times [2024-11-23 23:11:27,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:27,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537522782] [2024-11-23 23:11:27,671 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:27,688 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:11:27,688 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:27,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:27,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537522782] [2024-11-23 23:11:27,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537522782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:27,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:27,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:11:27,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351212845] [2024-11-23 23:11:27,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:27,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:11:27,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:27,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:11:27,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:11:27,746 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) [2024-11-23 23:11:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:27,771 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2024-11-23 23:11:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:11:27,772 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 [2024-11-23 23:11:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:27,772 INFO L225 Difference]: With dead ends: 41 [2024-11-23 23:11:27,772 INFO L226 Difference]: Without dead ends: 41 [2024-11-23 23:11:27,772 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 [2024-11-23 23:11:27,773 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 [2024-11-23 23:11:27,773 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] [2024-11-23 23:11:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-23 23:11:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-23 23:11:27,778 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) [2024-11-23 23:11:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-23 23:11:27,779 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 16 [2024-11-23 23:11:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:27,780 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-23 23:11:27,780 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) [2024-11-23 23:11:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-23 23:11:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-23 23:11:27,780 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:27,780 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:27,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:11:27,781 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)] === [2024-11-23 23:11:27,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash -275373691, now seen corresponding path program 1 times [2024-11-23 23:11:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362122471] [2024-11-23 23:11:27,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:27,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:27,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362122471] [2024-11-23 23:11:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362122471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:27,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:27,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:11:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87787171] [2024-11-23 23:11:27,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:27,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:11:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:27,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:11:27,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:11:27,986 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) [2024-11-23 23:11:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:28,049 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2024-11-23 23:11:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:11:28,049 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 [2024-11-23 23:11:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:28,050 INFO L225 Difference]: With dead ends: 67 [2024-11-23 23:11:28,050 INFO L226 Difference]: Without dead ends: 67 [2024-11-23 23:11:28,050 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 [2024-11-23 23:11:28,050 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:28,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:11:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-23 23:11:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2024-11-23 23:11:28,057 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) [2024-11-23 23:11:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-11-23 23:11:28,057 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 16 [2024-11-23 23:11:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:28,061 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-11-23 23:11:28,061 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) [2024-11-23 23:11:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-11-23 23:11:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-23 23:11:28,061 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:28,061 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:28,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 23:11:28,062 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)] === [2024-11-23 23:11:28,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1884296825, now seen corresponding path program 1 times [2024-11-23 23:11:28,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:28,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773718830] [2024-11-23 23:11:28,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:28,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:28,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773718830] [2024-11-23 23:11:28,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773718830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221091157] [2024-11-23 23:11:28,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:28,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:28,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:28,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:28,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:11:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:28,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:11:28,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:28,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:28,465 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 [2024-11-23 23:11:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:28,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221091157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:28,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:28,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-23 23:11:28,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307552621] [2024-11-23 23:11:28,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:28,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 23:11:28,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:28,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 23:11:28,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:11:28,530 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) [2024-11-23 23:11:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:28,642 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2024-11-23 23:11:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:11:28,642 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 [2024-11-23 23:11:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:28,643 INFO L225 Difference]: With dead ends: 69 [2024-11-23 23:11:28,643 INFO L226 Difference]: Without dead ends: 69 [2024-11-23 23:11:28,643 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 [2024-11-23 23:11:28,644 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 [2024-11-23 23:11:28,644 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] [2024-11-23 23:11:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-23 23:11:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2024-11-23 23:11:28,647 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) [2024-11-23 23:11:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-11-23 23:11:28,648 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 21 [2024-11-23 23:11:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:28,648 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-11-23 23:11:28,648 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) [2024-11-23 23:11:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-11-23 23:11:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-23 23:11:28,649 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:28,649 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-23 23:11:28,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:28,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-23 23:11:28,850 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)] === [2024-11-23 23:11:28,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:28,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1566323029, now seen corresponding path program 2 times [2024-11-23 23:11:28,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:28,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737926704] [2024-11-23 23:11:28,851 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:28,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:28,883 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:28,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:29,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:29,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737926704] [2024-11-23 23:11:29,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737926704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:29,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735929987] [2024-11-23 23:11:29,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:29,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:29,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:29,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:29,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:11:29,111 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:29,111 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:29,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:11:29,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:29,213 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:11:29,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735929987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:29,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:11:29,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-11-23 23:11:29,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397109569] [2024-11-23 23:11:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:29,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:11:29,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:29,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:11:29,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:11:29,216 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) [2024-11-23 23:11:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:29,312 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2024-11-23 23:11:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:11:29,313 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 [2024-11-23 23:11:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:29,313 INFO L225 Difference]: With dead ends: 57 [2024-11-23 23:11:29,313 INFO L226 Difference]: Without dead ends: 57 [2024-11-23 23:11:29,314 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 [2024-11-23 23:11:29,315 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 [2024-11-23 23:11:29,316 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] [2024-11-23 23:11:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-23 23:11:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-23 23:11:29,322 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) [2024-11-23 23:11:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-11-23 23:11:29,322 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 22 [2024-11-23 23:11:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:29,322 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-11-23 23:11:29,322 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) [2024-11-23 23:11:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-11-23 23:11:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-23 23:11:29,323 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:29,323 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] [2024-11-23 23:11:29,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:29,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-23 23:11:29,524 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)] === [2024-11-23 23:11:29,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash 135841243, now seen corresponding path program 1 times [2024-11-23 23:11:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:29,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523194250] [2024-11-23 23:11:29,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:29,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:29,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523194250] [2024-11-23 23:11:29,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523194250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:29,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19309586] [2024-11-23 23:11:29,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:29,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:29,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:29,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:29,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:11:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:29,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:11:29,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:29,956 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 [2024-11-23 23:11:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:11:29,956 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:11:29,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19309586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:29,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:11:29,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-23 23:11:29,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121894717] [2024-11-23 23:11:29,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:29,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:11:29,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:29,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:11:29,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-23 23:11:29,958 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) [2024-11-23 23:11:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:29,981 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2024-11-23 23:11:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:11:29,981 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 [2024-11-23 23:11:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:29,982 INFO L225 Difference]: With dead ends: 56 [2024-11-23 23:11:29,982 INFO L226 Difference]: Without dead ends: 54 [2024-11-23 23:11:29,982 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 [2024-11-23 23:11:29,983 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 [2024-11-23 23:11:29,983 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] [2024-11-23 23:11:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-23 23:11:29,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-23 23:11:29,985 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) [2024-11-23 23:11:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-11-23 23:11:29,986 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 24 [2024-11-23 23:11:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:29,986 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-11-23 23:11:29,986 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) [2024-11-23 23:11:29,986 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-11-23 23:11:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-23 23:11:29,987 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:29,987 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:29,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:30,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:11:30,191 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)] === [2024-11-23 23:11:30,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:30,191 INFO L85 PathProgramCache]: Analyzing trace with hash 135844733, now seen corresponding path program 1 times [2024-11-23 23:11:30,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:30,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283882885] [2024-11-23 23:11:30,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:30,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 23:11:30,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283882885] [2024-11-23 23:11:30,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283882885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083529363] [2024-11-23 23:11:30,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:30,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:30,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:30,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:30,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:11:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:30,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 23:11:30,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:30,541 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 [2024-11-23 23:11:30,608 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 [2024-11-23 23:11:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:30,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:30,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-23 23:11:30,689 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 [2024-11-23 23:11:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:11:30,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083529363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:30,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:30,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2024-11-23 23:11:30,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931810216] [2024-11-23 23:11:30,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:30,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:11:30,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:30,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:11:30,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:11:30,855 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) [2024-11-23 23:11:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:31,135 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-11-23 23:11:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:11:31,136 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 [2024-11-23 23:11:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:31,136 INFO L225 Difference]: With dead ends: 86 [2024-11-23 23:11:31,136 INFO L226 Difference]: Without dead ends: 86 [2024-11-23 23:11:31,137 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 [2024-11-23 23:11:31,137 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 [2024-11-23 23:11:31,138 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] [2024-11-23 23:11:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-23 23:11:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2024-11-23 23:11:31,140 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) [2024-11-23 23:11:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-11-23 23:11:31,145 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 24 [2024-11-23 23:11:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:31,145 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-11-23 23:11:31,145 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) [2024-11-23 23:11:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-11-23 23:11:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-23 23:11:31,146 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:31,146 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-23 23:11:31,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:11:31,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-23 23:11:31,347 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)] === [2024-11-23 23:11:31,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1423184516, now seen corresponding path program 1 times [2024-11-23 23:11:31,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:31,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319727854] [2024-11-23 23:11:31,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:31,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:31,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319727854] [2024-11-23 23:11:31,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319727854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:31,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674835270] [2024-11-23 23:11:31,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:31,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:31,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:11:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:31,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:11:31,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:31,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:31,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674835270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:31,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:31,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-23 23:11:31,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407006108] [2024-11-23 23:11:31,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:31,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:11:31,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:31,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:11:31,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:11:31,858 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) [2024-11-23 23:11:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:32,119 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-11-23 23:11:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:11:32,120 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 [2024-11-23 23:11:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:32,121 INFO L225 Difference]: With dead ends: 58 [2024-11-23 23:11:32,121 INFO L226 Difference]: Without dead ends: 58 [2024-11-23 23:11:32,121 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 [2024-11-23 23:11:32,122 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 [2024-11-23 23:11:32,122 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] [2024-11-23 23:11:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-23 23:11:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-23 23:11:32,125 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) [2024-11-23 23:11:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-11-23 23:11:32,126 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 31 [2024-11-23 23:11:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:32,126 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-11-23 23:11:32,126 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) [2024-11-23 23:11:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-11-23 23:11:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-23 23:11:32,127 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:32,127 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-23 23:11:32,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:32,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 23:11:32,328 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)] === [2024-11-23 23:11:32,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:32,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1224350604, now seen corresponding path program 2 times [2024-11-23 23:11:32,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:32,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263910140] [2024-11-23 23:11:32,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:32,356 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:32,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:11:32,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263910140] [2024-11-23 23:11:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263910140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857618887] [2024-11-23 23:11:32,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:32,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:32,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:32,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:11:32,670 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:32,670 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:32,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:11:32,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:32,696 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 [2024-11-23 23:11:32,707 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 [2024-11-23 23:11:32,717 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 [2024-11-23 23:11:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:11:33,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:11:33,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857618887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:33,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:33,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 8 [2024-11-23 23:11:33,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140218795] [2024-11-23 23:11:33,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:33,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 23:11:33,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:33,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 23:11:33,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:11:33,309 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 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) [2024-11-23 23:11:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:33,407 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2024-11-23 23:11:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:11:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 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 [2024-11-23 23:11:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:33,408 INFO L225 Difference]: With dead ends: 137 [2024-11-23 23:11:33,408 INFO L226 Difference]: Without dead ends: 137 [2024-11-23 23:11:33,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:11:33,409 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 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 [2024-11-23 23:11:33,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:11:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-23 23:11:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2024-11-23 23:11:33,415 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) [2024-11-23 23:11:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2024-11-23 23:11:33,416 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 35 [2024-11-23 23:11:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:33,416 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2024-11-23 23:11:33,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 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) [2024-11-23 23:11:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2024-11-23 23:11:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-23 23:11:33,423 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:33,423 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:33,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:33,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:11:33,624 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)] === [2024-11-23 23:11:33,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash -285031318, now seen corresponding path program 1 times [2024-11-23 23:11:33,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:33,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930334433] [2024-11-23 23:11:33,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:33,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:11:33,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930334433] [2024-11-23 23:11:33,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930334433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536178278] [2024-11-23 23:11:33,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:33,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:33,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:33,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:11:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:33,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:11:33,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:11:34,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:11:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536178278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:34,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:34,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-11-23 23:11:34,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466615302] [2024-11-23 23:11:34,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:34,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 23:11:34,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:34,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 23:11:34,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:11:34,158 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) [2024-11-23 23:11:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:34,423 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2024-11-23 23:11:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:11:34,424 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 [2024-11-23 23:11:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:34,425 INFO L225 Difference]: With dead ends: 127 [2024-11-23 23:11:34,425 INFO L226 Difference]: Without dead ends: 127 [2024-11-23 23:11:34,425 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 [2024-11-23 23:11:34,426 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:34,426 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 98 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:11:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-23 23:11:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-11-23 23:11:34,434 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) [2024-11-23 23:11:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2024-11-23 23:11:34,435 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 37 [2024-11-23 23:11:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:34,437 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2024-11-23 23:11:34,437 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) [2024-11-23 23:11:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2024-11-23 23:11:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-23 23:11:34,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:34,438 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:11:34,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:11:34,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 23:11:34,639 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)] === [2024-11-23 23:11:34,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 818009732, now seen corresponding path program 2 times [2024-11-23 23:11:34,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:34,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942967585] [2024-11-23 23:11:34,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:34,667 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:34,671 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:11:34,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942967585] [2024-11-23 23:11:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942967585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813484757] [2024-11-23 23:11:34,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:34,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:34,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:34,773 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:34,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:11:34,865 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:34,865 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:34,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:11:34,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:11:35,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:35,196 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 [2024-11-23 23:11:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:11:35,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813484757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:35,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:35,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-23 23:11:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30378913] [2024-11-23 23:11:35,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:35,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 23:11:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:35,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 23:11:35,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:11:35,367 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) [2024-11-23 23:11:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:35,574 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2024-11-23 23:11:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:11:35,575 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 [2024-11-23 23:11:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:35,576 INFO L225 Difference]: With dead ends: 132 [2024-11-23 23:11:35,576 INFO L226 Difference]: Without dead ends: 132 [2024-11-23 23:11:35,577 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 [2024-11-23 23:11:35,577 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:35,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 87 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:11:35,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-23 23:11:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2024-11-23 23:11:35,584 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) [2024-11-23 23:11:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2024-11-23 23:11:35,585 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 43 [2024-11-23 23:11:35,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:35,585 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2024-11-23 23:11:35,585 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) [2024-11-23 23:11:35,585 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2024-11-23 23:11:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-23 23:11:35,586 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:35,586 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1] [2024-11-23 23:11:35,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 23:11:35,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:35,790 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)] === [2024-11-23 23:11:35,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1486412605, now seen corresponding path program 2 times [2024-11-23 23:11:35,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:35,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696374545] [2024-11-23 23:11:35,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:35,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:35,815 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:35,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:11:36,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:36,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696374545] [2024-11-23 23:11:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696374545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:36,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435077501] [2024-11-23 23:11:36,024 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:36,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:36,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:36,027 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:36,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:11:36,129 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:36,129 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:36,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:11:36,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 37 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:11:36,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 37 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:11:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435077501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:36,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:36,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-11-23 23:11:36,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267689306] [2024-11-23 23:11:36,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:36,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-23 23:11:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:36,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-23 23:11:36,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:11:36,466 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) [2024-11-23 23:11:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:36,805 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2024-11-23 23:11:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-23 23:11:36,805 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 [2024-11-23 23:11:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:36,806 INFO L225 Difference]: With dead ends: 128 [2024-11-23 23:11:36,806 INFO L226 Difference]: Without dead ends: 128 [2024-11-23 23:11:36,807 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 [2024-11-23 23:11:36,807 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:36,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 80 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:11:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-23 23:11:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2024-11-23 23:11:36,811 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) [2024-11-23 23:11:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2024-11-23 23:11:36,812 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 56 [2024-11-23 23:11:36,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:36,812 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2024-11-23 23:11:36,812 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) [2024-11-23 23:11:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2024-11-23 23:11:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-23 23:11:36,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:36,813 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2024-11-23 23:11:36,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:37,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:37,017 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)] === [2024-11-23 23:11:37,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:37,018 INFO L85 PathProgramCache]: Analyzing trace with hash -583901913, now seen corresponding path program 3 times [2024-11-23 23:11:37,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:37,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054754986] [2024-11-23 23:11:37,018 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:11:37,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:37,039 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:11:37,040 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-23 23:11:37,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:37,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054754986] [2024-11-23 23:11:37,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054754986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:37,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413204842] [2024-11-23 23:11:37,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:11:37,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:37,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:37,189 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:37,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 23:11:37,272 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:11:37,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:37,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 23:11:37,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:11:37,295 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 [2024-11-23 23:11:37,298 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 [2024-11-23 23:11:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-23 23:11:37,628 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:11:37,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413204842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:37,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:11:37,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:11:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244567223] [2024-11-23 23:11:37,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:37,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:11:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:37,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:11:37,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:11:37,630 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) [2024-11-23 23:11:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:37,686 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2024-11-23 23:11:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:11:37,687 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 [2024-11-23 23:11:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:37,687 INFO L225 Difference]: With dead ends: 124 [2024-11-23 23:11:37,687 INFO L226 Difference]: Without dead ends: 124 [2024-11-23 23:11:37,688 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 [2024-11-23 23:11:37,688 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:37,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 33 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:11:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-23 23:11:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2024-11-23 23:11:37,691 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) [2024-11-23 23:11:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2024-11-23 23:11:37,692 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 65 [2024-11-23 23:11:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:37,692 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2024-11-23 23:11:37,692 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) [2024-11-23 23:11:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2024-11-23 23:11:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-23 23:11:37,693 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:37,693 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] [2024-11-23 23:11:37,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:37,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-23 23:11:37,894 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)] === [2024-11-23 23:11:37,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash 350308572, now seen corresponding path program 1 times [2024-11-23 23:11:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669598897] [2024-11-23 23:11:37,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:37,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 13 proven. 126 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:11:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669598897] [2024-11-23 23:11:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669598897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661238241] [2024-11-23 23:11:38,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:38,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:38,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:38,129 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:38,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 23:11:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:38,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:11:38,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 51 proven. 88 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:11:38,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 51 proven. 88 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:11:38,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661238241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:38,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:38,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-23 23:11:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155380440] [2024-11-23 23:11:38,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:38,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 23:11:38,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:38,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 23:11:38,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:11:38,510 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) [2024-11-23 23:11:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:38,822 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2024-11-23 23:11:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:11:38,822 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 [2024-11-23 23:11:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:38,823 INFO L225 Difference]: With dead ends: 97 [2024-11-23 23:11:38,823 INFO L226 Difference]: Without dead ends: 97 [2024-11-23 23:11:38,824 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 [2024-11-23 23:11:38,825 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:38,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 57 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:11:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-23 23:11:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2024-11-23 23:11:38,828 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) [2024-11-23 23:11:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2024-11-23 23:11:38,828 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 69 [2024-11-23 23:11:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:38,828 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2024-11-23 23:11:38,829 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) [2024-11-23 23:11:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2024-11-23 23:11:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-23 23:11:38,829 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:38,829 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] [2024-11-23 23:11:38,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 23:11:39,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:39,034 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)] === [2024-11-23 23:11:39,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1281349460, now seen corresponding path program 2 times [2024-11-23 23:11:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:39,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22139733] [2024-11-23 23:11:39,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:39,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:39,052 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:11:39,052 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-11-23 23:11:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22139733] [2024-11-23 23:11:39,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22139733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:11:39,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:11:39,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:11:39,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329091715] [2024-11-23 23:11:39,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:11:39,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:11:39,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:39,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:11:39,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:11:39,114 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) [2024-11-23 23:11:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:39,130 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2024-11-23 23:11:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:11:39,130 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 [2024-11-23 23:11:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:39,131 INFO L225 Difference]: With dead ends: 95 [2024-11-23 23:11:39,131 INFO L226 Difference]: Without dead ends: 82 [2024-11-23 23:11:39,131 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 [2024-11-23 23:11:39,132 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 [2024-11-23 23:11:39,132 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] [2024-11-23 23:11:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-23 23:11:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-23 23:11:39,134 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) [2024-11-23 23:11:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2024-11-23 23:11:39,135 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 73 [2024-11-23 23:11:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:39,135 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2024-11-23 23:11:39,135 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) [2024-11-23 23:11:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2024-11-23 23:11:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-23 23:11:39,136 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:39,136 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-23 23:11:39,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-23 23:11:39,136 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)] === [2024-11-23 23:11:39,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2047729598, now seen corresponding path program 3 times [2024-11-23 23:11:39,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:39,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570398805] [2024-11-23 23:11:39,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:11:39,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:39,156 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:11:39,156 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-11-23 23:11:39,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570398805] [2024-11-23 23:11:39,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570398805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185555397] [2024-11-23 23:11:39,269 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:11:39,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:39,271 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:39,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 23:11:39,365 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:11:39,365 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:39,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 23:11:39,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:39,387 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 [2024-11-23 23:11:39,664 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 [2024-11-23 23:11:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-11-23 23:11:39,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-11-23 23:11:40,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185555397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:40,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:40,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-23 23:11:40,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122270700] [2024-11-23 23:11:40,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:40,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:11:40,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:40,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:11:40,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:11:40,399 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) [2024-11-23 23:11:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:40,502 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2024-11-23 23:11:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:11:40,503 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 [2024-11-23 23:11:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:40,503 INFO L225 Difference]: With dead ends: 81 [2024-11-23 23:11:40,503 INFO L226 Difference]: Without dead ends: 81 [2024-11-23 23:11:40,504 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 [2024-11-23 23:11:40,504 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:40,504 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:11:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-23 23:11:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-23 23:11:40,506 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) [2024-11-23 23:11:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-11-23 23:11:40,507 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2024-11-23 23:11:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:40,507 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-11-23 23:11:40,507 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) [2024-11-23 23:11:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-11-23 23:11:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-23 23:11:40,508 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:40,508 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-23 23:11:40,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-23 23:11:40,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:40,708 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)] === [2024-11-23 23:11:40,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash 944891959, now seen corresponding path program 1 times [2024-11-23 23:11:40,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:40,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648060664] [2024-11-23 23:11:40,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:40,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-23 23:11:41,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:41,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648060664] [2024-11-23 23:11:41,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648060664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:41,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851797221] [2024-11-23 23:11:41,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:11:41,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:41,077 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:41,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 23:11:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:11:41,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-23 23:11:41,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:41,215 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 [2024-11-23 23:11:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-23 23:11:41,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-23 23:11:42,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851797221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:42,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:42,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-23 23:11:42,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592050028] [2024-11-23 23:11:42,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:42,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 23:11:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:42,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 23:11:42,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:11:42,137 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 20 states, 19 states have (on average 5.105263157894737) internal successors, (97), 20 states have internal predecessors, (97), 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) [2024-11-23 23:11:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:42,524 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2024-11-23 23:11:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 23:11:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.105263157894737) internal successors, (97), 20 states have internal predecessors, (97), 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 [2024-11-23 23:11:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:42,525 INFO L225 Difference]: With dead ends: 111 [2024-11-23 23:11:42,525 INFO L226 Difference]: Without dead ends: 111 [2024-11-23 23:11:42,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2024-11-23 23:11:42,527 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:42,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 23 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:11:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-23 23:11:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2024-11-23 23:11:42,531 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) [2024-11-23 23:11:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2024-11-23 23:11:42,532 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 80 [2024-11-23 23:11:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:42,532 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2024-11-23 23:11:42,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.105263157894737) internal successors, (97), 20 states have internal predecessors, (97), 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) [2024-11-23 23:11:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2024-11-23 23:11:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-23 23:11:42,533 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:42,533 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-23 23:11:42,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 23:11:42,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:42,737 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)] === [2024-11-23 23:11:42,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1617403897, now seen corresponding path program 2 times [2024-11-23 23:11:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435049586] [2024-11-23 23:11:42,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:42,773 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:42,773 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 191 proven. 588 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-23 23:11:43,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:43,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435049586] [2024-11-23 23:11:43,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435049586] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:43,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301822641] [2024-11-23 23:11:43,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:11:43,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:43,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:43,234 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:43,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 23:11:43,370 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:11:43,371 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:43,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 23:11:43,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 373 proven. 356 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-23 23:11:43,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 373 proven. 356 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-23 23:11:43,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301822641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:43,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:43,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 25 [2024-11-23 23:11:43,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220151857] [2024-11-23 23:11:43,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:43,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:11:43,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:43,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:11:43,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:11:43,817 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) [2024-11-23 23:11:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:44,244 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2024-11-23 23:11:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:11:44,245 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 [2024-11-23 23:11:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:44,245 INFO L225 Difference]: With dead ends: 136 [2024-11-23 23:11:44,245 INFO L226 Difference]: Without dead ends: 136 [2024-11-23 23:11:44,247 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 [2024-11-23 23:11:44,247 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:44,247 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:11:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-23 23:11:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2024-11-23 23:11:44,250 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) [2024-11-23 23:11:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2024-11-23 23:11:44,251 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 104 [2024-11-23 23:11:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:44,251 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2024-11-23 23:11:44,251 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) [2024-11-23 23:11:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2024-11-23 23:11:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-23 23:11:44,252 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:44,252 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1] [2024-11-23 23:11:44,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 23:11:44,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-23 23:11:44,457 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)] === [2024-11-23 23:11:44,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash 828686726, now seen corresponding path program 3 times [2024-11-23 23:11:44,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:44,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818399049] [2024-11-23 23:11:44,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:11:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:44,527 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-23 23:11:44,527 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 58 proven. 800 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-23 23:11:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818399049] [2024-11-23 23:11:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818399049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942435230] [2024-11-23 23:11:45,039 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:11:45,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:45,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:45,041 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:45,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 23:11:45,195 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-23 23:11:45,195 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:45,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 23:11:45,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:45,212 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 [2024-11-23 23:11:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 207 proven. 651 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-23 23:11:46,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 858 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-11-23 23:11:47,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942435230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:47,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:47,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-11-23 23:11:47,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400730885] [2024-11-23 23:11:47,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:47,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-23 23:11:47,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:47,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-23 23:11:47,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2024-11-23 23:11:47,155 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) [2024-11-23 23:11:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:51,271 INFO L93 Difference]: Finished difference Result 284 states and 313 transitions. [2024-11-23 23:11:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-23 23:11:51,271 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 [2024-11-23 23:11:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:51,272 INFO L225 Difference]: With dead ends: 284 [2024-11-23 23:11:51,272 INFO L226 Difference]: Without dead ends: 284 [2024-11-23 23:11:51,275 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3236 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2715, Invalid=7997, Unknown=0, NotChecked=0, Total=10712 [2024-11-23 23:11:51,276 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 447 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:51,276 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 24 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:11:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-23 23:11:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 233. [2024-11-23 23:11:51,282 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) [2024-11-23 23:11:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 252 transitions. [2024-11-23 23:11:51,283 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 252 transitions. Word has length 127 [2024-11-23 23:11:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:51,283 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 252 transitions. [2024-11-23 23:11:51,283 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) [2024-11-23 23:11:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 252 transitions. [2024-11-23 23:11:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-11-23 23:11:51,285 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:51,285 INFO L218 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1] [2024-11-23 23:11:51,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 23:11:51,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-23 23:11:51,487 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)] === [2024-11-23 23:11:51,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1149098006, now seen corresponding path program 4 times [2024-11-23 23:11:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:51,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633779102] [2024-11-23 23:11:51,488 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:11:51,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:51,573 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:11:51,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3438 backedges. 2076 proven. 427 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2024-11-23 23:11:52,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:52,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633779102] [2024-11-23 23:11:52,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633779102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:52,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962573288] [2024-11-23 23:11:52,136 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:11:52,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:52,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:52,138 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:52,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 23:11:52,347 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:11:52,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:52,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:11:52,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3438 backedges. 2069 proven. 434 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2024-11-23 23:11:52,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3438 backedges. 2140 proven. 363 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2024-11-23 23:11:52,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962573288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:52,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:52,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 32 [2024-11-23 23:11:52,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765431450] [2024-11-23 23:11:52,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:52,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-23 23:11:52,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:52,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-23 23:11:52,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2024-11-23 23:11:52,996 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) [2024-11-23 23:11:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:53,839 INFO L93 Difference]: Finished difference Result 213 states and 224 transitions. [2024-11-23 23:11:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-23 23:11:53,840 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 [2024-11-23 23:11:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:53,841 INFO L225 Difference]: With dead ends: 213 [2024-11-23 23:11:53,841 INFO L226 Difference]: Without dead ends: 213 [2024-11-23 23:11:53,842 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 [2024-11-23 23:11:53,842 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:53,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 23:11:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-23 23:11:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2024-11-23 23:11:53,847 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) [2024-11-23 23:11:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 221 transitions. [2024-11-23 23:11:53,848 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 221 transitions. Word has length 205 [2024-11-23 23:11:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:53,848 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 221 transitions. [2024-11-23 23:11:53,849 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) [2024-11-23 23:11:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 221 transitions. [2024-11-23 23:11:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2024-11-23 23:11:53,851 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:53,851 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1] [2024-11-23 23:11:53,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 23:11:54,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-23 23:11:54,055 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)] === [2024-11-23 23:11:54,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash -370685810, now seen corresponding path program 5 times [2024-11-23 23:11:54,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:54,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864929623] [2024-11-23 23:11:54,056 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:11:54,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:54,390 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-23 23:11:54,390 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3603 backedges. 1910 proven. 1293 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-23 23:11:55,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:55,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864929623] [2024-11-23 23:11:55,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864929623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:55,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435527903] [2024-11-23 23:11:55,194 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:11:55,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:55,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:55,197 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:55,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 23:11:55,786 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-23 23:11:55,787 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:55,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 23:11:55,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:11:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3603 backedges. 1910 proven. 1293 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-23 23:11:56,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:11:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3603 backedges. 1910 proven. 1293 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2024-11-23 23:11:56,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435527903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:11:56,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:11:56,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 43 [2024-11-23 23:11:56,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17388715] [2024-11-23 23:11:56,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:11:56,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-23 23:11:56,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:11:56,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-23 23:11:56,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2024-11-23 23:11:56,767 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) [2024-11-23 23:11:58,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:11:58,063 INFO L93 Difference]: Finished difference Result 331 states and 347 transitions. [2024-11-23 23:11:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-23 23:11:58,063 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 [2024-11-23 23:11:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:11:58,065 INFO L225 Difference]: With dead ends: 331 [2024-11-23 23:11:58,065 INFO L226 Difference]: Without dead ends: 331 [2024-11-23 23:11:58,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 385 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1809, Invalid=7503, Unknown=0, NotChecked=0, Total=9312 [2024-11-23 23:11:58,071 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:11:58,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 31 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 23:11:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-23 23:11:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2024-11-23 23:11:58,081 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) [2024-11-23 23:11:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 343 transitions. [2024-11-23 23:11:58,082 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 343 transitions. Word has length 209 [2024-11-23 23:11:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:11:58,083 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 343 transitions. [2024-11-23 23:11:58,083 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) [2024-11-23 23:11:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 343 transitions. [2024-11-23 23:11:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2024-11-23 23:11:58,087 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:11:58,087 INFO L218 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-23 23:11:58,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-23 23:11:58,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-23 23:11:58,287 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)] === [2024-11-23 23:11:58,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:11:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2142135153, now seen corresponding path program 6 times [2024-11-23 23:11:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:11:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257437016] [2024-11-23 23:11:58,288 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:11:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:11:58,747 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-11-23 23:11:58,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:11:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7587 backedges. 4525 proven. 697 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2024-11-23 23:11:59,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:11:59,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257437016] [2024-11-23 23:11:59,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257437016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:11:59,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430703232] [2024-11-23 23:11:59,445 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:11:59,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:11:59,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:11:59,447 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:11:59,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 23:12:00,092 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-11-23 23:12:00,092 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:00,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:12:00,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:12:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7587 backedges. 4608 proven. 601 refuted. 0 times theorem prover too weak. 2378 trivial. 0 not checked. [2024-11-23 23:12:00,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:12:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7587 backedges. 4608 proven. 601 refuted. 0 times theorem prover too weak. 2378 trivial. 0 not checked. [2024-11-23 23:12:00,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430703232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:12:00,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:12:00,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 25 [2024-11-23 23:12:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462212286] [2024-11-23 23:12:00,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:12:00,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:12:00,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:12:00,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:12:00,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:12:00,701 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) [2024-11-23 23:12:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:12:01,634 INFO L93 Difference]: Finished difference Result 327 states and 338 transitions. [2024-11-23 23:12:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-23 23:12:01,635 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 [2024-11-23 23:12:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:12:01,636 INFO L225 Difference]: With dead ends: 327 [2024-11-23 23:12:01,637 INFO L226 Difference]: Without dead ends: 327 [2024-11-23 23:12:01,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 584 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=829, Invalid=2593, Unknown=0, NotChecked=0, Total=3422 [2024-11-23 23:12:01,639 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:12:01,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 23:12:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-23 23:12:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2024-11-23 23:12:01,650 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) [2024-11-23 23:12:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 338 transitions. [2024-11-23 23:12:01,651 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 338 transitions. Word has length 302 [2024-11-23 23:12:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:12:01,652 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 338 transitions. [2024-11-23 23:12:01,652 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) [2024-11-23 23:12:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 338 transitions. [2024-11-23 23:12:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2024-11-23 23:12:01,662 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:12:01,663 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-23 23:12:01,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-23 23:12:01,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:01,863 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)] === [2024-11-23 23:12:01,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:12:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1351226119, now seen corresponding path program 7 times [2024-11-23 23:12:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:12:01,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268286111] [2024-11-23 23:12:01,864 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:12:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:12:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:12:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 5461 proven. 340 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2024-11-23 23:12:03,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:12:03,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268286111] [2024-11-23 23:12:03,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268286111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:12:03,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438567803] [2024-11-23 23:12:03,074 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:12:03,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:03,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:12:03,076 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:12:03,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 23:12:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:12:03,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:12:03,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:12:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 5598 proven. 922 refuted. 0 times theorem prover too weak. 1811 trivial. 0 not checked. [2024-11-23 23:12:03,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:12:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8331 backedges. 5598 proven. 922 refuted. 0 times theorem prover too weak. 1811 trivial. 0 not checked. [2024-11-23 23:12:04,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438567803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:12:04,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:12:04,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 40 [2024-11-23 23:12:04,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163989361] [2024-11-23 23:12:04,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:12:04,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-23 23:12:04,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:12:04,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-23 23:12:04,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2024-11-23 23:12:04,501 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) [2024-11-23 23:12:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:12:06,520 INFO L93 Difference]: Finished difference Result 327 states and 334 transitions. [2024-11-23 23:12:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-23 23:12:06,521 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 [2024-11-23 23:12:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:12:06,522 INFO L225 Difference]: With dead ends: 327 [2024-11-23 23:12:06,522 INFO L226 Difference]: Without dead ends: 327 [2024-11-23 23:12:06,524 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 600 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1237, Invalid=5405, Unknown=0, NotChecked=0, Total=6642 [2024-11-23 23:12:06,524 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:12:06,524 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 54 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-23 23:12:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-23 23:12:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2024-11-23 23:12:06,532 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) [2024-11-23 23:12:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 334 transitions. [2024-11-23 23:12:06,533 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 334 transitions. Word has length 314 [2024-11-23 23:12:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:12:06,534 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 334 transitions. [2024-11-23 23:12:06,534 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) [2024-11-23 23:12:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 334 transitions. [2024-11-23 23:12:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2024-11-23 23:12:06,540 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:12:06,540 INFO L218 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-23 23:12:06,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-23 23:12:06,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:06,744 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)] === [2024-11-23 23:12:06,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:12:06,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2012628871, now seen corresponding path program 8 times [2024-11-23 23:12:06,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:12:06,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630021795] [2024-11-23 23:12:06,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:12:06,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:12:06,879 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:12:06,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8847 backedges. 5938 proven. 1691 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2024-11-23 23:12:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:12:07,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630021795] [2024-11-23 23:12:07,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630021795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:12:07,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978533372] [2024-11-23 23:12:07,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:12:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:12:07,855 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:12:07,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 23:12:08,199 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:12:08,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:08,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-23 23:12:08,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:12:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8847 backedges. 6291 proven. 1338 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2024-11-23 23:12:08,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:12:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8847 backedges. 6291 proven. 1338 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2024-11-23 23:12:09,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978533372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:12:09,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:12:09,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 30 [2024-11-23 23:12:09,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986254630] [2024-11-23 23:12:09,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:12:09,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-23 23:12:09,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:12:09,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-23 23:12:09,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2024-11-23 23:12:09,174 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) [2024-11-23 23:12:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:12:10,286 INFO L93 Difference]: Finished difference Result 327 states and 331 transitions. [2024-11-23 23:12:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-23 23:12:10,287 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 [2024-11-23 23:12:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:12:10,288 INFO L225 Difference]: With dead ends: 327 [2024-11-23 23:12:10,288 INFO L226 Difference]: Without dead ends: 327 [2024-11-23 23:12:10,290 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 [2024-11-23 23:12:10,291 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:12:10,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 107 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 23:12:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-23 23:12:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2024-11-23 23:12:10,298 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) [2024-11-23 23:12:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 331 transitions. [2024-11-23 23:12:10,299 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 331 transitions. Word has length 322 [2024-11-23 23:12:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:12:10,300 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 331 transitions. [2024-11-23 23:12:10,300 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) [2024-11-23 23:12:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 331 transitions. [2024-11-23 23:12:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2024-11-23 23:12:10,302 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:12:10,302 INFO L218 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-23 23:12:10,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-23 23:12:10,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:10,506 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)] === [2024-11-23 23:12:10,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:12:10,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1010231425, now seen corresponding path program 9 times [2024-11-23 23:12:10,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:12:10,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393813673] [2024-11-23 23:12:10,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:12:10,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:12:10,607 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-23 23:12:10,607 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9111 backedges. 0 proven. 2631 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2024-11-23 23:12:11,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:12:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393813673] [2024-11-23 23:12:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393813673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:12:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753427939] [2024-11-23 23:12:11,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:12:11,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:12:11,185 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:12:11,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 23:12:11,544 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-23 23:12:11,544 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:11,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 23:12:11,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:12:11,563 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 [2024-11-23 23:12:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9111 backedges. 0 proven. 2631 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2024-11-23 23:12:13,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:12:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9111 backedges. 0 proven. 2631 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2024-11-23 23:12:14,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753427939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:12:14,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:12:14,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2024-11-23 23:12:14,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235470001] [2024-11-23 23:12:14,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:12:14,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-23 23:12:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:12:14,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-23 23:12:14,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1115, Unknown=0, NotChecked=0, Total=1640 [2024-11-23 23:12:14,697 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) [2024-11-23 23:12:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:12:15,471 INFO L93 Difference]: Finished difference Result 437 states and 465 transitions. [2024-11-23 23:12:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-23 23:12:15,472 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 [2024-11-23 23:12:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:12:15,474 INFO L225 Difference]: With dead ends: 437 [2024-11-23 23:12:15,474 INFO L226 Difference]: Without dead ends: 437 [2024-11-23 23:12:15,475 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 [2024-11-23 23:12:15,476 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 150 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:12:15,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 28 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:12:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-23 23:12:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 375. [2024-11-23 23:12:15,484 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) [2024-11-23 23:12:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 391 transitions. [2024-11-23 23:12:15,486 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 391 transitions. Word has length 326 [2024-11-23 23:12:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:12:15,486 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 391 transitions. [2024-11-23 23:12:15,487 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) [2024-11-23 23:12:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 391 transitions. [2024-11-23 23:12:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2024-11-23 23:12:15,489 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:12:15,489 INFO L218 NwaCegarLoop]: trace histogram [77, 77, 76, 76, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1] [2024-11-23 23:12:15,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-23 23:12:15,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:15,690 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)] === [2024-11-23 23:12:15,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:12:15,690 INFO L85 PathProgramCache]: Analyzing trace with hash 861464351, now seen corresponding path program 10 times [2024-11-23 23:12:15,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:12:15,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463594778] [2024-11-23 23:12:15,691 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:12:15,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:12:15,783 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:12:15,784 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12591 backedges. 1031 proven. 10852 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2024-11-23 23:12:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:12:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463594778] [2024-11-23 23:12:17,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463594778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:12:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547964539] [2024-11-23 23:12:17,552 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:12:17,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:17,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:12:17,554 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:12:17,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 23:12:17,893 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:12:17,893 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:17,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-23 23:12:17,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:12:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12591 backedges. 3349 proven. 8292 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-11-23 23:12:18,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:12:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12591 backedges. 3349 proven. 8292 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2024-11-23 23:12:19,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547964539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:12:19,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:12:19,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27, 27] total 57 [2024-11-23 23:12:19,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392864584] [2024-11-23 23:12:19,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:12:19,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-23 23:12:19,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:12:19,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-23 23:12:19,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=2607, Unknown=0, NotChecked=0, Total=3192 [2024-11-23 23:12:19,613 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) [2024-11-23 23:12:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:12:22,874 INFO L93 Difference]: Finished difference Result 532 states and 553 transitions. [2024-11-23 23:12:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2024-11-23 23:12:22,875 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 [2024-11-23 23:12:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:12:22,878 INFO L225 Difference]: With dead ends: 532 [2024-11-23 23:12:22,878 INFO L226 Difference]: Without dead ends: 532 [2024-11-23 23:12:22,882 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 708 SyntacticMatches, 21 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10072 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4210, Invalid=23846, Unknown=0, NotChecked=0, Total=28056 [2024-11-23 23:12:22,883 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 109 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:12:22,883 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 50 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 23:12:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-11-23 23:12:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 473. [2024-11-23 23:12:22,893 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) [2024-11-23 23:12:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 492 transitions. [2024-11-23 23:12:22,894 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 492 transitions. Word has length 374 [2024-11-23 23:12:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:12:22,896 INFO L471 AbstractCegarLoop]: Abstraction has 473 states and 492 transitions. [2024-11-23 23:12:22,896 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) [2024-11-23 23:12:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 492 transitions. [2024-11-23 23:12:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2024-11-23 23:12:22,899 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:12:22,900 INFO L218 NwaCegarLoop]: trace histogram [86, 86, 85, 85, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1] [2024-11-23 23:12:22,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-23 23:12:23,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-23 23:12:23,101 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)] === [2024-11-23 23:12:23,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:12:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2135906714, now seen corresponding path program 11 times [2024-11-23 23:12:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:12:23,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627554834] [2024-11-23 23:12:23,101 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:12:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:12:23,924 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-23 23:12:23,924 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15730 backedges. 10296 proven. 529 refuted. 0 times theorem prover too weak. 4905 trivial. 0 not checked. [2024-11-23 23:12:25,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:12:25,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627554834] [2024-11-23 23:12:25,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627554834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:12:25,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924539353] [2024-11-23 23:12:25,422 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:12:25,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:25,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:12:25,425 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:12:25,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 23:12:27,512 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-23 23:12:27,512 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:27,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-23 23:12:27,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:12:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15730 backedges. 10945 proven. 2155 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2024-11-23 23:12:28,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:12:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15730 backedges. 11323 proven. 1777 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2024-11-23 23:12:28,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924539353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:12:28,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:12:28,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2024-11-23 23:12:28,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326294873] [2024-11-23 23:12:28,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:12:28,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-23 23:12:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:12:28,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-23 23:12:28,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1678, Unknown=0, NotChecked=0, Total=2070 [2024-11-23 23:12:28,773 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) [2024-11-23 23:12:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:12:31,122 INFO L93 Difference]: Finished difference Result 426 states and 440 transitions. [2024-11-23 23:12:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-23 23:12:31,122 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 [2024-11-23 23:12:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:12:31,124 INFO L225 Difference]: With dead ends: 426 [2024-11-23 23:12:31,124 INFO L226 Difference]: Without dead ends: 426 [2024-11-23 23:12:31,126 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 795 SyntacticMatches, 17 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2447, Invalid=9109, Unknown=0, NotChecked=0, Total=11556 [2024-11-23 23:12:31,127 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:12:31,127 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 81 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-23 23:12:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-23 23:12:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2024-11-23 23:12:31,153 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) [2024-11-23 23:12:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 440 transitions. [2024-11-23 23:12:31,154 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 440 transitions. Word has length 417 [2024-11-23 23:12:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:12:31,155 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 440 transitions. [2024-11-23 23:12:31,155 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) [2024-11-23 23:12:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 440 transitions. [2024-11-23 23:12:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2024-11-23 23:12:31,158 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:12:31,158 INFO L218 NwaCegarLoop]: trace histogram [87, 87, 86, 86, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1] [2024-11-23 23:12:31,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-23 23:12:31,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-23 23:12:31,359 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)] === [2024-11-23 23:12:31,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:12:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 836169438, now seen corresponding path program 12 times [2024-11-23 23:12:31,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:12:31,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850219516] [2024-11-23 23:12:31,360 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:12:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:12:32,229 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-11-23 23:12:32,230 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16083 backedges. 2412 proven. 6288 refuted. 0 times theorem prover too weak. 7383 trivial. 0 not checked. [2024-11-23 23:12:33,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:12:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850219516] [2024-11-23 23:12:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850219516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:12:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745645089] [2024-11-23 23:12:33,814 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:12:33,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:33,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:12:33,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:12:33,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-23 23:12:35,661 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-11-23 23:12:35,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:12:35,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-23 23:12:35,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:12:35,688 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 [2024-11-23 23:12:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16083 backedges. 2412 proven. 6288 refuted. 0 times theorem prover too weak. 7383 trivial. 0 not checked. [2024-11-23 23:12:37,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:12:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16083 backedges. 0 proven. 8700 refuted. 0 times theorem prover too weak. 7383 trivial. 0 not checked. [2024-11-23 23:12:39,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745645089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:12:39,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:12:39,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2024-11-23 23:12:39,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148433575] [2024-11-23 23:12:39,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:12:39,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-23 23:12:39,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:12:39,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-23 23:12:39,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=2384, Unknown=0, NotChecked=0, Total=3080 [2024-11-23 23:12:39,925 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) [2024-11-23 23:12:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:12:49,999 INFO L93 Difference]: Finished difference Result 722 states and 775 transitions. [2024-11-23 23:12:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-11-23 23:12:50,000 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 [2024-11-23 23:12:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:12:50,003 INFO L225 Difference]: With dead ends: 722 [2024-11-23 23:12:50,003 INFO L226 Difference]: Without dead ends: 722 [2024-11-23 23:12:50,007 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12382 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=9392, Invalid=25018, Unknown=0, NotChecked=0, Total=34410 [2024-11-23 23:12:50,007 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 644 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:12:50,008 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 24 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 23:12:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2024-11-23 23:12:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 623. [2024-11-23 23:12:50,021 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) [2024-11-23 23:12:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 654 transitions. [2024-11-23 23:12:50,022 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 654 transitions. Word has length 421 [2024-11-23 23:12:50,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:12:50,023 INFO L471 AbstractCegarLoop]: Abstraction has 623 states and 654 transitions. [2024-11-23 23:12:50,023 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) [2024-11-23 23:12:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 654 transitions. [2024-11-23 23:12:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2024-11-23 23:12:50,027 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:12:50,027 INFO L218 NwaCegarLoop]: trace histogram [121, 121, 120, 120, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-23 23:12:50,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-23 23:12:50,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-23 23:12:50,229 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)] === [2024-11-23 23:12:50,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:12:50,230 INFO L85 PathProgramCache]: Analyzing trace with hash 627201694, now seen corresponding path program 13 times [2024-11-23 23:12:50,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:12:50,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169982226] [2024-11-23 23:12:50,230 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:12:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:12:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:12:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30858 backedges. 22020 proven. 3926 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2024-11-23 23:12:52,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:12:52,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169982226] [2024-11-23 23:12:52,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169982226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:12:52,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950871108] [2024-11-23 23:12:52,010 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:12:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:12:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:12:52,013 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:12:52,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-23 23:12:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:12:52,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-23 23:12:52,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:12:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30858 backedges. 22670 proven. 3276 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2024-11-23 23:12:53,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:12:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30858 backedges. 22670 proven. 3276 refuted. 0 times theorem prover too weak. 4912 trivial. 0 not checked. [2024-11-23 23:12:53,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950871108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:12:53,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:12:53,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 39 [2024-11-23 23:12:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547267408] [2024-11-23 23:12:53,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:12:53,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-23 23:12:53,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:12:53,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-23 23:12:53,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2024-11-23 23:12:53,914 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) [2024-11-23 23:12:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:12:55,824 INFO L93 Difference]: Finished difference Result 579 states and 602 transitions. [2024-11-23 23:12:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-23 23:12:55,825 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 [2024-11-23 23:12:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:12:55,828 INFO L225 Difference]: With dead ends: 579 [2024-11-23 23:12:55,828 INFO L226 Difference]: Without dead ends: 579 [2024-11-23 23:12:55,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1107 SyntacticMatches, 21 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3641, Invalid=9931, Unknown=0, NotChecked=0, Total=13572 [2024-11-23 23:12:55,830 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 69 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:12:55,830 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 141 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:12:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-23 23:12:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 576. [2024-11-23 23:12:55,838 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) [2024-11-23 23:12:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 599 transitions. [2024-11-23 23:12:55,839 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 599 transitions. Word has length 571 [2024-11-23 23:12:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:12:55,840 INFO L471 AbstractCegarLoop]: Abstraction has 576 states and 599 transitions. [2024-11-23 23:12:55,840 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) [2024-11-23 23:12:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 599 transitions. [2024-11-23 23:12:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2024-11-23 23:12:55,844 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:12:55,844 INFO L218 NwaCegarLoop]: trace histogram [122, 122, 121, 121, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-23 23:12:55,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-23 23:12:56,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-23 23:12:56,045 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)] === [2024-11-23 23:12:56,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:12:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash 674439958, now seen corresponding path program 14 times [2024-11-23 23:12:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:12:56,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640925976] [2024-11-23 23:12:56,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:12:56,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:12:56,218 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:12:56,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:13:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31353 backedges. 2211 proven. 27898 refuted. 0 times theorem prover too weak. 1244 trivial. 0 not checked. [2024-11-23 23:13:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:13:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640925976] [2024-11-23 23:13:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640925976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:13:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473838330] [2024-11-23 23:13:00,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:13:00,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:13:00,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:13:00,063 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:13:00,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-23 23:13:00,604 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:13:00,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:13:00,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 2005 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-23 23:13:00,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:13:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 31353 backedges. 12207 proven. 15972 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2024-11-23 23:13:01,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:13:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 31353 backedges. 12207 proven. 15972 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2024-11-23 23:13:02,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473838330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:13:02,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:13:02,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 28, 28] total 83 [2024-11-23 23:13:02,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333423637] [2024-11-23 23:13:02,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:13:02,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-23 23:13:02,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:13:02,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-23 23:13:02,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=5684, Unknown=0, NotChecked=0, Total=6806 [2024-11-23 23:13:02,638 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) [2024-11-23 23:13:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:13:05,917 INFO L93 Difference]: Finished difference Result 639 states and 662 transitions. [2024-11-23 23:13:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-23 23:13:05,917 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 [2024-11-23 23:13:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:13:05,919 INFO L225 Difference]: With dead ends: 639 [2024-11-23 23:13:05,919 INFO L226 Difference]: Without dead ends: 639 [2024-11-23 23:13:05,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1111 SyntacticMatches, 17 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12469 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6458, Invalid=27582, Unknown=0, NotChecked=0, Total=34040 [2024-11-23 23:13:05,922 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:13:05,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 60 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-23 23:13:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2024-11-23 23:13:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 635. [2024-11-23 23:13:05,931 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) [2024-11-23 23:13:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 658 transitions. [2024-11-23 23:13:05,933 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 658 transitions. Word has length 575 [2024-11-23 23:13:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:13:05,934 INFO L471 AbstractCegarLoop]: Abstraction has 635 states and 658 transitions. [2024-11-23 23:13:05,934 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) [2024-11-23 23:13:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 658 transitions. [2024-11-23 23:13:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2024-11-23 23:13:05,938 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:13:05,938 INFO L218 NwaCegarLoop]: trace histogram [134, 134, 133, 133, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1] [2024-11-23 23:13:05,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-23 23:13:06,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-23 23:13:06,139 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)] === [2024-11-23 23:13:06,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:13:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1221100727, now seen corresponding path program 15 times [2024-11-23 23:13:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:13:06,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936859264] [2024-11-23 23:13:06,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:13:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:13:06,345 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-23 23:13:06,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:13:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 37825 backedges. 11284 proven. 11817 refuted. 0 times theorem prover too weak. 14724 trivial. 0 not checked. [2024-11-23 23:13:07,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:13:07,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936859264] [2024-11-23 23:13:07,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936859264] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:13:07,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613652311] [2024-11-23 23:13:07,626 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:13:07,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:13:07,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:13:07,628 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:13:07,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-23 23:13:08,460 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-23 23:13:08,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:13:08,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-23 23:13:08,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:13:08,482 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 [2024-11-23 23:13:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 37825 backedges. 11201 proven. 11817 refuted. 0 times theorem prover too weak. 14807 trivial. 0 not checked. [2024-11-23 23:13:11,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:13:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 37825 backedges. 0 proven. 23018 refuted. 0 times theorem prover too weak. 14807 trivial. 0 not checked. [2024-11-23 23:13:14,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613652311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:13:14,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:13:14,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 65 [2024-11-23 23:13:14,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830875520] [2024-11-23 23:13:14,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:13:14,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-23 23:13:14,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:13:14,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-23 23:13:14,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=3338, Unknown=0, NotChecked=0, Total=4290 [2024-11-23 23:13:14,669 INFO L87 Difference]: Start difference. First operand 635 states and 658 transitions. Second operand has 66 states, 65 states have (on average 4.138461538461539) internal successors, (269), 66 states have internal predecessors, (269), 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) [2024-11-23 23:13:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:13:37,981 INFO L93 Difference]: Finished difference Result 1373 states and 1492 transitions. [2024-11-23 23:13:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2024-11-23 23:13:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.138461538461539) internal successors, (269), 66 states have internal predecessors, (269), 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 [2024-11-23 23:13:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:13:37,985 INFO L225 Difference]: With dead ends: 1373 [2024-11-23 23:13:37,985 INFO L226 Difference]: Without dead ends: 1373 [2024-11-23 23:13:37,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1505 GetRequests, 1217 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32896 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=22194, Invalid=61616, Unknown=0, NotChecked=0, Total=83810 [2024-11-23 23:13:37,989 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 860 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:13:37,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 31 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 23:13:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2024-11-23 23:13:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 953. [2024-11-23 23:13:38,005 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) [2024-11-23 23:13:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1008 transitions. [2024-11-23 23:13:38,007 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1008 transitions. Word has length 630 [2024-11-23 23:13:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:13:38,008 INFO L471 AbstractCegarLoop]: Abstraction has 953 states and 1008 transitions. [2024-11-23 23:13:38,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.138461538461539) internal successors, (269), 66 states have internal predecessors, (269), 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) [2024-11-23 23:13:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1008 transitions. [2024-11-23 23:13:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2024-11-23 23:13:38,015 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:13:38,015 INFO L218 NwaCegarLoop]: trace histogram [191, 191, 190, 190, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1] [2024-11-23 23:13:38,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-23 23:13:38,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-23 23:13:38,216 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)] === [2024-11-23 23:13:38,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:13:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash -919202290, now seen corresponding path program 16 times [2024-11-23 23:13:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:13:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373045159] [2024-11-23 23:13:38,217 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:13:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:13:38,426 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:13:38,427 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:13:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76318 backedges. 46415 proven. 1122 refuted. 0 times theorem prover too weak. 28781 trivial. 0 not checked. [2024-11-23 23:13:40,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:13:40,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373045159] [2024-11-23 23:13:40,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373045159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:13:40,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497103032] [2024-11-23 23:13:40,282 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:13:40,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:13:40,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:13:40,284 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:13:40,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-23 23:13:40,986 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:13:40,986 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:13:40,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 2733 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 23:13:41,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:13:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 76318 backedges. 53520 proven. 5730 refuted. 0 times theorem prover too weak. 17068 trivial. 0 not checked. [2024-11-23 23:13:42,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:13:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 76318 backedges. 53987 proven. 5263 refuted. 0 times theorem prover too weak. 17068 trivial. 0 not checked. [2024-11-23 23:13:43,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497103032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:13:43,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:13:43,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2024-11-23 23:13:43,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111111935] [2024-11-23 23:13:43,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:13:43,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-23 23:13:43,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:13:43,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-23 23:13:43,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=3024, Unknown=0, NotChecked=0, Total=3660 [2024-11-23 23:13:43,425 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) [2024-11-23 23:13:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:13:49,407 INFO L93 Difference]: Finished difference Result 908 states and 952 transitions. [2024-11-23 23:13:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-23 23:13:49,407 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 [2024-11-23 23:13:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:13:49,409 INFO L225 Difference]: With dead ends: 908 [2024-11-23 23:13:49,409 INFO L226 Difference]: Without dead ends: 908 [2024-11-23 23:13:49,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1905 GetRequests, 1703 SyntacticMatches, 25 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9864 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5872, Invalid=25990, Unknown=0, NotChecked=0, Total=31862 [2024-11-23 23:13:49,411 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 88 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 5040 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 5056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:13:49,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 101 Invalid, 5056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5040 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-23 23:13:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2024-11-23 23:13:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 902. [2024-11-23 23:13:49,422 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) [2024-11-23 23:13:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 946 transitions. [2024-11-23 23:13:49,424 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 946 transitions. Word has length 879 [2024-11-23 23:13:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:13:49,425 INFO L471 AbstractCegarLoop]: Abstraction has 902 states and 946 transitions. [2024-11-23 23:13:49,425 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) [2024-11-23 23:13:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 946 transitions. [2024-11-23 23:13:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 888 [2024-11-23 23:13:49,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:13:49,432 INFO L218 NwaCegarLoop]: trace histogram [193, 193, 192, 192, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1] [2024-11-23 23:13:49,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-23 23:13:49,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-23 23:13:49,632 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)] === [2024-11-23 23:13:49,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:13:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1099876750, now seen corresponding path program 17 times [2024-11-23 23:13:49,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:13:49,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534654795] [2024-11-23 23:13:49,633 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:13:49,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:13:52,111 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-23 23:13:52,111 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:13:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 77880 backedges. 47855 proven. 1244 refuted. 0 times theorem prover too weak. 28781 trivial. 0 not checked. [2024-11-23 23:13:54,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:13:54,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534654795] [2024-11-23 23:13:54,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534654795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:13:54,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146868968] [2024-11-23 23:13:54,378 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:13:54,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:13:54,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:13:54,380 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:13:54,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-23 23:14:07,646 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-23 23:14:07,646 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:14:07,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 2524 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 23:14:07,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:14:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 77880 backedges. 57275 proven. 7474 refuted. 0 times theorem prover too weak. 13131 trivial. 0 not checked. [2024-11-23 23:14:08,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:14:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 77880 backedges. 58563 proven. 6186 refuted. 0 times theorem prover too weak. 13131 trivial. 0 not checked. [2024-11-23 23:14:10,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146868968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:14:10,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:14:10,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2024-11-23 23:14:10,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259600007] [2024-11-23 23:14:10,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:14:10,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-23 23:14:10,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:14:10,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-23 23:14:10,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2024-11-23 23:14:10,181 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) [2024-11-23 23:14:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:14:17,538 INFO L93 Difference]: Finished difference Result 909 states and 950 transitions. [2024-11-23 23:14:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2024-11-23 23:14:17,538 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 [2024-11-23 23:14:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:14:17,540 INFO L225 Difference]: With dead ends: 909 [2024-11-23 23:14:17,540 INFO L226 Difference]: Without dead ends: 909 [2024-11-23 23:14:17,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1932 GetRequests, 1715 SyntacticMatches, 26 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11038 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7300, Invalid=29756, Unknown=0, NotChecked=0, Total=37056 [2024-11-23 23:14:17,542 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 84 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 5954 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 5965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 5954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:14:17,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 122 Invalid, 5965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 5954 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-23 23:14:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2024-11-23 23:14:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 906. [2024-11-23 23:14:17,553 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) [2024-11-23 23:14:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 947 transitions. [2024-11-23 23:14:17,555 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 947 transitions. Word has length 887 [2024-11-23 23:14:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:14:17,556 INFO L471 AbstractCegarLoop]: Abstraction has 906 states and 947 transitions. [2024-11-23 23:14:17,556 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) [2024-11-23 23:14:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 947 transitions. [2024-11-23 23:14:17,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2024-11-23 23:14:17,563 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:14:17,563 INFO L218 NwaCegarLoop]: trace histogram [194, 194, 193, 193, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1] [2024-11-23 23:14:17,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-23 23:14:17,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:14:17,764 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)] === [2024-11-23 23:14:17,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:14:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash 884645526, now seen corresponding path program 18 times [2024-11-23 23:14:17,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:14:17,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271923143] [2024-11-23 23:14:17,765 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:14:17,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:14:18,953 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-23 23:14:18,953 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:14:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 78667 backedges. 43 proven. 70448 refuted. 0 times theorem prover too weak. 8176 trivial. 0 not checked. [2024-11-23 23:14:21,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:14:21,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271923143] [2024-11-23 23:14:21,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271923143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:14:21,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475284870] [2024-11-23 23:14:21,941 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:14:21,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:14:21,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:14:21,943 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:14:21,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-23 23:14:25,609 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-23 23:14:25,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:14:25,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 23:14:25,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:14:25,660 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 [2024-11-23 23:14:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 78667 backedges. 43 proven. 72710 refuted. 0 times theorem prover too weak. 5914 trivial. 0 not checked. [2024-11-23 23:14:30,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:14:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 78667 backedges. 0 proven. 72753 refuted. 0 times theorem prover too weak. 5914 trivial. 0 not checked. [2024-11-23 23:14:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475284870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:14:35,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:14:35,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 68 [2024-11-23 23:14:35,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820587881] [2024-11-23 23:14:35,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:14:35,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-23 23:14:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:14:35,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-23 23:14:35,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=982, Invalid=3710, Unknown=0, NotChecked=0, Total=4692 [2024-11-23 23:14:35,433 INFO L87 Difference]: Start difference. First operand 906 states and 947 transitions. Second operand has 69 states, 68 states have (on average 7.794117647058823) internal successors, (530), 69 states have internal predecessors, (530), 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) [2024-11-23 23:16:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:16:25,830 INFO L93 Difference]: Finished difference Result 6246 states and 6863 transitions. [2024-11-23 23:16:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 641 states. [2024-11-23 23:16:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 7.794117647058823) internal successors, (530), 69 states have internal predecessors, (530), 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 [2024-11-23 23:16:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:16:25,844 INFO L225 Difference]: With dead ends: 6246 [2024-11-23 23:16:25,844 INFO L226 Difference]: Without dead ends: 6246 [2024-11-23 23:16:25,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2444 GetRequests, 1739 SyntacticMatches, 0 SemanticMatches, 705 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248421 ImplicationChecksByTransitivity, 110.5s TimeCoverageRelationStatistics Valid=120451, Invalid=378691, Unknown=0, NotChecked=0, Total=499142 [2024-11-23 23:16:25,863 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 2348 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2348 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:16:25,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2348 Valid, 73 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-23 23:16:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2024-11-23 23:16:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 1911. [2024-11-23 23:16:25,903 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) [2024-11-23 23:16:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 1967 transitions. [2024-11-23 23:16:25,906 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 1967 transitions. Word has length 891 [2024-11-23 23:16:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:16:25,907 INFO L471 AbstractCegarLoop]: Abstraction has 1911 states and 1967 transitions. [2024-11-23 23:16:25,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 7.794117647058823) internal successors, (530), 69 states have internal predecessors, (530), 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) [2024-11-23 23:16:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 1967 transitions. [2024-11-23 23:16:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1897 [2024-11-23 23:16:25,933 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:16:25,933 INFO L218 NwaCegarLoop]: trace histogram [419, 419, 418, 418, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:16:25,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-23 23:16:26,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-23 23:16:26,134 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)] === [2024-11-23 23:16:26,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:16:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 897544079, now seen corresponding path program 19 times [2024-11-23 23:16:26,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:16:26,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103153947] [2024-11-23 23:16:26,135 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:16:26,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:16:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:16:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 366172 backedges. 145948 proven. 1476 refuted. 0 times theorem prover too weak. 218748 trivial. 0 not checked. [2024-11-23 23:16:34,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:16:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103153947] [2024-11-23 23:16:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103153947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:16:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995770689] [2024-11-23 23:16:34,805 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:16:34,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:16:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:16:34,807 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:16:34,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-23 23:16:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:16:36,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 6474 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 23:16:36,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:16:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 366172 backedges. 188803 proven. 7918 refuted. 0 times theorem prover too weak. 169451 trivial. 0 not checked. [2024-11-23 23:16:37,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:16:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 366172 backedges. 188803 proven. 7918 refuted. 0 times theorem prover too weak. 169451 trivial. 0 not checked. [2024-11-23 23:16:39,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995770689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:16:39,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:16:39,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 65 [2024-11-23 23:16:39,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512538449] [2024-11-23 23:16:39,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:16:39,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-23 23:16:39,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:16:39,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-23 23:16:39,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2024-11-23 23:16:39,018 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) [2024-11-23 23:16:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:16:48,385 INFO L93 Difference]: Finished difference Result 2098 states and 2153 transitions. [2024-11-23 23:16:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2024-11-23 23:16:48,385 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 [2024-11-23 23:16:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:16:48,390 INFO L225 Difference]: With dead ends: 2098 [2024-11-23 23:16:48,390 INFO L226 Difference]: Without dead ends: 2098 [2024-11-23 23:16:48,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3976 GetRequests, 3733 SyntacticMatches, 29 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14503 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=8067, Invalid=38373, Unknown=0, NotChecked=0, Total=46440 [2024-11-23 23:16:48,394 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 86 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 8725 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 8741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 8725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:16:48,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 109 Invalid, 8741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 8725 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-23 23:16:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2024-11-23 23:16:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1985. [2024-11-23 23:16:48,422 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) [2024-11-23 23:16:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2039 transitions. [2024-11-23 23:16:48,426 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2039 transitions. Word has length 1896 [2024-11-23 23:16:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:16:48,429 INFO L471 AbstractCegarLoop]: Abstraction has 1985 states and 2039 transitions. [2024-11-23 23:16:48,430 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) [2024-11-23 23:16:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2039 transitions. [2024-11-23 23:16:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1957 [2024-11-23 23:16:48,491 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:16:48,492 INFO L218 NwaCegarLoop]: trace histogram [434, 434, 433, 433, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:16:48,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-23 23:16:48,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-23 23:16:48,693 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)] === [2024-11-23 23:16:48,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:16:48,694 INFO L85 PathProgramCache]: Analyzing trace with hash 964512663, now seen corresponding path program 20 times [2024-11-23 23:16:48,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:16:48,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95220984] [2024-11-23 23:16:48,694 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:16:48,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:16:49,834 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:16:49,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:16:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 392182 backedges. 154780 proven. 1663 refuted. 0 times theorem prover too weak. 235739 trivial. 0 not checked. [2024-11-23 23:16:58,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:16:58,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95220984] [2024-11-23 23:16:58,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95220984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:16:58,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22354882] [2024-11-23 23:16:58,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:16:58,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:16:58,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:16:58,111 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:16:58,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-23 23:16:59,631 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:16:59,631 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:16:59,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 6669 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 23:16:59,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 392182 backedges. 215401 proven. 9526 refuted. 0 times theorem prover too weak. 167255 trivial. 0 not checked. [2024-11-23 23:17:01,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 392182 backedges. 215401 proven. 9526 refuted. 0 times theorem prover too weak. 167255 trivial. 0 not checked. [2024-11-23 23:17:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22354882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:03,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:03,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 85 [2024-11-23 23:17:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864060002] [2024-11-23 23:17:03,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:03,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-23 23:17:03,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:03,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-23 23:17:03,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=6000, Unknown=0, NotChecked=0, Total=7140 [2024-11-23 23:17:03,171 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) [2024-11-23 23:17:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:15,231 INFO L93 Difference]: Finished difference Result 2318 states and 2373 transitions. [2024-11-23 23:17:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2024-11-23 23:17:15,231 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 [2024-11-23 23:17:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:15,237 INFO L225 Difference]: With dead ends: 2318 [2024-11-23 23:17:15,237 INFO L226 Difference]: Without dead ends: 2318 [2024-11-23 23:17:15,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4117 GetRequests, 3848 SyntacticMatches, 16 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17342 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=11064, Invalid=53706, Unknown=0, NotChecked=0, Total=64770 [2024-11-23 23:17:15,240 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9407 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 9432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 9407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:15,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 124 Invalid, 9432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 9407 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-23 23:17:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2024-11-23 23:17:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2126. [2024-11-23 23:17:15,261 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) [2024-11-23 23:17:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 2179 transitions. [2024-11-23 23:17:15,264 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 2179 transitions. Word has length 1956 [2024-11-23 23:17:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:15,265 INFO L471 AbstractCegarLoop]: Abstraction has 2126 states and 2179 transitions. [2024-11-23 23:17:15,265 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) [2024-11-23 23:17:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 2179 transitions. [2024-11-23 23:17:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2013 [2024-11-23 23:17:15,294 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:15,295 INFO L218 NwaCegarLoop]: trace histogram [448, 448, 447, 447, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:17:15,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-23 23:17:15,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-23 23:17:15,495 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)] === [2024-11-23 23:17:15,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1784392983, now seen corresponding path program 21 times [2024-11-23 23:17:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442671232] [2024-11-23 23:17:15,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:17:15,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:15,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-23 23:17:15,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 417270 backedges. 0 proven. 40378 refuted. 0 times theorem prover too weak. 376892 trivial. 0 not checked. [2024-11-23 23:17:17,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442671232] [2024-11-23 23:17:17,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442671232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:17:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79994237] [2024-11-23 23:17:17,593 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:17:17,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:17,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:17,595 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:17:17,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-23 23:17:20,459 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-23 23:17:20,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:20,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-23 23:17:20,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:20,491 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 [2024-11-23 23:17:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 417270 backedges. 0 proven. 40378 refuted. 0 times theorem prover too weak. 376892 trivial. 0 not checked. [2024-11-23 23:17:29,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 417270 backedges. 0 proven. 40378 refuted. 0 times theorem prover too weak. 376892 trivial. 0 not checked. [2024-11-23 23:17:41,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79994237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:41,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:41,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2024-11-23 23:17:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149496290] [2024-11-23 23:17:41,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:41,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-23 23:17:41,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:41,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-23 23:17:41,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1968, Invalid=3884, Unknown=0, NotChecked=0, Total=5852 [2024-11-23 23:17:41,261 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) [2024-11-23 23:17:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:43,106 INFO L93 Difference]: Finished difference Result 3662 states and 3988 transitions. [2024-11-23 23:17:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-23 23:17:43,107 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 [2024-11-23 23:17:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:43,112 INFO L225 Difference]: With dead ends: 3662 [2024-11-23 23:17:43,112 INFO L226 Difference]: Without dead ends: 3662 [2024-11-23 23:17:43,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4080 GetRequests, 3973 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3710, Invalid=8062, Unknown=0, NotChecked=0, Total=11772 [2024-11-23 23:17:43,113 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 337 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:43,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 25 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:17:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2024-11-23 23:17:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 2152. [2024-11-23 23:17:43,138 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) [2024-11-23 23:17:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2208 transitions. [2024-11-23 23:17:43,141 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2208 transitions. Word has length 2012 [2024-11-23 23:17:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:43,143 INFO L471 AbstractCegarLoop]: Abstraction has 2152 states and 2208 transitions. [2024-11-23 23:17:43,143 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) [2024-11-23 23:17:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2208 transitions. [2024-11-23 23:17:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2053 [2024-11-23 23:17:43,173 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:43,174 INFO L218 NwaCegarLoop]: trace histogram [458, 458, 457, 457, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:17:43,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-23 23:17:43,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:43,375 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)] === [2024-11-23 23:17:43,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -777165625, now seen corresponding path program 22 times [2024-11-23 23:17:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:43,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531109991] [2024-11-23 23:17:43,376 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:17:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:44,028 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:17:44,029 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 435670 backedges. 178587 proven. 1870 refuted. 0 times theorem prover too weak. 255213 trivial. 0 not checked. [2024-11-23 23:17:49,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531109991] [2024-11-23 23:17:49,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531109991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:17:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431437456] [2024-11-23 23:17:49,923 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:17:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:49,925 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:17:49,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-23 23:17:51,604 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:17:51,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:51,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 6342 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-23 23:17:51,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 435670 backedges. 249195 proven. 12122 refuted. 0 times theorem prover too weak. 174353 trivial. 0 not checked. [2024-11-23 23:17:53,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 435670 backedges. 249980 proven. 11337 refuted. 0 times theorem prover too weak. 174353 trivial. 0 not checked. [2024-11-23 23:17:55,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431437456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:55,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:55,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 94 [2024-11-23 23:17:55,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323877627] [2024-11-23 23:17:55,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:55,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-23 23:17:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:55,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-23 23:17:55,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=7387, Unknown=0, NotChecked=0, Total=8742 [2024-11-23 23:17:55,709 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) [2024-11-23 23:18:11,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:18:11,059 INFO L93 Difference]: Finished difference Result 2647 states and 2706 transitions. [2024-11-23 23:18:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2024-11-23 23:18:11,059 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 [2024-11-23 23:18:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:18:11,063 INFO L225 Difference]: With dead ends: 2647 [2024-11-23 23:18:11,063 INFO L226 Difference]: Without dead ends: 2647 [2024-11-23 23:18:11,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4331 GetRequests, 4032 SyntacticMatches, 17 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21533 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=14098, Invalid=66274, Unknown=0, NotChecked=0, Total=80372 [2024-11-23 23:18:11,069 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 11390 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 11417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 11390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:18:11,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 139 Invalid, 11417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 11390 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-23 23:18:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2024-11-23 23:18:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2368. [2024-11-23 23:18:11,086 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) [2024-11-23 23:18:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2424 transitions. [2024-11-23 23:18:11,090 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2424 transitions. Word has length 2052 [2024-11-23 23:18:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:18:11,091 INFO L471 AbstractCegarLoop]: Abstraction has 2368 states and 2424 transitions. [2024-11-23 23:18:11,091 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) [2024-11-23 23:18:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2424 transitions. [2024-11-23 23:18:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2105 [2024-11-23 23:18:11,122 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:18:11,123 INFO L218 NwaCegarLoop]: trace histogram [471, 471, 470, 470, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:18:11,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-23 23:18:11,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-23 23:18:11,327 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)] === [2024-11-23 23:18:11,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:18:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash 636088399, now seen corresponding path program 23 times [2024-11-23 23:18:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:18:11,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43082547] [2024-11-23 23:18:11,329 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:18:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:18:15,664 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2024-11-23 23:18:15,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 460188 backedges. 252480 proven. 4475 refuted. 0 times theorem prover too weak. 203233 trivial. 0 not checked. [2024-11-23 23:18:19,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:18:19,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43082547] [2024-11-23 23:18:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43082547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:18:19,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286429114] [2024-11-23 23:18:19,854 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:18:19,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:19,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:18:19,856 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:18:19,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-23 23:18:49,567 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2024-11-23 23:18:49,567 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:49,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 3972 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-23 23:18:49,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:18:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 460188 backedges. 276691 proven. 15508 refuted. 0 times theorem prover too weak. 167989 trivial. 0 not checked. [2024-11-23 23:18:51,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:18:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 460188 backedges. 279934 proven. 12265 refuted. 0 times theorem prover too weak. 167989 trivial. 0 not checked. [2024-11-23 23:18:53,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286429114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:18:53,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:18:53,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 83 [2024-11-23 23:18:53,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916059288] [2024-11-23 23:18:53,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:18:53,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-23 23:18:53,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:18:53,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-23 23:18:53,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1165, Invalid=5641, Unknown=0, NotChecked=0, Total=6806 [2024-11-23 23:18:53,898 INFO L87 Difference]: Start difference. First operand 2368 states and 2424 transitions. Second operand has 83 states, 83 states have (on average 5.108433734939759) internal successors, (424), 83 states have internal predecessors, (424), 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) [2024-11-23 23:19:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:19:06,259 INFO L93 Difference]: Finished difference Result 2929 states and 2988 transitions. [2024-11-23 23:19:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-11-23 23:19:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 5.108433734939759) internal successors, (424), 83 states have internal predecessors, (424), 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 [2024-11-23 23:19:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:19:06,266 INFO L225 Difference]: With dead ends: 2929 [2024-11-23 23:19:06,266 INFO L226 Difference]: Without dead ends: 2929 [2024-11-23 23:19:06,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4437 GetRequests, 4134 SyntacticMatches, 32 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22303 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=14027, Invalid=60229, Unknown=0, NotChecked=0, Total=74256 [2024-11-23 23:19:06,273 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 100 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 8128 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 8145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 8128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:19:06,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 125 Invalid, 8145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 8128 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-23 23:19:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2024-11-23 23:19:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2653. [2024-11-23 23:19:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 1.0214932126696832) internal successors, (2709), 2652 states have internal predecessors, (2709), 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) [2024-11-23 23:19:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 2709 transitions. [2024-11-23 23:19:06,291 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 2709 transitions. Word has length 2104 [2024-11-23 23:19:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:19:06,291 INFO L471 AbstractCegarLoop]: Abstraction has 2653 states and 2709 transitions. [2024-11-23 23:19:06,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 5.108433734939759) internal successors, (424), 83 states have internal predecessors, (424), 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) [2024-11-23 23:19:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 2709 transitions. [2024-11-23 23:19:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2153 [2024-11-23 23:19:06,324 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:19:06,324 INFO L218 NwaCegarLoop]: trace histogram [483, 483, 482, 482, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:19:06,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-23 23:19:06,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-23 23:19:06,525 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)] === [2024-11-23 23:19:06,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:19:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1246334799, now seen corresponding path program 24 times [2024-11-23 23:19:06,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:19:06,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11187411] [2024-11-23 23:19:06,526 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:19:06,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:19:11,005 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2024-11-23 23:19:11,005 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:19:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 483420 backedges. 1789 proven. 105149 refuted. 0 times theorem prover too weak. 376482 trivial. 0 not checked. [2024-11-23 23:19:17,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:19:17,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11187411] [2024-11-23 23:19:17,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11187411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:19:17,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307547871] [2024-11-23 23:19:17,194 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:19:17,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:19:17,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:19:17,196 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:19:17,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-23 23:19:54,190 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2024-11-23 23:19:54,190 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:19:54,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 4011 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-23 23:19:54,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:19:54,258 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 [2024-11-23 23:20:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 483420 backedges. 45575 proven. 61363 refuted. 0 times theorem prover too weak. 376482 trivial. 0 not checked. [2024-11-23 23:20:06,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 483420 backedges. 0 proven. 106938 refuted. 0 times theorem prover too weak. 376482 trivial. 0 not checked. [2024-11-23 23:20:22,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307547871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:22,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:22,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2024-11-23 23:20:22,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531159629] [2024-11-23 23:20:22,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:22,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-23 23:20:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:22,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-23 23:20:22,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2516, Invalid=8196, Unknown=0, NotChecked=0, Total=10712 [2024-11-23 23:20:22,908 INFO L87 Difference]: Start difference. First operand 2653 states and 2709 transitions. Second operand has 104 states, 103 states have (on average 3.883495145631068) internal successors, (400), 104 states have internal predecessors, (400), 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) [2024-11-23 23:20:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:50,173 INFO L93 Difference]: Finished difference Result 10931 states and 11831 transitions. [2024-11-23 23:20:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2024-11-23 23:20:50,174 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 3.883495145631068) internal successors, (400), 104 states have internal predecessors, (400), 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 [2024-11-23 23:20:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:50,194 INFO L225 Difference]: With dead ends: 10931 [2024-11-23 23:20:50,194 INFO L226 Difference]: Without dead ends: 10931 [2024-11-23 23:20:50,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4557 GetRequests, 4235 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33463 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=27685, Invalid=76967, Unknown=0, NotChecked=0, Total=104652 [2024-11-23 23:20:50,199 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 1400 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:20:50,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 30 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 23:20:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2024-11-23 23:20:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 2713. [2024-11-23 23:20:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 1.0265486725663717) internal successors, (2784), 2712 states have internal predecessors, (2784), 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) [2024-11-23 23:20:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 2784 transitions. [2024-11-23 23:20:50,244 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 2784 transitions. Word has length 2152 [2024-11-23 23:20:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:50,245 INFO L471 AbstractCegarLoop]: Abstraction has 2713 states and 2784 transitions. [2024-11-23 23:20:50,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 3.883495145631068) internal successors, (400), 104 states have internal predecessors, (400), 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) [2024-11-23 23:20:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 2784 transitions. [2024-11-23 23:20:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2213 [2024-11-23 23:20:50,269 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:50,269 INFO L218 NwaCegarLoop]: trace histogram [498, 498, 497, 497, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:20:50,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-23 23:20:50,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:50,470 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)] === [2024-11-23 23:20:50,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1935906121, now seen corresponding path program 25 times [2024-11-23 23:20:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:50,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63380447] [2024-11-23 23:20:50,471 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:20:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 513270 backedges. 239515 proven. 2320 refuted. 0 times theorem prover too weak. 271435 trivial. 0 not checked. [2024-11-23 23:21:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63380447] [2024-11-23 23:21:02,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63380447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713333422] [2024-11-23 23:21:02,255 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:21:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:02,257 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:02,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-23 23:21:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:21:04,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 7501 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-23 23:21:04,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 513270 backedges. 321560 proven. 15616 refuted. 0 times theorem prover too weak. 176094 trivial. 0 not checked. [2024-11-23 23:21:06,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 513270 backedges. 321560 proven. 15616 refuted. 0 times theorem prover too weak. 176094 trivial. 0 not checked. [2024-11-23 23:21:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713333422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:09,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 100 [2024-11-23 23:21:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515895476] [2024-11-23 23:21:09,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:09,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-23 23:21:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:09,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-23 23:21:09,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=8349, Unknown=0, NotChecked=0, Total=9900 [2024-11-23 23:21:09,112 INFO L87 Difference]: Start difference. First operand 2713 states and 2784 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) [2024-11-23 23:21:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:21:30,334 INFO L93 Difference]: Finished difference Result 4085 states and 4169 transitions. [2024-11-23 23:21:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2024-11-23 23:21:30,334 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 [2024-11-23 23:21:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:21:30,339 INFO L225 Difference]: With dead ends: 4085 [2024-11-23 23:21:30,339 INFO L226 Difference]: Without dead ends: 4085 [2024-11-23 23:21:30,345 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4698 GetRequests, 4348 SyntacticMatches, 19 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30121 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=18611, Invalid=91945, Unknown=0, NotChecked=0, Total=110556 [2024-11-23 23:21:30,345 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 102 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 15022 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 15056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 15022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:21:30,345 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 151 Invalid, 15056 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 15022 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2024-11-23 23:21:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2024-11-23 23:21:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3113. [2024-11-23 23:21:30,373 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) [2024-11-23 23:21:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 3186 transitions. [2024-11-23 23:21:30,377 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 3186 transitions. Word has length 2212 [2024-11-23 23:21:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:21:30,378 INFO L471 AbstractCegarLoop]: Abstraction has 3113 states and 3186 transitions. [2024-11-23 23:21:30,378 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) [2024-11-23 23:21:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 3186 transitions. [2024-11-23 23:21:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2253 [2024-11-23 23:21:30,399 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:21:30,399 INFO L218 NwaCegarLoop]: trace histogram [508, 508, 507, 507, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:21:30,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-23 23:21:30,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:30,600 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)] === [2024-11-23 23:21:30,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:21:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash -55779017, now seen corresponding path program 26 times [2024-11-23 23:21:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:21:30,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252533807] [2024-11-23 23:21:30,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:30,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:21:31,829 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:31,829 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 533670 backedges. 248432 proven. 2571 refuted. 0 times theorem prover too weak. 282667 trivial. 0 not checked. [2024-11-23 23:21:44,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252533807] [2024-11-23 23:21:44,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252533807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429665629] [2024-11-23 23:21:44,611 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:44,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:44,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:44,615 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:44,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-23 23:21:46,692 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:46,692 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:46,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 7631 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-23 23:21:46,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 533670 backedges. 351667 proven. 18108 refuted. 0 times theorem prover too weak. 163895 trivial. 0 not checked. [2024-11-23 23:21:49,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 533670 backedges. 351667 proven. 18108 refuted. 0 times theorem prover too weak. 163895 trivial. 0 not checked. [2024-11-23 23:21:51,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429665629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:51,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:51,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 86 [2024-11-23 23:21:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001045581] [2024-11-23 23:21:51,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:51,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-23 23:21:51,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:51,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-23 23:21:51,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=6068, Unknown=0, NotChecked=0, Total=7310 [2024-11-23 23:21:51,224 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) [2024-11-23 23:22:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:22:10,924 INFO L93 Difference]: Finished difference Result 4153 states and 4234 transitions. [2024-11-23 23:22:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2024-11-23 23:22:10,924 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 [2024-11-23 23:22:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:22:10,932 INFO L225 Difference]: With dead ends: 4153 [2024-11-23 23:22:10,932 INFO L226 Difference]: Without dead ends: 4153 [2024-11-23 23:22:10,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4800 GetRequests, 4425 SyntacticMatches, 39 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35402 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=19353, Invalid=94553, Unknown=0, NotChecked=0, Total=113906 [2024-11-23 23:22:10,944 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 123 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 14594 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 14621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 14594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:22:10,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 167 Invalid, 14621 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 14594 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-23 23:22:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2024-11-23 23:22:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3598. [2024-11-23 23:22:10,977 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) [2024-11-23 23:22:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 3673 transitions. [2024-11-23 23:22:10,982 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 3673 transitions. Word has length 2252 [2024-11-23 23:22:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:22:10,983 INFO L471 AbstractCegarLoop]: Abstraction has 3598 states and 3673 transitions. [2024-11-23 23:22:10,984 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) [2024-11-23 23:22:10,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 3673 transitions. [2024-11-23 23:22:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2289 [2024-11-23 23:22:11,024 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:22:11,024 INFO L218 NwaCegarLoop]: trace histogram [517, 517, 516, 516, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:22:11,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-23 23:22:11,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-23 23:22:11,225 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)] === [2024-11-23 23:22:11,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:22:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1570662703, now seen corresponding path program 27 times [2024-11-23 23:22:11,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:22:11,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177832992] [2024-11-23 23:22:11,227 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:22:11,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:22:12,762 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-23 23:22:12,762 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 552372 backedges. 103334 proven. 69444 refuted. 0 times theorem prover too weak. 379594 trivial. 0 not checked. [2024-11-23 23:22:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:22:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177832992] [2024-11-23 23:22:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177832992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:22:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30275631] [2024-11-23 23:22:17,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:22:17,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:22:17,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:22:17,307 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:22:17,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-23 23:22:26,961 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-23 23:22:26,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:22:26,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 2857 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-23 23:22:27,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:22:27,016 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 [2024-11-23 23:22:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 552372 backedges. 103334 proven. 69444 refuted. 0 times theorem prover too weak. 379594 trivial. 0 not checked. [2024-11-23 23:22:39,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:22:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 552372 backedges. 0 proven. 172778 refuted. 0 times theorem prover too weak. 379594 trivial. 0 not checked. [2024-11-23 23:22:54,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30275631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:22:54,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:22:54,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 109 [2024-11-23 23:22:54,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228970372] [2024-11-23 23:22:54,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:22:54,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-11-23 23:22:54,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:22:54,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-11-23 23:22:54,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2766, Invalid=9224, Unknown=0, NotChecked=0, Total=11990 [2024-11-23 23:22:54,078 INFO L87 Difference]: Start difference. First operand 3598 states and 3673 transitions. Second operand has 110 states, 109 states have (on average 4.08256880733945) internal successors, (445), 110 states have internal predecessors, (445), 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) [2024-11-23 23:23:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:23:43,746 INFO L93 Difference]: Finished difference Result 15491 states and 16556 transitions. [2024-11-23 23:23:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2024-11-23 23:23:43,746 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 4.08256880733945) internal successors, (445), 110 states have internal predecessors, (445), 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 2288 [2024-11-23 23:23:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:23:43,765 INFO L225 Difference]: With dead ends: 15491 [2024-11-23 23:23:43,765 INFO L226 Difference]: Without dead ends: 15491 [2024-11-23 23:23:43,778 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4925 GetRequests, 4503 SyntacticMatches, 0 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65086 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=46337, Invalid=133015, Unknown=0, NotChecked=0, Total=179352 [2024-11-23 23:23:43,779 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 1457 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:23:43,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1457 Valid, 33 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-23 23:23:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15491 states. [2024-11-23 23:23:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15491 to 3674. [2024-11-23 23:23:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 1.0258644160087123) internal successors, (3768), 3673 states have internal predecessors, (3768), 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) [2024-11-23 23:23:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 3768 transitions. [2024-11-23 23:23:43,871 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 3768 transitions. Word has length 2288 [2024-11-23 23:23:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:23:43,872 INFO L471 AbstractCegarLoop]: Abstraction has 3674 states and 3768 transitions. [2024-11-23 23:23:43,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 4.08256880733945) internal successors, (445), 110 states have internal predecessors, (445), 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) [2024-11-23 23:23:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 3768 transitions. [2024-11-23 23:23:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2365 [2024-11-23 23:23:43,914 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:23:43,914 INFO L218 NwaCegarLoop]: trace histogram [536, 536, 535, 535, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:23:43,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-23 23:23:44,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:23:44,115 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-23 23:23:44,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:23:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -399538921, now seen corresponding path program 28 times [2024-11-23 23:23:44,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:23:44,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894717336] [2024-11-23 23:23:44,117 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:23:44,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:23:45,332 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:23:45,332 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:23:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 592918 backedges. 318759 proven. 2818 refuted. 0 times theorem prover too weak. 271341 trivial. 0 not checked. [2024-11-23 23:23:57,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:23:57,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894717336] [2024-11-23 23:23:57,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894717336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:23:57,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695079233] [2024-11-23 23:23:57,478 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:23:57,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:23:57,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:23:57,480 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:23:57,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-23 23:23:59,794 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:23:59,794 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:23:59,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 7278 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-23 23:23:59,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:24:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 592918 backedges. 399679 proven. 22034 refuted. 0 times theorem prover too weak. 171205 trivial. 0 not checked. [2024-11-23 23:24:02,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:24:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 592918 backedges. 400862 proven. 20851 refuted. 0 times theorem prover too weak. 171205 trivial. 0 not checked. [2024-11-23 23:24:06,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695079233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:24:06,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:24:06,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 115 [2024-11-23 23:24:06,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092913715] [2024-11-23 23:24:06,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:24:06,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-11-23 23:24:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:24:06,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-11-23 23:24:06,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2025, Invalid=11085, Unknown=0, NotChecked=0, Total=13110 [2024-11-23 23:24:06,072 INFO L87 Difference]: Start difference. First operand 3674 states and 3768 transitions. Second operand has 115 states, 115 states have (on average 5.208695652173913) internal successors, (599), 115 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) [2024-11-23 23:24:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:24:31,903 INFO L93 Difference]: Finished difference Result 4920 states and 5022 transitions. [2024-11-23 23:24:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 298 states. [2024-11-23 23:24:31,904 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 5.208695652173913) internal successors, (599), 115 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) Word has length 2364 [2024-11-23 23:24:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:24:31,909 INFO L225 Difference]: With dead ends: 4920 [2024-11-23 23:24:31,909 INFO L226 Difference]: Without dead ends: 4920 [2024-11-23 23:24:31,921 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5048 GetRequests, 4640 SyntacticMatches, 21 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40968 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=26208, Invalid=124724, Unknown=0, NotChecked=0, Total=150932 [2024-11-23 23:24:31,921 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 131 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 15634 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 15676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 15634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:24:31,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 167 Invalid, 15676 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [42 Valid, 15634 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-23 23:24:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2024-11-23 23:24:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 4258. [2024-11-23 23:24:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4258 states, 4257 states have (on average 1.0225510923185341) internal successors, (4353), 4257 states have internal predecessors, (4353), 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) [2024-11-23 23:24:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4258 states to 4258 states and 4353 transitions. [2024-11-23 23:24:31,965 INFO L78 Accepts]: Start accepts. Automaton has 4258 states and 4353 transitions. Word has length 2364 [2024-11-23 23:24:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:24:31,966 INFO L471 AbstractCegarLoop]: Abstraction has 4258 states and 4353 transitions. [2024-11-23 23:24:31,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 5.208695652173913) internal successors, (599), 115 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) [2024-11-23 23:24:31,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4258 states and 4353 transitions. [2024-11-23 23:24:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2389 [2024-11-23 23:24:32,010 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:24:32,011 INFO L218 NwaCegarLoop]: trace histogram [542, 542, 541, 541, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-23 23:24:32,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-23 23:24:32,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:24:32,213 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-23 23:24:32,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:24:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1641227625, now seen corresponding path program 29 times [2024-11-23 23:24:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:24:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367215207] [2024-11-23 23:24:32,214 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:24:32,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:24:40,013 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2024-11-23 23:24:40,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:24:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 606022 backedges. 346137 proven. 3012 refuted. 0 times theorem prover too weak. 256873 trivial. 0 not checked. [2024-11-23 23:24:51,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:24:51,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367215207] [2024-11-23 23:24:51,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367215207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:24:51,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782716136] [2024-11-23 23:24:51,697 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:24:51,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:24:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:24:51,699 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:24:51,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eebc29f-feb5-431f-8a9a-969b7b9a13cf/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process