./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:38:14,273 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:38:14,375 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:38:14,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:38:14,386 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:38:14,427 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:38:14,428 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:38:14,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:38:14,429 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:38:14,430 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:38:14,431 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:38:14,431 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:38:14,431 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:38:14,431 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:38:14,432 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:38:14,433 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:38:14,433 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:38:14,434 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:38:14,434 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:38:14,434 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:38:14,434 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:38:14,434 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:38:14,435 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:38:14,435 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:38:14,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:38:14,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:38:14,435 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:38:14,435 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:38:14,435 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:38:14,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:38:14,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:38:14,436 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:38:14,436 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:38:14,436 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:38:14,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:38:14,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:38:14,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:38:14,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:38:14,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:38:14,437 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_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2024-11-28 03:38:14,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:38:14,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:38:14,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:38:14,805 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:38:14,805 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:38:14,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2024-11-28 03:38:17,923 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/data/4534e0863/5b8b89715d1646b48e6530682b9742fe/FLAG07ddab8fc [2024-11-28 03:38:18,286 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:38:18,287 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2024-11-28 03:38:18,310 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/data/4534e0863/5b8b89715d1646b48e6530682b9742fe/FLAG07ddab8fc [2024-11-28 03:38:18,338 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/data/4534e0863/5b8b89715d1646b48e6530682b9742fe [2024-11-28 03:38:18,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:38:18,343 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:38:18,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:38:18,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:38:18,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:38:18,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:18,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a229a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18, skipping insertion in model container [2024-11-28 03:38:18,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:18,404 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:38:18,852 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:38:18,854 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:38:18,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:38:18,877 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:38:18,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:38:18,958 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:38:18,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18 WrapperNode [2024-11-28 03:38:18,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:38:18,960 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:38:18,960 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:38:18,960 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:38:18,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:18,979 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,003 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2024-11-28 03:38:19,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:38:19,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:38:19,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:38:19,008 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:38:19,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,037 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-28 03:38:19,037 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,037 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,044 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,045 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,050 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:38:19,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:38:19,054 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:38:19,054 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:38:19,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (1/1) ... [2024-11-28 03:38:19,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:38:19,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:19,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:38:19,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:38:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:38:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:38:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:38:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:38:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:38:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:38:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:38:19,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:38:19,290 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:38:19,293 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:38:19,654 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-28 03:38:19,654 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:38:19,671 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:38:19,672 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:38:19,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:38:19 BoogieIcfgContainer [2024-11-28 03:38:19,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:38:19,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:38:19,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:38:19,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:38:19,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:38:18" (1/3) ... [2024-11-28 03:38:19,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f63d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:38:19, skipping insertion in model container [2024-11-28 03:38:19,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:38:18" (2/3) ... [2024-11-28 03:38:19,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f63d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:38:19, skipping insertion in model container [2024-11-28 03:38:19,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:38:19" (3/3) ... [2024-11-28 03:38:19,690 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2024-11-28 03:38:19,710 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:38:19,714 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrcspn-alloca-2.i that has 1 procedures, 43 locations, 1 initial locations, 4 loop locations, and 13 error locations. [2024-11-28 03:38:19,777 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:38:19,797 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;@4b5b25c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:38:19,798 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-28 03:38:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.793103448275862) internal successors, (52), 42 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) [2024-11-28 03:38:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:38:19,812 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:19,813 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:19,813 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:19,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-11-28 03:38:19,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:19,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610549160] [2024-11-28 03:38:19,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:19,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610549160] [2024-11-28 03:38:20,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610549160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:20,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:20,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:38:20,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7752898] [2024-11-28 03:38:20,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:20,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:38:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:20,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:38:20,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:20,288 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.793103448275862) internal successors, (52), 42 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) 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) [2024-11-28 03:38:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:20,411 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-11-28 03:38:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:38:20,414 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 [2024-11-28 03:38:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:20,421 INFO L225 Difference]: With dead ends: 56 [2024-11-28 03:38:20,421 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 03:38:20,424 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:20,427 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:20,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 118 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 03:38:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2024-11-28 03:38:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2024-11-28 03:38:20,470 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 8 [2024-11-28 03:38:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:20,470 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2024-11-28 03:38:20,470 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) [2024-11-28 03:38:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2024-11-28 03:38:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:38:20,471 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:20,471 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:20,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:38:20,472 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:20,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash 178583535, now seen corresponding path program 1 times [2024-11-28 03:38:20,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144060130] [2024-11-28 03:38:20,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:20,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:21,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144060130] [2024-11-28 03:38:21,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144060130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:21,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:21,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:38:21,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750121379] [2024-11-28 03:38:21,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:21,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:38:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:21,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:38:21,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:21,117 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2024-11-28 03:38:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:21,283 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-11-28 03:38:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:38:21,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2024-11-28 03:38:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:21,287 INFO L225 Difference]: With dead ends: 62 [2024-11-28 03:38:21,287 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 03:38:21,288 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 [2024-11-28 03:38:21,289 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:21,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 73 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 03:38:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2024-11-28 03:38:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 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) [2024-11-28 03:38:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-28 03:38:21,296 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 8 [2024-11-28 03:38:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:21,296 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-28 03:38:21,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2024-11-28 03:38:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-28 03:38:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:38:21,297 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:21,297 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:21,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:38:21,298 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:21,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:21,299 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-11-28 03:38:21,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:21,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114038459] [2024-11-28 03:38:21,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:21,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:21,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:21,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114038459] [2024-11-28 03:38:21,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114038459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:21,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:21,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:38:21,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004346854] [2024-11-28 03:38:21,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:21,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:38:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:21,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:38:21,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:21,696 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2024-11-28 03:38:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:21,813 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-11-28 03:38:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:38:21,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2024-11-28 03:38:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:21,815 INFO L225 Difference]: With dead ends: 46 [2024-11-28 03:38:21,815 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 03:38:21,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:38:21,816 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:21,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 03:38:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-28 03:38:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.5294117647058822) 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) [2024-11-28 03:38:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-28 03:38:21,822 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 8 [2024-11-28 03:38:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:21,822 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-28 03:38:21,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2024-11-28 03:38:21,822 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-28 03:38:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:38:21,823 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:21,823 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:21,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:38:21,824 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:21,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash 631530201, now seen corresponding path program 1 times [2024-11-28 03:38:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:21,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3280928] [2024-11-28 03:38:21,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:21,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:21,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3280928] [2024-11-28 03:38:21,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3280928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:21,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:21,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:38:21,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422765677] [2024-11-28 03:38:21,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:21,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:38:21,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:21,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:38:21,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:21,904 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:21,952 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2024-11-28 03:38:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:38:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 03:38:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:21,955 INFO L225 Difference]: With dead ends: 63 [2024-11-28 03:38:21,955 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 03:38:21,956 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:21,957 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 107 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 [2024-11-28 03:38:21,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 107 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:38:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 03:38:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2024-11-28 03:38:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 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) [2024-11-28 03:38:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-11-28 03:38:21,968 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 10 [2024-11-28 03:38:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:21,968 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-11-28 03:38:21,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-11-28 03:38:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:38:21,969 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:21,969 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:21,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:38:21,969 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:21,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 631532380, now seen corresponding path program 1 times [2024-11-28 03:38:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:21,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982062619] [2024-11-28 03:38:21,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:21,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:22,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:22,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982062619] [2024-11-28 03:38:22,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982062619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:22,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:22,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:38:22,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879514745] [2024-11-28 03:38:22,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:22,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:38:22,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:22,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:38:22,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:22,224 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:22,312 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-11-28 03:38:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:38:22,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 03:38:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:22,315 INFO L225 Difference]: With dead ends: 68 [2024-11-28 03:38:22,315 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 03:38:22,315 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 [2024-11-28 03:38:22,316 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:22,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 03:38:22,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-11-28 03:38:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 65 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) [2024-11-28 03:38:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-11-28 03:38:22,328 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 10 [2024-11-28 03:38:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:22,328 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-11-28 03:38:22,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-11-28 03:38:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:38:22,332 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:22,332 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:22,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:38:22,333 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:22,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:22,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1888429733, now seen corresponding path program 1 times [2024-11-28 03:38:22,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:22,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274976376] [2024-11-28 03:38:22,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:22,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:22,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:22,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274976376] [2024-11-28 03:38:22,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274976376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:22,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:22,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:38:22,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014702924] [2024-11-28 03:38:22,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:22,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:38:22,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:22,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:38:22,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:22,600 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:22,703 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2024-11-28 03:38:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:38:22,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2024-11-28 03:38:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:22,705 INFO L225 Difference]: With dead ends: 65 [2024-11-28 03:38:22,705 INFO L226 Difference]: Without dead ends: 65 [2024-11-28 03:38:22,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:22,706 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:22,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 96 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-28 03:38:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2024-11-28 03:38:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2024-11-28 03:38:22,719 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 10 [2024-11-28 03:38:22,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:22,719 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2024-11-28 03:38:22,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2024-11-28 03:38:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:38:22,720 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:22,720 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:22,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:38:22,720 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:22,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:22,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1888429732, now seen corresponding path program 1 times [2024-11-28 03:38:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208094518] [2024-11-28 03:38:22,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:22,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208094518] [2024-11-28 03:38:22,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208094518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:22,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:22,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:38:22,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143045708] [2024-11-28 03:38:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:22,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:38:22,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:22,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:38:22,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:38:22,974 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:23,110 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2024-11-28 03:38:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:38:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2024-11-28 03:38:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:23,112 INFO L225 Difference]: With dead ends: 72 [2024-11-28 03:38:23,114 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 03:38:23,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:38:23,115 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:23,116 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 86 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 03:38:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-11-28 03:38:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2024-11-28 03:38:23,127 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 10 [2024-11-28 03:38:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:23,127 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2024-11-28 03:38:23,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2024-11-28 03:38:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:38:23,128 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:23,128 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:23,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:38:23,128 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:23,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash -177814246, now seen corresponding path program 1 times [2024-11-28 03:38:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008471911] [2024-11-28 03:38:23,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:23,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:23,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008471911] [2024-11-28 03:38:23,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008471911] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:23,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:23,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:38:23,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507227226] [2024-11-28 03:38:23,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:23,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:38:23,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:23,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:38:23,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:23,383 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:23,467 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2024-11-28 03:38:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:38:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2024-11-28 03:38:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:23,474 INFO L225 Difference]: With dead ends: 85 [2024-11-28 03:38:23,475 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 03:38:23,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:23,477 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 27 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:23,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 83 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 03:38:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2024-11-28 03:38:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2024-11-28 03:38:23,488 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 10 [2024-11-28 03:38:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:23,489 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2024-11-28 03:38:23,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2024-11-28 03:38:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 03:38:23,494 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:23,494 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:23,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:38:23,494 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:23,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1897332705, now seen corresponding path program 1 times [2024-11-28 03:38:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:23,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642810385] [2024-11-28 03:38:23,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:23,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:23,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:23,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642810385] [2024-11-28 03:38:23,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642810385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:23,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:23,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:38:23,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761267611] [2024-11-28 03:38:23,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:23,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:38:23,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:23,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:38:23,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:23,667 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:23,702 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2024-11-28 03:38:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:38:23,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2024-11-28 03:38:23,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:23,703 INFO L225 Difference]: With dead ends: 77 [2024-11-28 03:38:23,704 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 03:38:23,704 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 [2024-11-28 03:38:23,705 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:23,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:38:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 03:38:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-11-28 03:38:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 74 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) [2024-11-28 03:38:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2024-11-28 03:38:23,710 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 11 [2024-11-28 03:38:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:23,711 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2024-11-28 03:38:23,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2024-11-28 03:38:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 03:38:23,711 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:23,712 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:23,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:38:23,712 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:23,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1588287965, now seen corresponding path program 1 times [2024-11-28 03:38:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:23,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855186176] [2024-11-28 03:38:23,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:23,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:23,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855186176] [2024-11-28 03:38:23,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855186176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:23,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:23,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:38:23,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978660974] [2024-11-28 03:38:23,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:23,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:38:23,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:23,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:38:23,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:23,886 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:23,923 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2024-11-28 03:38:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:38:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2024-11-28 03:38:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:23,924 INFO L225 Difference]: With dead ends: 74 [2024-11-28 03:38:23,924 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 03:38:23,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:23,925 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:23,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 67 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:38:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 03:38:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2024-11-28 03:38:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.360655737704918) internal successors, (83), 68 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) [2024-11-28 03:38:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2024-11-28 03:38:23,930 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 11 [2024-11-28 03:38:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:23,930 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2024-11-28 03:38:23,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2024-11-28 03:38:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:38:23,931 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:23,931 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:23,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 03:38:23,935 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:23,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-11-28 03:38:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:23,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120396147] [2024-11-28 03:38:23,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:24,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:24,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120396147] [2024-11-28 03:38:24,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120396147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:24,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136117708] [2024-11-28 03:38:24,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:24,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:24,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:24,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:24,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:38:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:24,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:38:24,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:24,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:38:24,531 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 7 [2024-11-28 03:38:24,548 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 [2024-11-28 03:38:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:24,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:25,235 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:38:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136117708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:25,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:25,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-28 03:38:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939429916] [2024-11-28 03:38:25,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:25,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:38:25,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:25,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:38:25,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:38:25,307 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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) [2024-11-28 03:38:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:25,596 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2024-11-28 03:38:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:38:25,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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) Word has length 12 [2024-11-28 03:38:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:25,597 INFO L225 Difference]: With dead ends: 72 [2024-11-28 03:38:25,598 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 03:38:25,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:38:25,599 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:25,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 154 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 03:38:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2024-11-28 03:38:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2024-11-28 03:38:25,603 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 12 [2024-11-28 03:38:25,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:25,603 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2024-11-28 03:38:25,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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) [2024-11-28 03:38:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2024-11-28 03:38:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:38:25,604 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:25,604 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:25,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:38:25,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:25,809 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:25,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:25,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1669001153, now seen corresponding path program 1 times [2024-11-28 03:38:25,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:25,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572399819] [2024-11-28 03:38:25,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:25,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:25,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:25,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572399819] [2024-11-28 03:38:25,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572399819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:25,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:25,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:38:25,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589560367] [2024-11-28 03:38:25,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:25,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:38:25,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:25,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:38:25,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:38:25,894 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:25,958 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-11-28 03:38:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:38:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2024-11-28 03:38:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:25,959 INFO L225 Difference]: With dead ends: 63 [2024-11-28 03:38:25,959 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 03:38:25,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:38:25,959 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:25,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 03:38:25,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-28 03:38:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-11-28 03:38:25,963 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 14 [2024-11-28 03:38:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:25,963 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-11-28 03:38:25,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:25,964 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-11-28 03:38:25,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:38:25,964 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:25,964 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:25,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:38:25,965 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:25,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1669001152, now seen corresponding path program 1 times [2024-11-28 03:38:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:25,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824807502] [2024-11-28 03:38:25,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:26,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:26,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824807502] [2024-11-28 03:38:26,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824807502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:26,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:26,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:38:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203793064] [2024-11-28 03:38:26,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:26,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:38:26,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:26,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:38:26,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:38:26,171 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:26,268 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2024-11-28 03:38:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:38:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2024-11-28 03:38:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:26,270 INFO L225 Difference]: With dead ends: 70 [2024-11-28 03:38:26,270 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 03:38:26,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:38:26,271 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:26,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 132 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 03:38:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-11-28 03:38:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-11-28 03:38:26,275 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 14 [2024-11-28 03:38:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:26,275 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-11-28 03:38:26,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-11-28 03:38:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:38:26,275 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:26,276 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:26,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:38:26,276 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:26,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1315344789, now seen corresponding path program 1 times [2024-11-28 03:38:26,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:26,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055212480] [2024-11-28 03:38:26,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:26,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055212480] [2024-11-28 03:38:26,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055212480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293404312] [2024-11-28 03:38:26,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:26,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:26,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:26,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:38:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:26,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:38:26,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:26,829 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 7 [2024-11-28 03:38:26,840 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 8 treesize of output 1 [2024-11-28 03:38:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:27,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:27,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293404312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:27,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:27,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-28 03:38:27,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051328963] [2024-11-28 03:38:27,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:27,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:38:27,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:27,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:38:27,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:38:27,628 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:28,056 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2024-11-28 03:38:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:38:28,057 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 14 [2024-11-28 03:38:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:28,059 INFO L225 Difference]: With dead ends: 74 [2024-11-28 03:38:28,059 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 03:38:28,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:38:28,061 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:28,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 136 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:38:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 03:38:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2024-11-28 03:38:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-11-28 03:38:28,065 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 14 [2024-11-28 03:38:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:28,066 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-11-28 03:38:28,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-11-28 03:38:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:38:28,067 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:28,067 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:28,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:38:28,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:28,272 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:28,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash 61543571, now seen corresponding path program 1 times [2024-11-28 03:38:28,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:28,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139333481] [2024-11-28 03:38:28,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:28,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:28,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:28,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139333481] [2024-11-28 03:38:28,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139333481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:28,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:28,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:38:28,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108333727] [2024-11-28 03:38:28,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:28,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:38:28,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:28,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:38:28,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:38:28,560 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:28,617 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-11-28 03:38:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:38:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2024-11-28 03:38:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:28,618 INFO L225 Difference]: With dead ends: 57 [2024-11-28 03:38:28,618 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 03:38:28,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:38:28,619 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:28,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 03:38:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2024-11-28 03:38:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 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) [2024-11-28 03:38:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2024-11-28 03:38:28,622 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 14 [2024-11-28 03:38:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:28,622 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2024-11-28 03:38:28,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2024-11-28 03:38:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 03:38:28,623 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:28,623 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:28,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:38:28,624 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:28,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1623072646, now seen corresponding path program 1 times [2024-11-28 03:38:28,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:28,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356087198] [2024-11-28 03:38:28,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:28,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:28,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356087198] [2024-11-28 03:38:28,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356087198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:28,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:28,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:38:28,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322038660] [2024-11-28 03:38:28,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:28,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:38:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:28,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:38:28,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:38:28,703 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:28,781 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-11-28 03:38:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:38:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2024-11-28 03:38:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:28,782 INFO L225 Difference]: With dead ends: 46 [2024-11-28 03:38:28,782 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 03:38:28,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:38:28,783 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:28,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 87 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 03:38:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-28 03:38:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) 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) [2024-11-28 03:38:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-28 03:38:28,786 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2024-11-28 03:38:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:28,786 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-28 03:38:28,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-28 03:38:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 03:38:28,787 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:28,787 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:28,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:38:28,788 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:28,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1623072647, now seen corresponding path program 1 times [2024-11-28 03:38:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:28,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150174053] [2024-11-28 03:38:28,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:29,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:29,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150174053] [2024-11-28 03:38:29,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150174053] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:29,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:29,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:38:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078707111] [2024-11-28 03:38:29,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:29,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:38:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:29,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:38:29,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:38:29,032 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:29,184 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-11-28 03:38:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:38:29,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2024-11-28 03:38:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:29,185 INFO L225 Difference]: With dead ends: 53 [2024-11-28 03:38:29,185 INFO L226 Difference]: Without dead ends: 53 [2024-11-28 03:38:29,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:38:29,186 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:29,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 118 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-28 03:38:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2024-11-28 03:38:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-11-28 03:38:29,188 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 17 [2024-11-28 03:38:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:29,192 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-11-28 03:38:29,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-11-28 03:38:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 03:38:29,193 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:29,193 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:29,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 03:38:29,196 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:29,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1911839478, now seen corresponding path program 1 times [2024-11-28 03:38:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844377692] [2024-11-28 03:38:29,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:29,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:29,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844377692] [2024-11-28 03:38:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844377692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:29,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:29,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:38:29,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76677949] [2024-11-28 03:38:29,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:29,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:38:29,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:29,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:38:29,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:29,386 INFO L87 Difference]: Start difference. First operand 47 states and 54 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) [2024-11-28 03:38:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:29,410 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-11-28 03:38:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:38:29,411 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 21 [2024-11-28 03:38:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:29,411 INFO L225 Difference]: With dead ends: 46 [2024-11-28 03:38:29,411 INFO L226 Difference]: Without dead ends: 44 [2024-11-28 03:38:29,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:38:29,412 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:29,412 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:38:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-28 03:38:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-28 03:38:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-11-28 03:38:29,416 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 21 [2024-11-28 03:38:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:29,416 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-11-28 03:38:29,416 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) [2024-11-28 03:38:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-11-28 03:38:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:38:29,417 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:29,417 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:29,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 03:38:29,417 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:29,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:29,418 INFO L85 PathProgramCache]: Analyzing trace with hash 862567627, now seen corresponding path program 1 times [2024-11-28 03:38:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:29,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407160719] [2024-11-28 03:38:29,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:29,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407160719] [2024-11-28 03:38:29,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407160719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:29,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:29,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 03:38:29,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043206279] [2024-11-28 03:38:29,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:29,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:38:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:29,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:38:29,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:38:29,645 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2024-11-28 03:38:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:29,773 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2024-11-28 03:38:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:38:29,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 22 [2024-11-28 03:38:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:29,774 INFO L225 Difference]: With dead ends: 59 [2024-11-28 03:38:29,774 INFO L226 Difference]: Without dead ends: 59 [2024-11-28 03:38:29,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:38:29,775 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:29,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 195 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-28 03:38:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-28 03:38:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2024-11-28 03:38:29,777 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 22 [2024-11-28 03:38:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:29,777 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2024-11-28 03:38:29,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2024-11-28 03:38:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2024-11-28 03:38:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:38:29,778 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:29,778 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:29,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 03:38:29,779 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:29,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:29,779 INFO L85 PathProgramCache]: Analyzing trace with hash 862569293, now seen corresponding path program 1 times [2024-11-28 03:38:29,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:29,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499055642] [2024-11-28 03:38:29,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:29,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:29,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499055642] [2024-11-28 03:38:29,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499055642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:29,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:29,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 03:38:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198784219] [2024-11-28 03:38:29,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:29,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:38:29,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:29,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:38:29,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:38:29,995 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2024-11-28 03:38:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:30,068 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2024-11-28 03:38:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:38:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 22 [2024-11-28 03:38:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:30,069 INFO L225 Difference]: With dead ends: 92 [2024-11-28 03:38:30,069 INFO L226 Difference]: Without dead ends: 76 [2024-11-28 03:38:30,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:38:30,070 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:30,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 184 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-28 03:38:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-11-28 03:38:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-11-28 03:38:30,073 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 22 [2024-11-28 03:38:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:30,074 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-11-28 03:38:30,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2024-11-28 03:38:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-11-28 03:38:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:38:30,074 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:30,075 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:30,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 03:38:30,075 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:30,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:30,075 INFO L85 PathProgramCache]: Analyzing trace with hash -826376115, now seen corresponding path program 1 times [2024-11-28 03:38:30,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:30,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757802757] [2024-11-28 03:38:30,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:30,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:30,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757802757] [2024-11-28 03:38:30,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757802757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:30,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:30,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 03:38:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017617586] [2024-11-28 03:38:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:30,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:38:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:30,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:38:30,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:38:30,341 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2024-11-28 03:38:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:30,471 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2024-11-28 03:38:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:38:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 22 [2024-11-28 03:38:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:30,472 INFO L225 Difference]: With dead ends: 110 [2024-11-28 03:38:30,472 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 03:38:30,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:38:30,473 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:30,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 173 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 03:38:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 77. [2024-11-28 03:38:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.16) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2024-11-28 03:38:30,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 22 [2024-11-28 03:38:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:30,476 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2024-11-28 03:38:30,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2024-11-28 03:38:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2024-11-28 03:38:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:38:30,477 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:30,477 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:30,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 03:38:30,477 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:30,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:30,478 INFO L85 PathProgramCache]: Analyzing trace with hash 44920843, now seen corresponding path program 1 times [2024-11-28 03:38:30,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:30,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295766916] [2024-11-28 03:38:30,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:30,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:30,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:30,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295766916] [2024-11-28 03:38:30,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295766916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:38:30,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:38:30,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 03:38:30,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162025697] [2024-11-28 03:38:30,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:38:30,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:38:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:30,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:38:30,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:38:30,747 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2024-11-28 03:38:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:30,849 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2024-11-28 03:38:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:38:30,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 22 [2024-11-28 03:38:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:30,850 INFO L225 Difference]: With dead ends: 120 [2024-11-28 03:38:30,854 INFO L226 Difference]: Without dead ends: 106 [2024-11-28 03:38:30,854 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:38:30,856 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:30,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 179 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-28 03:38:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2024-11-28 03:38:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 78 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) [2024-11-28 03:38:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2024-11-28 03:38:30,863 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 22 [2024-11-28 03:38:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:30,863 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2024-11-28 03:38:30,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2024-11-28 03:38:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2024-11-28 03:38:30,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 03:38:30,864 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:30,864 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:30,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 03:38:30,864 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:30,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash 235711238, now seen corresponding path program 1 times [2024-11-28 03:38:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:30,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045381067] [2024-11-28 03:38:30,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:30,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:31,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045381067] [2024-11-28 03:38:31,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045381067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772199924] [2024-11-28 03:38:31,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:31,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:31,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:31,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:38:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:31,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:38:31,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:31,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:31,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:38:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:31,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772199924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:31,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:31,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-11-28 03:38:31,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055936966] [2024-11-28 03:38:31,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:31,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:38:31,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:31,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:38:31,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:38:31,740 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:32,045 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2024-11-28 03:38:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:38:32,046 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 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 26 [2024-11-28 03:38:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:32,047 INFO L225 Difference]: With dead ends: 100 [2024-11-28 03:38:32,047 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 03:38:32,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:38:32,049 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:32,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 272 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:38:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 03:38:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2024-11-28 03:38:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.160919540229885) internal successors, (101), 88 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2024-11-28 03:38:32,053 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 26 [2024-11-28 03:38:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:32,054 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2024-11-28 03:38:32,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2024-11-28 03:38:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 03:38:32,055 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:32,056 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:32,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:38:32,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:32,256 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:32,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash -169782780, now seen corresponding path program 1 times [2024-11-28 03:38:32,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:32,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570928215] [2024-11-28 03:38:32,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:32,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:32,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570928215] [2024-11-28 03:38:32,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570928215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897962094] [2024-11-28 03:38:32,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:38:32,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:32,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:32,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:38:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:38:32,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:38:32,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:32,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:32,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:38:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:32,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897962094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:32,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:32,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-28 03:38:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073295889] [2024-11-28 03:38:32,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:32,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:38:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:32,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:38:32,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:38:32,999 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 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) [2024-11-28 03:38:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:33,202 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2024-11-28 03:38:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:38:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 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) Word has length 26 [2024-11-28 03:38:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:33,203 INFO L225 Difference]: With dead ends: 119 [2024-11-28 03:38:33,203 INFO L226 Difference]: Without dead ends: 119 [2024-11-28 03:38:33,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:38:33,204 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:33,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 299 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:38:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-28 03:38:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2024-11-28 03:38:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 111 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-11-28 03:38:33,208 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 26 [2024-11-28 03:38:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:33,208 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-11-28 03:38:33,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 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) [2024-11-28 03:38:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-11-28 03:38:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 03:38:33,209 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:33,209 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:33,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:38:33,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:38:33,410 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:33,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:33,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1322153812, now seen corresponding path program 2 times [2024-11-28 03:38:33,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:33,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374972431] [2024-11-28 03:38:33,411 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:38:33,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:33,436 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:38:33,436 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374972431] [2024-11-28 03:38:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374972431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081241631] [2024-11-28 03:38:34,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:38:34,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:34,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:34,124 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:34,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:38:34,226 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:38:34,226 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:34,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 03:38:34,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:34,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:38:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:34,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:34,598 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 13 [2024-11-28 03:38:34,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:38:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:34,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081241631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:34,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:34,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2024-11-28 03:38:34,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257084780] [2024-11-28 03:38:34,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:34,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:38:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:34,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:38:34,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:38:34,704 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:35,778 INFO L93 Difference]: Finished difference Result 204 states and 223 transitions. [2024-11-28 03:38:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:38:35,779 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2024-11-28 03:38:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:35,780 INFO L225 Difference]: With dead ends: 204 [2024-11-28 03:38:35,780 INFO L226 Difference]: Without dead ends: 187 [2024-11-28 03:38:35,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=2238, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:38:35,782 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:35,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 427 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:38:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-28 03:38:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 167. [2024-11-28 03:38:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 165 states have (on average 1.1393939393939394) internal successors, (188), 166 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 188 transitions. [2024-11-28 03:38:35,791 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 188 transitions. Word has length 31 [2024-11-28 03:38:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:35,791 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 188 transitions. [2024-11-28 03:38:35,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 188 transitions. [2024-11-28 03:38:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 03:38:35,792 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:35,792 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:35,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:38:35,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:38:35,996 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:35,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1431961873, now seen corresponding path program 2 times [2024-11-28 03:38:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:35,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645644886] [2024-11-28 03:38:35,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:38:35,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:36,029 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:38:36,032 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:36,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:36,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645644886] [2024-11-28 03:38:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645644886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:36,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185725980] [2024-11-28 03:38:36,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:38:36,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:36,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:36,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:36,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:38:36,565 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:38:36,566 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:36,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 03:38:36,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:36,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:38:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:36,747 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:36,793 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 13 [2024-11-28 03:38:36,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:38:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:36,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185725980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:36,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:36,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 22 [2024-11-28 03:38:36,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519276696] [2024-11-28 03:38:36,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:36,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:38:36,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:36,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:38:36,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:38:36,876 INFO L87 Difference]: Start difference. First operand 167 states and 188 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2024-11-28 03:38:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:37,059 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2024-11-28 03:38:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:38:37,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) Word has length 34 [2024-11-28 03:38:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:37,061 INFO L225 Difference]: With dead ends: 289 [2024-11-28 03:38:37,061 INFO L226 Difference]: Without dead ends: 237 [2024-11-28 03:38:37,062 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:38:37,063 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 32 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:37,063 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 357 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:38:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-28 03:38:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 209. [2024-11-28 03:38:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2024-11-28 03:38:37,077 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 34 [2024-11-28 03:38:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:37,077 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2024-11-28 03:38:37,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 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) [2024-11-28 03:38:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2024-11-28 03:38:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:38:37,078 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:37,078 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:37,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:38:37,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:37,279 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:37,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash 976598410, now seen corresponding path program 3 times [2024-11-28 03:38:37,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:37,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400179886] [2024-11-28 03:38:37,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:38:37,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:37,301 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:38:37,301 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:37,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:37,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400179886] [2024-11-28 03:38:37,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400179886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:37,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739716746] [2024-11-28 03:38:37,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:38:37,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:37,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:37,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:38:37,874 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:38:37,874 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:37,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 03:38:37,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:38,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:38,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 03:38:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739716746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:38,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:38,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-11-28 03:38:38,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047694157] [2024-11-28 03:38:38,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:38,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:38:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:38,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:38:38,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:38:38,441 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 25 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:38,858 INFO L93 Difference]: Finished difference Result 252 states and 282 transitions. [2024-11-28 03:38:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:38:38,859 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 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 38 [2024-11-28 03:38:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:38,860 INFO L225 Difference]: With dead ends: 252 [2024-11-28 03:38:38,860 INFO L226 Difference]: Without dead ends: 252 [2024-11-28 03:38:38,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:38:38,861 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:38,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 636 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:38:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-28 03:38:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2024-11-28 03:38:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 248 states have (on average 1.1370967741935485) internal successors, (282), 249 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 282 transitions. [2024-11-28 03:38:38,871 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 282 transitions. Word has length 38 [2024-11-28 03:38:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:38,871 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 282 transitions. [2024-11-28 03:38:38,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 282 transitions. [2024-11-28 03:38:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 03:38:38,872 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:38,872 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:38,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:38:39,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:39,076 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:39,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -325077569, now seen corresponding path program 3 times [2024-11-28 03:38:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:39,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150098450] [2024-11-28 03:38:39,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:38:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:39,116 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:38:39,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:39,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:39,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150098450] [2024-11-28 03:38:39,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150098450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:39,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833349464] [2024-11-28 03:38:39,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:38:39,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:39,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:39,568 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:39,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:38:39,681 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:38:39,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:39,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-28 03:38:39,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:39,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:38:39,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:38:40,172 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:38:40,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:38:40,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-28 03:38:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:40,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:40,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-28 03:38:40,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-28 03:38:41,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 03:38:41,051 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 20 [2024-11-28 03:38:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:41,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833349464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:41,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:41,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2024-11-28 03:38:41,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80740397] [2024-11-28 03:38:41,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:41,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 03:38:41,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:41,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 03:38:41,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2593, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 03:38:41,703 INFO L87 Difference]: Start difference. First operand 250 states and 282 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:43,787 INFO L93 Difference]: Finished difference Result 440 states and 483 transitions. [2024-11-28 03:38:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 03:38:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 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 40 [2024-11-28 03:38:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:43,789 INFO L225 Difference]: With dead ends: 440 [2024-11-28 03:38:43,789 INFO L226 Difference]: Without dead ends: 369 [2024-11-28 03:38:43,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=414, Invalid=6896, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 03:38:43,793 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 112 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:43,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 925 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:38:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-11-28 03:38:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 322. [2024-11-28 03:38:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 320 states have (on average 1.13125) internal successors, (362), 321 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 362 transitions. [2024-11-28 03:38:43,804 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 362 transitions. Word has length 40 [2024-11-28 03:38:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:43,804 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 362 transitions. [2024-11-28 03:38:43,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 362 transitions. [2024-11-28 03:38:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 03:38:43,805 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:43,805 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:43,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:38:44,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:38:44,010 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:44,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:44,010 INFO L85 PathProgramCache]: Analyzing trace with hash -929561544, now seen corresponding path program 4 times [2024-11-28 03:38:44,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:44,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894370371] [2024-11-28 03:38:44,010 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:38:44,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:44,024 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:38:44,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:44,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894370371] [2024-11-28 03:38:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894370371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546519454] [2024-11-28 03:38:44,317 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:38:44,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:44,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:44,321 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:44,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:38:44,420 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:38:44,420 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:44,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 03:38:44,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:44,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:44,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:38:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:44,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546519454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:44,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:44,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2024-11-28 03:38:44,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076547312] [2024-11-28 03:38:44,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:44,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:38:44,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:44,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:38:44,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:38:44,916 INFO L87 Difference]: Start difference. First operand 322 states and 362 transitions. Second operand has 24 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:45,572 INFO L93 Difference]: Finished difference Result 384 states and 427 transitions. [2024-11-28 03:38:45,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:38:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 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 44 [2024-11-28 03:38:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:45,574 INFO L225 Difference]: With dead ends: 384 [2024-11-28 03:38:45,574 INFO L226 Difference]: Without dead ends: 384 [2024-11-28 03:38:45,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:38:45,575 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:45,575 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 661 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:38:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-11-28 03:38:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 347. [2024-11-28 03:38:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.1333333333333333) internal successors, (391), 346 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) [2024-11-28 03:38:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 391 transitions. [2024-11-28 03:38:45,587 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 391 transitions. Word has length 44 [2024-11-28 03:38:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:45,587 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 391 transitions. [2024-11-28 03:38:45,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 391 transitions. [2024-11-28 03:38:45,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 03:38:45,588 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:45,589 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:45,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:38:45,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:38:45,793 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:45,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:45,793 INFO L85 PathProgramCache]: Analyzing trace with hash 409829015, now seen corresponding path program 4 times [2024-11-28 03:38:45,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:45,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497877060] [2024-11-28 03:38:45,793 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:38:45,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:45,815 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:38:45,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:38:47,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497877060] [2024-11-28 03:38:47,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497877060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706733652] [2024-11-28 03:38:47,175 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:38:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:47,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:47,179 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:47,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:38:47,304 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:38:47,304 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:47,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 03:38:47,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:47,526 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 14 treesize of output 10 [2024-11-28 03:38:49,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:38:49,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 122 [2024-11-28 03:38:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:38:50,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:38:51,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-28 03:38:51,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-11-28 03:38:51,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:38:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:38:51,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706733652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:38:51,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:38:51,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 58 [2024-11-28 03:38:51,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942894877] [2024-11-28 03:38:51,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:38:51,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-28 03:38:51,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:38:51,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-28 03:38:51,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3110, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 03:38:51,876 INFO L87 Difference]: Start difference. First operand 347 states and 391 transitions. Second operand has 59 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 59 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:38:53,337 INFO L93 Difference]: Finished difference Result 373 states and 413 transitions. [2024-11-28 03:38:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:38:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 59 states have internal predecessors, (108), 0 states have call successors, (0), 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 46 [2024-11-28 03:38:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:38:53,339 INFO L225 Difference]: With dead ends: 373 [2024-11-28 03:38:53,339 INFO L226 Difference]: Without dead ends: 226 [2024-11-28 03:38:53,340 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=503, Invalid=4053, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 03:38:53,340 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:38:53,341 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 461 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:38:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-28 03:38:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2024-11-28 03:38:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1232876712328768) internal successors, (164), 146 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 164 transitions. [2024-11-28 03:38:53,346 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 164 transitions. Word has length 46 [2024-11-28 03:38:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:38:53,347 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 164 transitions. [2024-11-28 03:38:53,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 59 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:38:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 164 transitions. [2024-11-28 03:38:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:38:53,351 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:38:53,351 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:38:53,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:38:53,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:53,556 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:38:53,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:38:53,556 INFO L85 PathProgramCache]: Analyzing trace with hash 170401466, now seen corresponding path program 5 times [2024-11-28 03:38:53,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:38:53,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241548483] [2024-11-28 03:38:53,556 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:38:53,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:38:53,582 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 03:38:53,582 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:53,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:38:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241548483] [2024-11-28 03:38:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241548483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:38:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059919376] [2024-11-28 03:38:53,998 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:38:53,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:38:53,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:38:54,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:38:54,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:38:54,116 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 03:38:54,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:38:54,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 03:38:54,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:38:54,130 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 [2024-11-28 03:38:54,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-28 03:38:58,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:38:58,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2024-11-28 03:38:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 46 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:38:59,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:00,033 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 13 [2024-11-28 03:39:00,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:39:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:00,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059919376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:00,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2024-11-28 03:39:00,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463223472] [2024-11-28 03:39:00,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:00,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 03:39:00,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:00,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 03:39:00,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2179, Unknown=1, NotChecked=0, Total=2352 [2024-11-28 03:39:00,720 INFO L87 Difference]: Start difference. First operand 147 states and 164 transitions. Second operand has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 49 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:03,968 INFO L93 Difference]: Finished difference Result 300 states and 327 transitions. [2024-11-28 03:39:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 03:39:03,969 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 49 states have internal predecessors, (139), 0 states have call successors, (0), 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 49 [2024-11-28 03:39:03,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:03,969 INFO L225 Difference]: With dead ends: 300 [2024-11-28 03:39:03,970 INFO L226 Difference]: Without dead ends: 201 [2024-11-28 03:39:03,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=532, Invalid=5787, Unknown=1, NotChecked=0, Total=6320 [2024-11-28 03:39:03,971 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 200 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:03,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 711 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:39:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-28 03:39:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2024-11-28 03:39:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.115606936416185) internal successors, (193), 173 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 193 transitions. [2024-11-28 03:39:03,977 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 193 transitions. Word has length 49 [2024-11-28 03:39:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:03,978 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 193 transitions. [2024-11-28 03:39:03,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.836734693877551) internal successors, (139), 49 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 193 transitions. [2024-11-28 03:39:03,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 03:39:03,979 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:03,979 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:03,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:39:04,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:04,180 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:04,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1534807089, now seen corresponding path program 6 times [2024-11-28 03:39:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:04,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362046748] [2024-11-28 03:39:04,180 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:39:04,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:04,221 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 03:39:04,221 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:05,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:05,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362046748] [2024-11-28 03:39:05,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362046748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:05,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003478631] [2024-11-28 03:39:05,423 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:39:05,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:05,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:05,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:05,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:39:05,577 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 03:39:05,578 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:05,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-28 03:39:05,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:06,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:39:06,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:39:06,320 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:39:06,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:39:06,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-28 03:39:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:06,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:06,982 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 13 [2024-11-28 03:39:06,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:39:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003478631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:07,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:07,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 21] total 58 [2024-11-28 03:39:07,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123325] [2024-11-28 03:39:07,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:07,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-28 03:39:07,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:07,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-28 03:39:07,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3100, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 03:39:07,423 INFO L87 Difference]: Start difference. First operand 174 states and 193 transitions. Second operand has 58 states, 58 states have (on average 2.396551724137931) internal successors, (139), 58 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:09,845 INFO L93 Difference]: Finished difference Result 368 states and 398 transitions. [2024-11-28 03:39:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-28 03:39:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.396551724137931) internal successors, (139), 58 states have internal predecessors, (139), 0 states have call successors, (0), 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 58 [2024-11-28 03:39:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:09,846 INFO L225 Difference]: With dead ends: 368 [2024-11-28 03:39:09,846 INFO L226 Difference]: Without dead ends: 213 [2024-11-28 03:39:09,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=440, Invalid=7392, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 03:39:09,848 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 105 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:09,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1241 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:39:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-28 03:39:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2024-11-28 03:39:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.1081081081081081) internal successors, (205), 185 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 205 transitions. [2024-11-28 03:39:09,854 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 205 transitions. Word has length 58 [2024-11-28 03:39:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:09,855 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 205 transitions. [2024-11-28 03:39:09,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.396551724137931) internal successors, (139), 58 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 205 transitions. [2024-11-28 03:39:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 03:39:09,856 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:09,856 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:09,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:39:10,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:10,059 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:10,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1220824682, now seen corresponding path program 7 times [2024-11-28 03:39:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:10,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200488488] [2024-11-28 03:39:10,060 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:39:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:39:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200488488] [2024-11-28 03:39:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200488488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113528976] [2024-11-28 03:39:10,770 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:39:10,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:10,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:10,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:39:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:39:10,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-28 03:39:10,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:11,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:11,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:39:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:11,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113528976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:11,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:11,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2024-11-28 03:39:11,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710533190] [2024-11-28 03:39:11,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:11,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 03:39:11,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:11,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 03:39:11,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:39:11,858 INFO L87 Difference]: Start difference. First operand 186 states and 205 transitions. Second operand has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:12,698 INFO L93 Difference]: Finished difference Result 231 states and 252 transitions. [2024-11-28 03:39:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:39:12,698 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 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 62 [2024-11-28 03:39:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:12,699 INFO L225 Difference]: With dead ends: 231 [2024-11-28 03:39:12,699 INFO L226 Difference]: Without dead ends: 231 [2024-11-28 03:39:12,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=293, Invalid=2359, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 03:39:12,701 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 129 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:12,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 701 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:39:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-28 03:39:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2024-11-28 03:39:12,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.11) internal successors, (222), 200 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2024-11-28 03:39:12,707 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 62 [2024-11-28 03:39:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:12,707 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2024-11-28 03:39:12,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2024-11-28 03:39:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 03:39:12,708 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:12,708 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:12,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 03:39:12,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 03:39:12,910 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:12,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1634493384, now seen corresponding path program 8 times [2024-11-28 03:39:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:12,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561401176] [2024-11-28 03:39:12,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:39:12,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:12,939 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:39:12,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:13,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561401176] [2024-11-28 03:39:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561401176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116540263] [2024-11-28 03:39:13,647 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:39:13,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:13,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:13,649 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:13,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:39:13,776 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:39:13,776 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:13,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-28 03:39:13,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:13,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:39:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:14,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:14,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:39:14,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:39:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:14,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116540263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:14,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:14,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 36 [2024-11-28 03:39:14,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390116302] [2024-11-28 03:39:14,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:14,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:39:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:14,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:39:14,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:39:14,295 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:15,194 INFO L93 Difference]: Finished difference Result 363 states and 396 transitions. [2024-11-28 03:39:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 03:39:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 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 67 [2024-11-28 03:39:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:15,195 INFO L225 Difference]: With dead ends: 363 [2024-11-28 03:39:15,195 INFO L226 Difference]: Without dead ends: 222 [2024-11-28 03:39:15,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 03:39:15,196 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 86 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:15,196 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1271 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:39:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-28 03:39:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2024-11-28 03:39:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1037735849056605) internal successors, (234), 212 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) [2024-11-28 03:39:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 234 transitions. [2024-11-28 03:39:15,201 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 234 transitions. Word has length 67 [2024-11-28 03:39:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:15,201 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 234 transitions. [2024-11-28 03:39:15,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 234 transitions. [2024-11-28 03:39:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-28 03:39:15,202 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:15,202 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:15,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 03:39:15,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 03:39:15,403 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:15,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1300222383, now seen corresponding path program 9 times [2024-11-28 03:39:15,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:15,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981116291] [2024-11-28 03:39:15,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:39:15,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:15,448 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 03:39:15,448 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:16,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:16,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981116291] [2024-11-28 03:39:16,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981116291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:16,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498622093] [2024-11-28 03:39:16,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:39:16,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:16,355 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:16,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:39:16,504 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 03:39:16,504 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:16,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-28 03:39:16,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:16,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:17,364 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 7 treesize of output 5 [2024-11-28 03:39:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498622093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:17,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:17,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 44 [2024-11-28 03:39:17,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878849149] [2024-11-28 03:39:17,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:17,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 03:39:17,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:17,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 03:39:17,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1748, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 03:39:17,602 INFO L87 Difference]: Start difference. First operand 213 states and 234 transitions. Second operand has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:18,552 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2024-11-28 03:39:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:39:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 states have internal predecessors, (149), 0 states have call successors, (0), 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 71 [2024-11-28 03:39:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:18,554 INFO L225 Difference]: With dead ends: 264 [2024-11-28 03:39:18,554 INFO L226 Difference]: Without dead ends: 264 [2024-11-28 03:39:18,555 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=511, Invalid=3029, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 03:39:18,556 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:18,556 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 537 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:39:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-28 03:39:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2024-11-28 03:39:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.105726872246696) internal successors, (251), 227 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 251 transitions. [2024-11-28 03:39:18,561 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 251 transitions. Word has length 71 [2024-11-28 03:39:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:18,562 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 251 transitions. [2024-11-28 03:39:18,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 251 transitions. [2024-11-28 03:39:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 03:39:18,562 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:18,563 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:18,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:39:18,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 03:39:18,763 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:18,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash 438903715, now seen corresponding path program 10 times [2024-11-28 03:39:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:18,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81774927] [2024-11-28 03:39:18,765 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:39:18,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:18,787 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:39:18,788 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:19,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:19,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81774927] [2024-11-28 03:39:19,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81774927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:19,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142311302] [2024-11-28 03:39:19,537 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:39:19,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:19,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:19,539 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:19,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:39:19,683 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:39:19,683 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:19,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-28 03:39:19,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:19,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:39:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:19,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:19,977 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 13 [2024-11-28 03:39:19,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:39:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:20,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142311302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:20,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:20,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 26 [2024-11-28 03:39:20,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053988652] [2024-11-28 03:39:20,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:20,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:39:20,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:20,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:39:20,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:39:20,094 INFO L87 Difference]: Start difference. First operand 228 states and 251 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:20,886 INFO L93 Difference]: Finished difference Result 411 states and 448 transitions. [2024-11-28 03:39:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:39:20,887 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 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 76 [2024-11-28 03:39:20,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:20,887 INFO L225 Difference]: With dead ends: 411 [2024-11-28 03:39:20,888 INFO L226 Difference]: Without dead ends: 249 [2024-11-28 03:39:20,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 03:39:20,888 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 75 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:20,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 1147 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:39:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-28 03:39:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2024-11-28 03:39:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.100418410041841) internal successors, (263), 239 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 263 transitions. [2024-11-28 03:39:20,893 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 263 transitions. Word has length 76 [2024-11-28 03:39:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:20,894 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 263 transitions. [2024-11-28 03:39:20,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 263 transitions. [2024-11-28 03:39:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 03:39:20,895 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:20,895 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:20,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:39:21,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 03:39:21,096 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:21,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash -958043748, now seen corresponding path program 11 times [2024-11-28 03:39:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:21,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203458753] [2024-11-28 03:39:21,096 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:39:21,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:21,122 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 03:39:21,122 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 69 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:21,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:21,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203458753] [2024-11-28 03:39:21,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203458753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:21,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668299676] [2024-11-28 03:39:21,934 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:39:21,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:21,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:21,937 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:21,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:39:22,094 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 03:39:22,095 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:22,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-28 03:39:22,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:22,105 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 [2024-11-28 03:39:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:22,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:24,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668299676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:24,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:24,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 55 [2024-11-28 03:39:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445434110] [2024-11-28 03:39:24,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:24,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-28 03:39:24,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:24,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-28 03:39:24,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=2681, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 03:39:24,077 INFO L87 Difference]: Start difference. First operand 240 states and 263 transitions. Second operand has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:25,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:25,594 INFO L93 Difference]: Finished difference Result 297 states and 322 transitions. [2024-11-28 03:39:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:39:25,594 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 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 [2024-11-28 03:39:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:25,595 INFO L225 Difference]: With dead ends: 297 [2024-11-28 03:39:25,595 INFO L226 Difference]: Without dead ends: 297 [2024-11-28 03:39:25,596 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=606, Invalid=4650, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 03:39:25,597 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 110 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:25,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1146 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:39:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-28 03:39:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 255. [2024-11-28 03:39:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.1023622047244095) internal successors, (280), 254 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 280 transitions. [2024-11-28 03:39:25,601 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 280 transitions. Word has length 80 [2024-11-28 03:39:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:25,601 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 280 transitions. [2024-11-28 03:39:25,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 280 transitions. [2024-11-28 03:39:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 03:39:25,602 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:25,602 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:25,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:39:25,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 03:39:25,803 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:25,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash -132745258, now seen corresponding path program 12 times [2024-11-28 03:39:25,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:25,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693256672] [2024-11-28 03:39:25,803 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:39:25,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:25,840 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 03:39:25,840 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:27,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693256672] [2024-11-28 03:39:27,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693256672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178990140] [2024-11-28 03:39:27,204 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:39:27,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:27,206 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:27,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:39:27,468 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 03:39:27,468 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:27,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 03:39:27,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:27,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:39:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:28,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:28,540 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 13 [2024-11-28 03:39:28,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:39:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:28,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178990140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:28,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:28,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 25, 25] total 57 [2024-11-28 03:39:28,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102744747] [2024-11-28 03:39:28,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:28,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-28 03:39:28,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:28,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-28 03:39:28,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3031, Unknown=0, NotChecked=0, Total=3192 [2024-11-28 03:39:28,720 INFO L87 Difference]: Start difference. First operand 255 states and 280 transitions. Second operand has 57 states, 57 states have (on average 3.0) internal successors, (171), 57 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:31,814 INFO L93 Difference]: Finished difference Result 544 states and 586 transitions. [2024-11-28 03:39:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-28 03:39:31,815 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.0) internal successors, (171), 57 states have internal predecessors, (171), 0 states have call successors, (0), 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 85 [2024-11-28 03:39:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:31,816 INFO L225 Difference]: With dead ends: 544 [2024-11-28 03:39:31,816 INFO L226 Difference]: Without dead ends: 315 [2024-11-28 03:39:31,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=402, Invalid=9300, Unknown=0, NotChecked=0, Total=9702 [2024-11-28 03:39:31,818 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 158 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 3052 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:31,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 2245 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3052 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 03:39:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-28 03:39:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 267. [2024-11-28 03:39:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0977443609022557) internal successors, (292), 266 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 292 transitions. [2024-11-28 03:39:31,823 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 292 transitions. Word has length 85 [2024-11-28 03:39:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:31,823 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 292 transitions. [2024-11-28 03:39:31,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.0) internal successors, (171), 57 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 292 transitions. [2024-11-28 03:39:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-28 03:39:31,824 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:31,825 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:31,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:39:32,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 03:39:32,025 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:32,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1170659837, now seen corresponding path program 13 times [2024-11-28 03:39:32,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:32,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180509006] [2024-11-28 03:39:32,026 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:39:32,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:39:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180509006] [2024-11-28 03:39:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180509006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75936880] [2024-11-28 03:39:33,085 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:39:33,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:33,090 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:33,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:39:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:39:33,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-28 03:39:33,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:33,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:34,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:39:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:34,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75936880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:34,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:34,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2024-11-28 03:39:34,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289464660] [2024-11-28 03:39:34,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:34,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 03:39:34,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:34,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 03:39:34,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2287, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 03:39:34,728 INFO L87 Difference]: Start difference. First operand 267 states and 292 transitions. Second operand has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:36,092 INFO L93 Difference]: Finished difference Result 330 states and 357 transitions. [2024-11-28 03:39:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:39:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 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 89 [2024-11-28 03:39:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:36,093 INFO L225 Difference]: With dead ends: 330 [2024-11-28 03:39:36,093 INFO L226 Difference]: Without dead ends: 330 [2024-11-28 03:39:36,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 142 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=495, Invalid=4335, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 03:39:36,094 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 237 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:36,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1355 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:39:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-28 03:39:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 282. [2024-11-28 03:39:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.099644128113879) internal successors, (309), 281 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 309 transitions. [2024-11-28 03:39:36,099 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 309 transitions. Word has length 89 [2024-11-28 03:39:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:36,100 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 309 transitions. [2024-11-28 03:39:36,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 309 transitions. [2024-11-28 03:39:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-28 03:39:36,101 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:36,101 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:36,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:39:36,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:36,302 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:36,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1646337045, now seen corresponding path program 14 times [2024-11-28 03:39:36,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:36,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848832383] [2024-11-28 03:39:36,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:39:36,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:36,344 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:39:36,344 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:37,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:37,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848832383] [2024-11-28 03:39:37,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848832383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:37,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754367312] [2024-11-28 03:39:37,368 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:39:37,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:37,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:37,370 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:37,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:39:37,537 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:39:37,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:37,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-28 03:39:37,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:37,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:39:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:38,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:38,220 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 13 [2024-11-28 03:39:38,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:39:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:38,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754367312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:38,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:38,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 45 [2024-11-28 03:39:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642048727] [2024-11-28 03:39:38,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:38,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 03:39:38,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:38,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 03:39:38,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 03:39:38,362 INFO L87 Difference]: Start difference. First operand 282 states and 309 transitions. Second operand has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 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) [2024-11-28 03:39:39,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:39,961 INFO L93 Difference]: Finished difference Result 507 states and 552 transitions. [2024-11-28 03:39:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 03:39:39,961 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 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 94 [2024-11-28 03:39:39,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:39,962 INFO L225 Difference]: With dead ends: 507 [2024-11-28 03:39:39,962 INFO L226 Difference]: Without dead ends: 303 [2024-11-28 03:39:39,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=4158, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 03:39:39,963 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 116 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:39,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 2202 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 03:39:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-11-28 03:39:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 294. [2024-11-28 03:39:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.0955631399317407) internal successors, (321), 293 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 321 transitions. [2024-11-28 03:39:39,969 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 321 transitions. Word has length 94 [2024-11-28 03:39:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:39,969 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 321 transitions. [2024-11-28 03:39:39,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 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) [2024-11-28 03:39:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 321 transitions. [2024-11-28 03:39:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-28 03:39:39,971 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:39,971 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:39,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:39:40,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 03:39:40,171 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:40,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:40,172 INFO L85 PathProgramCache]: Analyzing trace with hash -823183922, now seen corresponding path program 15 times [2024-11-28 03:39:40,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:40,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548216587] [2024-11-28 03:39:40,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:39:40,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:40,208 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:39:40,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:41,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:41,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548216587] [2024-11-28 03:39:41,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548216587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:41,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521868585] [2024-11-28 03:39:41,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:39:41,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:41,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:41,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:39:41,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:39:41,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:41,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-28 03:39:41,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:41,628 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 [2024-11-28 03:39:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:42,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:43,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521868585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:43,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:43,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 67 [2024-11-28 03:39:43,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289376681] [2024-11-28 03:39:43,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:43,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-28 03:39:43,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:43,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-28 03:39:43,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3993, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 03:39:43,587 INFO L87 Difference]: Start difference. First operand 294 states and 321 transitions. Second operand has 68 states, 67 states have (on average 3.656716417910448) internal successors, (245), 68 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:45,294 INFO L93 Difference]: Finished difference Result 363 states and 392 transitions. [2024-11-28 03:39:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 03:39:45,295 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.656716417910448) internal successors, (245), 68 states have internal predecessors, (245), 0 states have call successors, (0), 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 98 [2024-11-28 03:39:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:45,296 INFO L225 Difference]: With dead ends: 363 [2024-11-28 03:39:45,296 INFO L226 Difference]: Without dead ends: 363 [2024-11-28 03:39:45,297 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1081, Invalid=6751, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 03:39:45,298 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 191 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:45,298 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 674 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:39:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-28 03:39:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 309. [2024-11-28 03:39:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.0974025974025974) internal successors, (338), 308 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) [2024-11-28 03:39:45,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 338 transitions. [2024-11-28 03:39:45,304 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 338 transitions. Word has length 98 [2024-11-28 03:39:45,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:45,304 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 338 transitions. [2024-11-28 03:39:45,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.656716417910448) internal successors, (245), 68 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 338 transitions. [2024-11-28 03:39:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 03:39:45,306 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:45,306 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:45,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 03:39:45,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:45,506 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:45,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -6391068, now seen corresponding path program 16 times [2024-11-28 03:39:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:45,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382201672] [2024-11-28 03:39:45,507 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:39:45,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:45,535 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:39:45,535 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:46,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:46,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382201672] [2024-11-28 03:39:46,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382201672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:46,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864122275] [2024-11-28 03:39:46,571 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:39:46,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:46,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:46,573 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:46,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:39:46,740 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:39:46,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:46,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-28 03:39:46,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:46,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:39:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:46,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:47,077 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 13 [2024-11-28 03:39:47,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:39:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:47,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864122275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:47,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:47,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 32 [2024-11-28 03:39:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885378650] [2024-11-28 03:39:47,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:47,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 03:39:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:47,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 03:39:47,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:39:47,280 INFO L87 Difference]: Start difference. First operand 309 states and 338 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 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) [2024-11-28 03:39:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:48,575 INFO L93 Difference]: Finished difference Result 555 states and 604 transitions. [2024-11-28 03:39:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 03:39:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 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) Word has length 103 [2024-11-28 03:39:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:48,577 INFO L225 Difference]: With dead ends: 555 [2024-11-28 03:39:48,577 INFO L226 Difference]: Without dead ends: 330 [2024-11-28 03:39:48,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=2599, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 03:39:48,578 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 108 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:48,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 2016 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:39:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-28 03:39:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2024-11-28 03:39:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.09375) internal successors, (350), 320 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 350 transitions. [2024-11-28 03:39:48,584 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 350 transitions. Word has length 103 [2024-11-28 03:39:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:48,584 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 350 transitions. [2024-11-28 03:39:48,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 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) [2024-11-28 03:39:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 350 transitions. [2024-11-28 03:39:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 03:39:48,585 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:48,585 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:48,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:39:48,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:48,786 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:48,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash -810598069, now seen corresponding path program 17 times [2024-11-28 03:39:48,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:48,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070382136] [2024-11-28 03:39:48,787 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:39:48,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:48,825 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 03:39:48,825 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:50,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:50,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070382136] [2024-11-28 03:39:50,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070382136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:50,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200270396] [2024-11-28 03:39:50,101 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:39:50,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:50,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:50,103 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:50,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:39:50,325 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 03:39:50,325 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:50,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-28 03:39:50,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:50,338 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 [2024-11-28 03:39:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:51,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:39:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200270396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:39:53,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:39:53,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 69 [2024-11-28 03:39:53,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246835323] [2024-11-28 03:39:53,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:39:53,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-28 03:39:53,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:39:53,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-28 03:39:53,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=4315, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 03:39:53,081 INFO L87 Difference]: Start difference. First operand 321 states and 350 transitions. Second operand has 70 states, 69 states have (on average 3.8405797101449277) internal successors, (265), 70 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:39:55,297 INFO L93 Difference]: Finished difference Result 396 states and 427 transitions. [2024-11-28 03:39:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 03:39:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.8405797101449277) internal successors, (265), 70 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-28 03:39:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:39:55,299 INFO L225 Difference]: With dead ends: 396 [2024-11-28 03:39:55,299 INFO L226 Difference]: Without dead ends: 396 [2024-11-28 03:39:55,299 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=829, Invalid=7727, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 03:39:55,299 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 233 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:39:55,300 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1892 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:39:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2024-11-28 03:39:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 336. [2024-11-28 03:39:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.0955223880597016) internal successors, (367), 335 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 367 transitions. [2024-11-28 03:39:55,307 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 367 transitions. Word has length 107 [2024-11-28 03:39:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:39:55,307 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 367 transitions. [2024-11-28 03:39:55,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.8405797101449277) internal successors, (265), 70 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:39:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 367 transitions. [2024-11-28 03:39:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 03:39:55,309 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:39:55,309 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:39:55,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 03:39:55,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:55,509 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:39:55,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:39:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash 293279111, now seen corresponding path program 18 times [2024-11-28 03:39:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:39:55,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485995769] [2024-11-28 03:39:55,510 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:39:55,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:39:55,563 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 03:39:55,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 32 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:57,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:39:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485995769] [2024-11-28 03:39:57,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485995769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:39:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408177454] [2024-11-28 03:39:57,675 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:39:57,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:39:57,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:39:57,677 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:39:57,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:39:57,991 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 03:39:57,991 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:39:57,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-11-28 03:39:57,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:39:58,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:39:58,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:39:59,111 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:39:59,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:39:59,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-28 03:39:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:39:59,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:00,418 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 13 [2024-11-28 03:40:00,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:40:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:01,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408177454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:40:01,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:40:01,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36, 33] total 89 [2024-11-28 03:40:01,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014774820] [2024-11-28 03:40:01,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:01,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-28 03:40:01,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:01,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-28 03:40:01,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=7515, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 03:40:01,457 INFO L87 Difference]: Start difference. First operand 336 states and 367 transitions. Second operand has 89 states, 89 states have (on average 3.044943820224719) internal successors, (271), 89 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:40:07,418 INFO L93 Difference]: Finished difference Result 710 states and 764 transitions. [2024-11-28 03:40:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-11-28 03:40:07,418 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.044943820224719) internal successors, (271), 89 states have internal predecessors, (271), 0 states have call successors, (0), 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 112 [2024-11-28 03:40:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:40:07,420 INFO L225 Difference]: With dead ends: 710 [2024-11-28 03:40:07,420 INFO L226 Difference]: Without dead ends: 399 [2024-11-28 03:40:07,421 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5316 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=735, Invalid=20145, Unknown=0, NotChecked=0, Total=20880 [2024-11-28 03:40:07,421 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 492 mSDsluCounter, 3679 mSDsCounter, 0 mSdLazyCounter, 5205 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 3751 SdHoareTripleChecker+Invalid, 5226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 5205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:40:07,421 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 3751 Invalid, 5226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 5205 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 03:40:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-28 03:40:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 348. [2024-11-28 03:40:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.0922190201729107) internal successors, (379), 347 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 379 transitions. [2024-11-28 03:40:07,428 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 379 transitions. Word has length 112 [2024-11-28 03:40:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:40:07,428 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 379 transitions. [2024-11-28 03:40:07,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.044943820224719) internal successors, (271), 89 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 379 transitions. [2024-11-28 03:40:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-28 03:40:07,430 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:40:07,430 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:40:07,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:40:07,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:07,630 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:40:07,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:40:07,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1786090240, now seen corresponding path program 19 times [2024-11-28 03:40:07,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:40:07,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526899202] [2024-11-28 03:40:07,631 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:40:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:40:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:40:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 153 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:08,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:40:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526899202] [2024-11-28 03:40:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526899202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397004882] [2024-11-28 03:40:08,766 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:40:08,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:08,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:40:08,770 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:40:08,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:40:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:40:08,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-28 03:40:08,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:09,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:10,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:40:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:11,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397004882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:40:11,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:40:11,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 62 [2024-11-28 03:40:11,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988034448] [2024-11-28 03:40:11,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:11,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-28 03:40:11,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:11,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-28 03:40:11,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=3499, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 03:40:11,120 INFO L87 Difference]: Start difference. First operand 348 states and 379 transitions. Second operand has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:13,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:40:13,242 INFO L93 Difference]: Finished difference Result 429 states and 462 transitions. [2024-11-28 03:40:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 03:40:13,243 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 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 116 [2024-11-28 03:40:13,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:40:13,244 INFO L225 Difference]: With dead ends: 429 [2024-11-28 03:40:13,244 INFO L226 Difference]: Without dead ends: 429 [2024-11-28 03:40:13,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 187 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2832 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=750, Invalid=6906, Unknown=0, NotChecked=0, Total=7656 [2024-11-28 03:40:13,245 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 340 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:40:13,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1979 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 03:40:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2024-11-28 03:40:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 363. [2024-11-28 03:40:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.0939226519337018) internal successors, (396), 362 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 396 transitions. [2024-11-28 03:40:13,256 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 396 transitions. Word has length 116 [2024-11-28 03:40:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:40:13,256 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 396 transitions. [2024-11-28 03:40:13,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 396 transitions. [2024-11-28 03:40:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-28 03:40:13,257 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:40:13,257 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:40:13,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 03:40:13,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:13,458 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:40:13,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:40:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1344500494, now seen corresponding path program 20 times [2024-11-28 03:40:13,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:40:13,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213503980] [2024-11-28 03:40:13,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:40:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:40:13,496 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:40:13,496 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:14,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:40:14,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213503980] [2024-11-28 03:40:14,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213503980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:14,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262907104] [2024-11-28 03:40:14,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:40:14,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:14,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:40:14,679 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:40:14,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:40:14,875 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:40:14,875 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:14,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-28 03:40:14,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:15,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:40:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:15,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:15,747 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 13 [2024-11-28 03:40:15,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:40:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:15,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262907104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:40:15,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:40:15,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 54 [2024-11-28 03:40:15,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942048513] [2024-11-28 03:40:15,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:15,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 03:40:15,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:15,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 03:40:15,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2710, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 03:40:15,903 INFO L87 Difference]: Start difference. First operand 363 states and 396 transitions. Second operand has 54 states, 54 states have (on average 3.388888888888889) internal successors, (183), 54 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:40:18,328 INFO L93 Difference]: Finished difference Result 651 states and 708 transitions. [2024-11-28 03:40:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 03:40:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.388888888888889) internal successors, (183), 54 states have internal predecessors, (183), 0 states have call successors, (0), 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 121 [2024-11-28 03:40:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:40:18,330 INFO L225 Difference]: With dead ends: 651 [2024-11-28 03:40:18,330 INFO L226 Difference]: Without dead ends: 384 [2024-11-28 03:40:18,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=324, Invalid=6318, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 03:40:18,331 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 218 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 3323 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:40:18,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 3323 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 03:40:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-11-28 03:40:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 375. [2024-11-28 03:40:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.0909090909090908) internal successors, (408), 374 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 408 transitions. [2024-11-28 03:40:18,339 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 408 transitions. Word has length 121 [2024-11-28 03:40:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:40:18,339 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 408 transitions. [2024-11-28 03:40:18,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.388888888888889) internal successors, (183), 54 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 408 transitions. [2024-11-28 03:40:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-28 03:40:18,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:40:18,341 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:40:18,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 03:40:18,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:18,542 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:40:18,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:40:18,543 INFO L85 PathProgramCache]: Analyzing trace with hash 588588953, now seen corresponding path program 21 times [2024-11-28 03:40:18,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:40:18,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372193915] [2024-11-28 03:40:18,543 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:40:18,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:40:18,631 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 03:40:18,631 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:19,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:40:19,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372193915] [2024-11-28 03:40:19,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372193915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:19,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585493273] [2024-11-28 03:40:19,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:40:19,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:40:19,959 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:40:19,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:40:20,363 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 03:40:20,363 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:20,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-28 03:40:20,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:21,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:22,212 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 7 treesize of output 5 [2024-11-28 03:40:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:22,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585493273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:40:22,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:40:22,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31, 31] total 69 [2024-11-28 03:40:22,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316590170] [2024-11-28 03:40:22,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:22,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-28 03:40:22,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:22,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-28 03:40:22,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=4192, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 03:40:22,620 INFO L87 Difference]: Start difference. First operand 375 states and 408 transitions. Second operand has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:40:24,399 INFO L93 Difference]: Finished difference Result 462 states and 497 transitions. [2024-11-28 03:40:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 03:40:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 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 125 [2024-11-28 03:40:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:40:24,402 INFO L225 Difference]: With dead ends: 462 [2024-11-28 03:40:24,402 INFO L226 Difference]: Without dead ends: 462 [2024-11-28 03:40:24,402 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 202 SyntacticMatches, 13 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1437, Invalid=7875, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 03:40:24,403 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 324 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:40:24,403 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 560 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:40:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2024-11-28 03:40:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 390. [2024-11-28 03:40:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0925449871465296) internal successors, (425), 389 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 425 transitions. [2024-11-28 03:40:24,411 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 425 transitions. Word has length 125 [2024-11-28 03:40:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:40:24,411 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 425 transitions. [2024-11-28 03:40:24,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 425 transitions. [2024-11-28 03:40:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-28 03:40:24,414 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:40:24,414 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:40:24,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:40:24,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-28 03:40:24,615 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:40:24,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:40:24,616 INFO L85 PathProgramCache]: Analyzing trace with hash 351203321, now seen corresponding path program 22 times [2024-11-28 03:40:24,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:40:24,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162073938] [2024-11-28 03:40:24,616 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:40:24,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:40:24,649 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:40:24,649 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 190 proven. 502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:26,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:40:26,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162073938] [2024-11-28 03:40:26,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162073938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:26,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402598312] [2024-11-28 03:40:26,421 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:40:26,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:26,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:40:26,424 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:40:26,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:40:26,650 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:40:26,650 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:26,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-28 03:40:26,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:27,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:40:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 26 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:28,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:28,748 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 13 [2024-11-28 03:40:28,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:40:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 26 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402598312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:40:28,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:40:28,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2024-11-28 03:40:28,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22669925] [2024-11-28 03:40:28,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:28,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-28 03:40:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:28,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-28 03:40:28,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=4544, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 03:40:28,956 INFO L87 Difference]: Start difference. First operand 390 states and 425 transitions. Second operand has 70 states, 70 states have (on average 3.642857142857143) internal successors, (255), 70 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:40:34,445 INFO L93 Difference]: Finished difference Result 786 states and 849 transitions. [2024-11-28 03:40:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-28 03:40:34,446 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.642857142857143) internal successors, (255), 70 states have internal predecessors, (255), 0 states have call successors, (0), 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 130 [2024-11-28 03:40:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:40:34,447 INFO L225 Difference]: With dead ends: 786 [2024-11-28 03:40:34,447 INFO L226 Difference]: Without dead ends: 498 [2024-11-28 03:40:34,448 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=662, Invalid=14100, Unknown=0, NotChecked=0, Total=14762 [2024-11-28 03:40:34,448 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 385 mSDsluCounter, 3521 mSDsCounter, 0 mSdLazyCounter, 4616 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 4628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 4616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:40:34,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 3608 Invalid, 4628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 4616 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 03:40:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2024-11-28 03:40:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 417. [2024-11-28 03:40:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.0913461538461537) internal successors, (454), 416 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 454 transitions. [2024-11-28 03:40:34,457 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 454 transitions. Word has length 130 [2024-11-28 03:40:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:40:34,457 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 454 transitions. [2024-11-28 03:40:34,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.642857142857143) internal successors, (255), 70 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 454 transitions. [2024-11-28 03:40:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-28 03:40:34,459 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:40:34,459 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:40:34,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 03:40:34,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:34,660 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:40:34,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:40:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1560858112, now seen corresponding path program 23 times [2024-11-28 03:40:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:40:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867193041] [2024-11-28 03:40:34,661 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:40:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:40:34,720 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 03:40:34,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 28 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:40:36,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867193041] [2024-11-28 03:40:36,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867193041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:36,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666916531] [2024-11-28 03:40:36,301 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:40:36,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:36,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:40:36,302 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:40:36,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:40:36,611 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 03:40:36,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:36,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-28 03:40:36,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:37,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:40:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 28 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:37,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:37,632 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 13 [2024-11-28 03:40:37,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:40:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 28 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:37,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666916531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:40:37,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:40:37,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 37, 37] total 62 [2024-11-28 03:40:37,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314157792] [2024-11-28 03:40:37,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:37,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-28 03:40:37,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:37,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-28 03:40:37,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3607, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 03:40:37,914 INFO L87 Difference]: Start difference. First operand 417 states and 454 transitions. Second operand has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:40:41,138 INFO L93 Difference]: Finished difference Result 747 states and 812 transitions. [2024-11-28 03:40:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-28 03:40:41,138 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 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 139 [2024-11-28 03:40:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:40:41,140 INFO L225 Difference]: With dead ends: 747 [2024-11-28 03:40:41,140 INFO L226 Difference]: Without dead ends: 438 [2024-11-28 03:40:41,140 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=379, Invalid=8551, Unknown=0, NotChecked=0, Total=8930 [2024-11-28 03:40:41,141 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 179 mSDsluCounter, 4068 mSDsCounter, 0 mSdLazyCounter, 3791 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 4176 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:40:41,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 4176 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3791 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 03:40:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-11-28 03:40:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 429. [2024-11-28 03:40:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.088785046728972) internal successors, (466), 428 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 466 transitions. [2024-11-28 03:40:41,146 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 466 transitions. Word has length 139 [2024-11-28 03:40:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:40:41,146 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 466 transitions. [2024-11-28 03:40:41,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.403225806451613) internal successors, (211), 62 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 466 transitions. [2024-11-28 03:40:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-28 03:40:41,148 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:40:41,148 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:40:41,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-28 03:40:41,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 03:40:41,368 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:40:41,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:40:41,369 INFO L85 PathProgramCache]: Analyzing trace with hash 456436967, now seen corresponding path program 24 times [2024-11-28 03:40:41,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:40:41,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649094345] [2024-11-28 03:40:41,370 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:40:41,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:40:41,454 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-28 03:40:41,455 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 276 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:43,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:40:43,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649094345] [2024-11-28 03:40:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649094345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:43,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901721916] [2024-11-28 03:40:43,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:40:43,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:43,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:40:43,353 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:40:43,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:40:44,010 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-28 03:40:44,010 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:44,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-28 03:40:44,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 325 proven. 536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:44,939 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:46,254 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 7 treesize of output 5 [2024-11-28 03:40:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 325 proven. 536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:46,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901721916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:40:46,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:40:46,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35, 35] total 78 [2024-11-28 03:40:46,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032227001] [2024-11-28 03:40:46,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:46,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-28 03:40:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:46,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-28 03:40:46,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=5341, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 03:40:46,736 INFO L87 Difference]: Start difference. First operand 429 states and 466 transitions. Second operand has 79 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 79 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:40:49,094 INFO L93 Difference]: Finished difference Result 528 states and 567 transitions. [2024-11-28 03:40:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 03:40:49,095 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 79 states have internal predecessors, (297), 0 states have call successors, (0), 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 143 [2024-11-28 03:40:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:40:49,096 INFO L225 Difference]: With dead ends: 528 [2024-11-28 03:40:49,096 INFO L226 Difference]: Without dead ends: 528 [2024-11-28 03:40:49,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 232 SyntacticMatches, 15 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5208 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1828, Invalid=10162, Unknown=0, NotChecked=0, Total=11990 [2024-11-28 03:40:49,097 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 429 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:40:49,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 851 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:40:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2024-11-28 03:40:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 444. [2024-11-28 03:40:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.090293453724605) internal successors, (483), 443 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 483 transitions. [2024-11-28 03:40:49,106 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 483 transitions. Word has length 143 [2024-11-28 03:40:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:40:49,107 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 483 transitions. [2024-11-28 03:40:49,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 79 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 483 transitions. [2024-11-28 03:40:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-28 03:40:49,108 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:40:49,109 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:40:49,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 03:40:49,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 03:40:49,309 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:40:49,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:40:49,310 INFO L85 PathProgramCache]: Analyzing trace with hash -774599829, now seen corresponding path program 25 times [2024-11-28 03:40:49,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:40:49,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688459992] [2024-11-28 03:40:49,310 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:40:49,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:40:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:40:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 30 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:50,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:40:50,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688459992] [2024-11-28 03:40:50,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688459992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:50,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828586529] [2024-11-28 03:40:50,936 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:40:50,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:40:50,938 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:40:50,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:40:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:40:51,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-28 03:40:51,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:52,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:40:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 30 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:52,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:40:52,541 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 13 [2024-11-28 03:40:52,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:40:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 30 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:52,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828586529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:40:52,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:40:52,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 63 [2024-11-28 03:40:52,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074020440] [2024-11-28 03:40:52,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:40:52,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-28 03:40:52,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:40:52,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-28 03:40:52,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3730, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 03:40:52,741 INFO L87 Difference]: Start difference. First operand 444 states and 483 transitions. Second operand has 63 states, 63 states have (on average 3.5238095238095237) internal successors, (222), 63 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:40:56,203 INFO L93 Difference]: Finished difference Result 795 states and 864 transitions. [2024-11-28 03:40:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-28 03:40:56,204 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.5238095238095237) internal successors, (222), 63 states have internal predecessors, (222), 0 states have call successors, (0), 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 148 [2024-11-28 03:40:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:40:56,205 INFO L225 Difference]: With dead ends: 795 [2024-11-28 03:40:56,205 INFO L226 Difference]: Without dead ends: 465 [2024-11-28 03:40:56,206 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=384, Invalid=8928, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 03:40:56,206 INFO L435 NwaCegarLoop]: 115 mSDtfsCounter, 182 mSDsluCounter, 4516 mSDsCounter, 0 mSdLazyCounter, 4295 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 4631 SdHoareTripleChecker+Invalid, 4309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:40:56,206 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 4631 Invalid, 4309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4295 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 03:40:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-28 03:40:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 456. [2024-11-28 03:40:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.0879120879120878) internal successors, (495), 455 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 495 transitions. [2024-11-28 03:40:56,212 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 495 transitions. Word has length 148 [2024-11-28 03:40:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:40:56,213 INFO L471 AbstractCegarLoop]: Abstraction has 456 states and 495 transitions. [2024-11-28 03:40:56,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.5238095238095237) internal successors, (222), 63 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:40:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 495 transitions. [2024-11-28 03:40:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-28 03:40:56,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:40:56,214 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:40:56,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 03:40:56,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:56,415 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:40:56,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:40:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash -228097948, now seen corresponding path program 26 times [2024-11-28 03:40:56,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:40:56,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664889465] [2024-11-28 03:40:56,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:40:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:40:56,444 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:40:56,444 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 325 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:58,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:40:58,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664889465] [2024-11-28 03:40:58,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664889465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:40:58,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161693071] [2024-11-28 03:40:58,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:40:58,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:40:58,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:40:58,384 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:40:58,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:40:58,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:40:58,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:40:58,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 153 conjuncts are in the unsatisfiable core [2024-11-28 03:40:58,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:40:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 378 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:40:59,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:01,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:41:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 378 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:01,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161693071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:01,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:41:01,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 79 [2024-11-28 03:41:01,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090101192] [2024-11-28 03:41:01,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:01,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-28 03:41:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:01,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-28 03:41:01,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=5662, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 03:41:01,827 INFO L87 Difference]: Start difference. First operand 456 states and 495 transitions. Second operand has 80 states, 79 states have (on average 3.911392405063291) internal successors, (309), 80 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:05,454 INFO L93 Difference]: Finished difference Result 561 states and 602 transitions. [2024-11-28 03:41:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-28 03:41:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.911392405063291) internal successors, (309), 80 states have internal predecessors, (309), 0 states have call successors, (0), 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 152 [2024-11-28 03:41:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:05,456 INFO L225 Difference]: With dead ends: 561 [2024-11-28 03:41:05,456 INFO L226 Difference]: Without dead ends: 561 [2024-11-28 03:41:05,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 247 SyntacticMatches, 16 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1178, Invalid=11478, Unknown=0, NotChecked=0, Total=12656 [2024-11-28 03:41:05,457 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 390 mSDsluCounter, 3106 mSDsCounter, 0 mSdLazyCounter, 3890 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 3890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:05,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 3209 Invalid, 3890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3890 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 03:41:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-11-28 03:41:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 471. [2024-11-28 03:41:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.0893617021276596) internal successors, (512), 470 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 512 transitions. [2024-11-28 03:41:05,464 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 512 transitions. Word has length 152 [2024-11-28 03:41:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:05,464 INFO L471 AbstractCegarLoop]: Abstraction has 471 states and 512 transitions. [2024-11-28 03:41:05,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.911392405063291) internal successors, (309), 80 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 512 transitions. [2024-11-28 03:41:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-28 03:41:05,466 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:41:05,466 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:05,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 03:41:05,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:05,666 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:41:05,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1917100530, now seen corresponding path program 27 times [2024-11-28 03:41:05,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:41:05,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817276332] [2024-11-28 03:41:05,667 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:41:05,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:41:05,745 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 03:41:05,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 32 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:07,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:41:07,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817276332] [2024-11-28 03:41:07,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817276332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:07,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058766872] [2024-11-28 03:41:07,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:41:07,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:07,822 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:07,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:41:08,718 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 03:41:08,718 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:08,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-11-28 03:41:08,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:10,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:41:10,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:41:10,484 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:41:10,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:41:10,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-28 03:41:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:12,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:14,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-28 03:41:14,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-28 03:41:14,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 03:41:14,580 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 20 [2024-11-28 03:41:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:17,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058766872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:17,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:41:17,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 134 [2024-11-28 03:41:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746133430] [2024-11-28 03:41:17,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:17,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-11-28 03:41:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:17,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-11-28 03:41:17,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=17390, Unknown=0, NotChecked=0, Total=17822 [2024-11-28 03:41:17,711 INFO L87 Difference]: Start difference. First operand 471 states and 512 transitions. Second operand has 134 states, 134 states have (on average 3.4328358208955225) internal successors, (460), 134 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:32,288 INFO L93 Difference]: Finished difference Result 1000 states and 1074 transitions. [2024-11-28 03:41:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2024-11-28 03:41:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 3.4328358208955225) internal successors, (460), 134 states have internal predecessors, (460), 0 states have call successors, (0), 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 157 [2024-11-28 03:41:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:32,290 INFO L225 Difference]: With dead ends: 1000 [2024-11-28 03:41:32,290 INFO L226 Difference]: Without dead ends: 563 [2024-11-28 03:41:32,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15461 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=1277, Invalid=55129, Unknown=0, NotChecked=0, Total=56406 [2024-11-28 03:41:32,291 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 341 mSDsluCounter, 7568 mSDsCounter, 0 mSdLazyCounter, 10763 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 7670 SdHoareTripleChecker+Invalid, 10794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 10763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:32,292 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 7670 Invalid, 10794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 10763 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-28 03:41:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2024-11-28 03:41:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 483. [2024-11-28 03:41:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.0871369294605808) internal successors, (524), 482 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 524 transitions. [2024-11-28 03:41:32,295 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 524 transitions. Word has length 157 [2024-11-28 03:41:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:32,296 INFO L471 AbstractCegarLoop]: Abstraction has 483 states and 524 transitions. [2024-11-28 03:41:32,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 3.4328358208955225) internal successors, (460), 134 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 524 transitions. [2024-11-28 03:41:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-28 03:41:32,297 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:41:32,297 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:32,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 03:41:32,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-28 03:41:32,498 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:41:32,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1935019723, now seen corresponding path program 28 times [2024-11-28 03:41:32,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:41:32,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630387319] [2024-11-28 03:41:32,498 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:41:32,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:41:32,525 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:41:32,525 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 378 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:33,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:41:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630387319] [2024-11-28 03:41:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630387319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206588567] [2024-11-28 03:41:33,921 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:41:33,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:33,923 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:33,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:41:34,306 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:41:34,306 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:34,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-28 03:41:34,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 435 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:34,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:36,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:41:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 435 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:36,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206588567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:36,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:41:36,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 62 [2024-11-28 03:41:36,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663093661] [2024-11-28 03:41:36,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:36,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-28 03:41:36,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:36,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-28 03:41:36,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=3518, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 03:41:36,685 INFO L87 Difference]: Start difference. First operand 483 states and 524 transitions. Second operand has 63 states, 62 states have (on average 4.112903225806452) internal successors, (255), 63 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:41:40,582 INFO L93 Difference]: Finished difference Result 594 states and 637 transitions. [2024-11-28 03:41:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-28 03:41:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.112903225806452) internal successors, (255), 63 states have internal predecessors, (255), 0 states have call successors, (0), 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 161 [2024-11-28 03:41:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:41:40,584 INFO L225 Difference]: With dead ends: 594 [2024-11-28 03:41:40,585 INFO L226 Difference]: Without dead ends: 594 [2024-11-28 03:41:40,585 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 281 SyntacticMatches, 17 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=868, Invalid=8638, Unknown=0, NotChecked=0, Total=9506 [2024-11-28 03:41:40,586 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 436 mSDsluCounter, 3311 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 3422 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:41:40,586 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 3422 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 03:41:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2024-11-28 03:41:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 498. [2024-11-28 03:41:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.0885311871227363) internal successors, (541), 497 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 541 transitions. [2024-11-28 03:41:40,592 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 541 transitions. Word has length 161 [2024-11-28 03:41:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:41:40,592 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 541 transitions. [2024-11-28 03:41:40,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.112903225806452) internal successors, (255), 63 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:41:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 541 transitions. [2024-11-28 03:41:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-28 03:41:40,594 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:41:40,594 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:41:40,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 03:41:40,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-28 03:41:40,795 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:41:40,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:41:40,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1876703267, now seen corresponding path program 29 times [2024-11-28 03:41:40,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:41:40,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927467949] [2024-11-28 03:41:40,796 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:41:40,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:41:40,875 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-28 03:41:40,876 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 34 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:43,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:41:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927467949] [2024-11-28 03:41:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927467949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:41:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549618113] [2024-11-28 03:41:43,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:41:43,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:41:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:41:43,269 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:41:43,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 03:41:43,754 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-28 03:41:43,754 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:41:43,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-11-28 03:41:43,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:43,772 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 [2024-11-28 03:41:44,756 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 14 treesize of output 10 [2024-11-28 03:41:51,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:41:51,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2024-11-28 03:41:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 435 proven. 770 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:52,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:41:55,653 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 13 [2024-11-28 03:41:55,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:41:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 435 proven. 775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:41:59,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549618113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:41:59,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:41:59,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 43, 43] total 131 [2024-11-28 03:41:59,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017976942] [2024-11-28 03:41:59,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:41:59,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-28 03:41:59,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:41:59,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-28 03:41:59,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=15750, Unknown=1, NotChecked=0, Total=17030 [2024-11-28 03:41:59,695 INFO L87 Difference]: Start difference. First operand 498 states and 541 transitions. Second operand has 131 states, 131 states have (on average 3.7404580152671754) internal successors, (490), 131 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:30,777 INFO L93 Difference]: Finished difference Result 1002 states and 1081 transitions. [2024-11-28 03:43:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-28 03:43:30,778 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.7404580152671754) internal successors, (490), 131 states have internal predecessors, (490), 0 states have call successors, (0), 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 166 [2024-11-28 03:43:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:30,779 INFO L225 Difference]: With dead ends: 1002 [2024-11-28 03:43:30,779 INFO L226 Difference]: Without dead ends: 630 [2024-11-28 03:43:30,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12109 ImplicationChecksByTransitivity, 96.7s TimeCoverageRelationStatistics Valid=2893, Invalid=41838, Unknown=1, NotChecked=0, Total=44732 [2024-11-28 03:43:30,783 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 931 mSDsluCounter, 4809 mSDsCounter, 0 mSdLazyCounter, 6687 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 4920 SdHoareTripleChecker+Invalid, 6691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6687 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:30,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 4920 Invalid, 6691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6687 Invalid, 4 Unknown, 0 Unchecked, 7.9s Time] [2024-11-28 03:43:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2024-11-28 03:43:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 525. [2024-11-28 03:43:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.0877862595419847) internal successors, (570), 524 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 570 transitions. [2024-11-28 03:43:30,791 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 570 transitions. Word has length 166 [2024-11-28 03:43:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:30,791 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 570 transitions. [2024-11-28 03:43:30,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.7404580152671754) internal successors, (490), 131 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 570 transitions. [2024-11-28 03:43:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-11-28 03:43:30,793 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:30,793 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:30,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 03:43:30,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-28 03:43:30,994 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:43:30,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash 283925788, now seen corresponding path program 30 times [2024-11-28 03:43:30,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:30,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759237455] [2024-11-28 03:43:30,995 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:43:30,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:31,102 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 03:43:31,102 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 53 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759237455] [2024-11-28 03:43:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759237455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88649957] [2024-11-28 03:43:34,807 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:43:34,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:34,809 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:34,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:43:36,358 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-28 03:43:36,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:36,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 196 conjuncts are in the unsatisfiable core [2024-11-28 03:43:36,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:37,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:43:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 36 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:39,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:39,914 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 13 [2024-11-28 03:43:39,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:43:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 36 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:40,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88649957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:40,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:43:40,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 45, 45] total 100 [2024-11-28 03:43:40,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709511133] [2024-11-28 03:43:40,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:40,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-28 03:43:40,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:43:40,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-28 03:43:40,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=9620, Unknown=0, NotChecked=0, Total=9900 [2024-11-28 03:43:40,259 INFO L87 Difference]: Start difference. First operand 525 states and 570 transitions. Second operand has 100 states, 100 states have (on average 3.51) internal successors, (351), 100 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:52,557 INFO L93 Difference]: Finished difference Result 1114 states and 1196 transitions. [2024-11-28 03:43:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-28 03:43:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.51) internal successors, (351), 100 states have internal predecessors, (351), 0 states have call successors, (0), 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 175 [2024-11-28 03:43:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:52,559 INFO L225 Difference]: With dead ends: 1114 [2024-11-28 03:43:52,559 INFO L226 Difference]: Without dead ends: 625 [2024-11-28 03:43:52,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7755 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=775, Invalid=33265, Unknown=0, NotChecked=0, Total=34040 [2024-11-28 03:43:52,563 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 348 mSDsluCounter, 8099 mSDsCounter, 0 mSdLazyCounter, 10575 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 8213 SdHoareTripleChecker+Invalid, 10609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 10575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:52,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 8213 Invalid, 10609 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 10575 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-28 03:43:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2024-11-28 03:43:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 537. [2024-11-28 03:43:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.085820895522388) internal successors, (582), 536 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 582 transitions. [2024-11-28 03:43:52,571 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 582 transitions. Word has length 175 [2024-11-28 03:43:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:52,572 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 582 transitions. [2024-11-28 03:43:52,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.51) internal successors, (351), 100 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:43:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 582 transitions. [2024-11-28 03:43:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-28 03:43:52,573 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:52,574 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:52,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 03:43:52,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-28 03:43:52,774 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:43:52,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1687087997, now seen corresponding path program 31 times [2024-11-28 03:43:52,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:43:52,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610530757] [2024-11-28 03:43:52,775 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:43:52,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:43:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 496 proven. 935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:55,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:43:55,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610530757] [2024-11-28 03:43:55,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610530757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:55,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335993113] [2024-11-28 03:43:55,585 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:43:55,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:55,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:55,587 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:55,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:43:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:55,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-28 03:43:55,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 561 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:43:57,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:59,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:44:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 561 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:00,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335993113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:00,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:00,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 90 [2024-11-28 03:44:00,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180158019] [2024-11-28 03:44:00,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:00,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-28 03:44:00,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:00,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-28 03:44:00,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=882, Invalid=7308, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 03:44:00,942 INFO L87 Difference]: Start difference. First operand 537 states and 582 transitions. Second operand has 91 states, 90 states have (on average 4.011111111111111) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:06,328 INFO L93 Difference]: Finished difference Result 660 states and 707 transitions. [2024-11-28 03:44:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 03:44:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 4.011111111111111) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 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 179 [2024-11-28 03:44:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:06,330 INFO L225 Difference]: With dead ends: 660 [2024-11-28 03:44:06,330 INFO L226 Difference]: Without dead ends: 660 [2024-11-28 03:44:06,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 292 SyntacticMatches, 19 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6483 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1554, Invalid=15216, Unknown=0, NotChecked=0, Total=16770 [2024-11-28 03:44:06,331 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 485 mSDsluCounter, 4080 mSDsCounter, 0 mSdLazyCounter, 5025 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 4201 SdHoareTripleChecker+Invalid, 5025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:06,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 4201 Invalid, 5025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5025 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-28 03:44:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2024-11-28 03:44:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 552. [2024-11-28 03:44:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.087114337568058) internal successors, (599), 551 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) [2024-11-28 03:44:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 599 transitions. [2024-11-28 03:44:06,338 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 599 transitions. Word has length 179 [2024-11-28 03:44:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:06,338 INFO L471 AbstractCegarLoop]: Abstraction has 552 states and 599 transitions. [2024-11-28 03:44:06,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 4.011111111111111) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 599 transitions. [2024-11-28 03:44:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-28 03:44:06,340 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:06,340 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:06,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 03:44:06,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-28 03:44:06,541 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:44:06,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:06,541 INFO L85 PathProgramCache]: Analyzing trace with hash -462125745, now seen corresponding path program 32 times [2024-11-28 03:44:06,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:06,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663425622] [2024-11-28 03:44:06,542 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:06,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:06,611 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:44:06,611 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 38 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:08,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:08,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663425622] [2024-11-28 03:44:08,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663425622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:44:08,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485631338] [2024-11-28 03:44:08,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:08,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:08,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:08,941 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:08,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 03:44:09,267 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:44:09,267 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:09,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 231 conjuncts are in the unsatisfiable core [2024-11-28 03:44:09,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:11,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:44:11,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:44:11,647 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:44:11,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:44:11,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-28 03:44:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 38 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:12,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:12,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:44:12,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:44:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 38 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:14,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485631338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:14,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:14,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 52, 49] total 103 [2024-11-28 03:44:14,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332454882] [2024-11-28 03:44:14,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:14,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-28 03:44:14,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:14,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-28 03:44:14,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=10162, Unknown=0, NotChecked=0, Total=10506 [2024-11-28 03:44:14,736 INFO L87 Difference]: Start difference. First operand 552 states and 599 transitions. Second operand has 103 states, 103 states have (on average 3.436893203883495) internal successors, (354), 103 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:27,512 INFO L93 Difference]: Finished difference Result 1077 states and 1164 transitions. [2024-11-28 03:44:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-28 03:44:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.436893203883495) internal successors, (354), 103 states have internal predecessors, (354), 0 states have call successors, (0), 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 184 [2024-11-28 03:44:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:27,514 INFO L225 Difference]: With dead ends: 1077 [2024-11-28 03:44:27,514 INFO L226 Difference]: Without dead ends: 656 [2024-11-28 03:44:27,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8299 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1137, Invalid=34773, Unknown=0, NotChecked=0, Total=35910 [2024-11-28 03:44:27,516 INFO L435 NwaCegarLoop]: 138 mSDtfsCounter, 418 mSDsluCounter, 9194 mSDsCounter, 0 mSdLazyCounter, 9510 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 9332 SdHoareTripleChecker+Invalid, 9546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 9510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:27,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 9332 Invalid, 9546 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 9510 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-28 03:44:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2024-11-28 03:44:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 564. [2024-11-28 03:44:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.0852575488454708) internal successors, (611), 563 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 611 transitions. [2024-11-28 03:44:27,521 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 611 transitions. Word has length 184 [2024-11-28 03:44:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:27,521 INFO L471 AbstractCegarLoop]: Abstraction has 564 states and 611 transitions. [2024-11-28 03:44:27,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.436893203883495) internal successors, (354), 103 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 611 transitions. [2024-11-28 03:44:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-28 03:44:27,522 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:27,522 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:27,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 03:44:27,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-28 03:44:27,723 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:44:27,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1210437176, now seen corresponding path program 33 times [2024-11-28 03:44:27,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:27,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880798308] [2024-11-28 03:44:27,724 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:44:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:27,810 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-28 03:44:27,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 561 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:30,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:30,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880798308] [2024-11-28 03:44:30,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880798308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:44:30,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497329442] [2024-11-28 03:44:30,781 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:44:30,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:30,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:30,783 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:30,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 03:44:32,176 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-28 03:44:32,176 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:32,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 153 conjuncts are in the unsatisfiable core [2024-11-28 03:44:32,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 630 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:33,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:35,880 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 7 treesize of output 5 [2024-11-28 03:44:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 630 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497329442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:36,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:36,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 45, 45] total 99 [2024-11-28 03:44:36,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65593555] [2024-11-28 03:44:36,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:36,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-28 03:44:36,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:36,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-28 03:44:36,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1423, Invalid=8477, Unknown=0, NotChecked=0, Total=9900 [2024-11-28 03:44:36,787 INFO L87 Difference]: Start difference. First operand 564 states and 611 transitions. Second operand has 100 states, 99 states have (on average 3.9292929292929295) internal successors, (389), 100 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:40,418 INFO L93 Difference]: Finished difference Result 693 states and 742 transitions. [2024-11-28 03:44:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-28 03:44:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 3.9292929292929295) internal successors, (389), 100 states have internal predecessors, (389), 0 states have call successors, (0), 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 188 [2024-11-28 03:44:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:40,421 INFO L225 Difference]: With dead ends: 693 [2024-11-28 03:44:40,421 INFO L226 Difference]: Without dead ends: 693 [2024-11-28 03:44:40,422 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 307 SyntacticMatches, 20 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9202 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3162, Invalid=16578, Unknown=0, NotChecked=0, Total=19740 [2024-11-28 03:44:40,422 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 540 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:40,422 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 981 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:44:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2024-11-28 03:44:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 579. [2024-11-28 03:44:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.0865051903114187) internal successors, (628), 578 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 628 transitions. [2024-11-28 03:44:40,429 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 628 transitions. Word has length 188 [2024-11-28 03:44:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:40,429 INFO L471 AbstractCegarLoop]: Abstraction has 579 states and 628 transitions. [2024-11-28 03:44:40,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 3.9292929292929295) internal successors, (389), 100 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:44:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 628 transitions. [2024-11-28 03:44:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-11-28 03:44:40,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:40,431 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:40,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 03:44:40,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-28 03:44:40,632 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:44:40,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash 334752554, now seen corresponding path program 34 times [2024-11-28 03:44:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:44:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527960815] [2024-11-28 03:44:40,632 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:44:40,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:44:40,693 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:44:40,693 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 40 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:43,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:44:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527960815] [2024-11-28 03:44:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527960815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:44:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412605583] [2024-11-28 03:44:43,256 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:44:43,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:43,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:43,260 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:43,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 03:44:43,647 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:44:43,647 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:43,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 240 conjuncts are in the unsatisfiable core [2024-11-28 03:44:43,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:45,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:44:45,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:44:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 59 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:48,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:51,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-28 03:44:51,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-28 03:44:51,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 03:44:51,050 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 14 treesize of output 12 [2024-11-28 03:44:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 59 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:44:51,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412605583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:51,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:44:51,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 53, 53] total 129 [2024-11-28 03:44:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215018920] [2024-11-28 03:44:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:51,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-28 03:44:51,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:44:51,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-28 03:44:51,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=16146, Unknown=0, NotChecked=0, Total=16512 [2024-11-28 03:44:51,584 INFO L87 Difference]: Start difference. First operand 579 states and 628 transitions. Second operand has 129 states, 129 states have (on average 3.806201550387597) internal successors, (491), 129 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:04,291 INFO L93 Difference]: Finished difference Result 1228 states and 1318 transitions. [2024-11-28 03:45:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2024-11-28 03:45:04,292 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.806201550387597) internal successors, (491), 129 states have internal predecessors, (491), 0 states have call successors, (0), 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 193 [2024-11-28 03:45:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:04,293 INFO L225 Difference]: With dead ends: 1228 [2024-11-28 03:45:04,293 INFO L226 Difference]: Without dead ends: 687 [2024-11-28 03:45:04,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10906 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=857, Invalid=44725, Unknown=0, NotChecked=0, Total=45582 [2024-11-28 03:45:04,295 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 376 mSDsluCounter, 11164 mSDsCounter, 0 mSdLazyCounter, 14495 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 11290 SdHoareTripleChecker+Invalid, 14534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 14495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:45:04,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 11290 Invalid, 14534 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 14495 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-28 03:45:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-11-28 03:45:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 591. [2024-11-28 03:45:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.0847457627118644) internal successors, (640), 590 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 640 transitions. [2024-11-28 03:45:04,299 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 640 transitions. Word has length 193 [2024-11-28 03:45:04,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:04,299 INFO L471 AbstractCegarLoop]: Abstraction has 591 states and 640 transitions. [2024-11-28 03:45:04,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.806201550387597) internal successors, (491), 129 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 640 transitions. [2024-11-28 03:45:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-28 03:45:04,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:04,301 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:04,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 03:45:04,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:04,501 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:45:04,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:04,501 INFO L85 PathProgramCache]: Analyzing trace with hash 283522769, now seen corresponding path program 35 times [2024-11-28 03:45:04,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:04,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494854462] [2024-11-28 03:45:04,502 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:45:04,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:04,623 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-11-28 03:45:04,623 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 703 proven. 1067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:08,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494854462] [2024-11-28 03:45:08,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494854462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:08,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987580475] [2024-11-28 03:45:08,027 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:45:08,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:08,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:08,029 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:08,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 03:45:08,837 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-11-28 03:45:08,837 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:08,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 206 conjuncts are in the unsatisfiable core [2024-11-28 03:45:08,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:08,856 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 [2024-11-28 03:45:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 703 proven. 1067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:11,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 703 proven. 1067 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:18,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987580475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:18,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:18,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 121 [2024-11-28 03:45:18,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051741886] [2024-11-28 03:45:18,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:18,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-11-28 03:45:18,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:18,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-11-28 03:45:18,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1616, Invalid=13146, Unknown=0, NotChecked=0, Total=14762 [2024-11-28 03:45:18,317 INFO L87 Difference]: Start difference. First operand 591 states and 640 transitions. Second operand has 122 states, 121 states have (on average 4.041322314049586) internal successors, (489), 122 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:25,467 INFO L93 Difference]: Finished difference Result 726 states and 777 transitions. [2024-11-28 03:45:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-28 03:45:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 4.041322314049586) internal successors, (489), 122 states have internal predecessors, (489), 0 states have call successors, (0), 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 197 [2024-11-28 03:45:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:25,470 INFO L225 Difference]: With dead ends: 726 [2024-11-28 03:45:25,470 INFO L226 Difference]: Without dead ends: 726 [2024-11-28 03:45:25,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6952 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2422, Invalid=24638, Unknown=0, NotChecked=0, Total=27060 [2024-11-28 03:45:25,471 INFO L435 NwaCegarLoop]: 135 mSDtfsCounter, 614 mSDsluCounter, 5250 mSDsCounter, 0 mSdLazyCounter, 6140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 5385 SdHoareTripleChecker+Invalid, 6140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:45:25,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 5385 Invalid, 6140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6140 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-28 03:45:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2024-11-28 03:45:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 606. [2024-11-28 03:45:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.0859504132231406) internal successors, (657), 605 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 657 transitions. [2024-11-28 03:45:25,477 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 657 transitions. Word has length 197 [2024-11-28 03:45:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:25,477 INFO L471 AbstractCegarLoop]: Abstraction has 606 states and 657 transitions. [2024-11-28 03:45:25,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 4.041322314049586) internal successors, (489), 122 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 657 transitions. [2024-11-28 03:45:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-28 03:45:25,479 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:25,479 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:25,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 03:45:25,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:25,680 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:45:25,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash 436118465, now seen corresponding path program 36 times [2024-11-28 03:45:25,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:25,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428610766] [2024-11-28 03:45:25,680 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:45:25,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:25,776 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2024-11-28 03:45:25,776 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 630 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:32,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:32,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428610766] [2024-11-28 03:45:32,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428610766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:45:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704671537] [2024-11-28 03:45:32,206 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:45:32,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:32,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:32,208 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:32,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 03:45:33,767 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2024-11-28 03:45:33,768 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:33,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 232 conjuncts are in the unsatisfiable core [2024-11-28 03:45:33,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:35,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:45:38,686 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 7 treesize of output 3 [2024-11-28 03:45:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 42 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:38,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:39,259 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 13 [2024-11-28 03:45:39,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:45:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 42 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:39,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704671537] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:39,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:45:39,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 51, 51] total 112 [2024-11-28 03:45:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246383078] [2024-11-28 03:45:39,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:39,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-28 03:45:39,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:39,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-28 03:45:39,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=11728, Unknown=0, NotChecked=0, Total=12432 [2024-11-28 03:45:39,680 INFO L87 Difference]: Start difference. First operand 606 states and 657 transitions. Second operand has 112 states, 112 states have (on average 3.6517857142857144) internal successors, (409), 112 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:46:09,141 INFO L93 Difference]: Finished difference Result 1398 states and 1492 transitions. [2024-11-28 03:46:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2024-11-28 03:46:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.6517857142857144) internal successors, (409), 112 states have internal predecessors, (409), 0 states have call successors, (0), 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 202 [2024-11-28 03:46:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:46:09,143 INFO L225 Difference]: With dead ends: 1398 [2024-11-28 03:46:09,143 INFO L226 Difference]: Without dead ends: 830 [2024-11-28 03:46:09,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22618 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=4444, Invalid=78788, Unknown=0, NotChecked=0, Total=83232 [2024-11-28 03:46:09,147 INFO L435 NwaCegarLoop]: 132 mSDtfsCounter, 552 mSDsluCounter, 8357 mSDsCounter, 0 mSdLazyCounter, 11781 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 8489 SdHoareTripleChecker+Invalid, 11941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 11781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:46:09,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 8489 Invalid, 11941 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [160 Valid, 11781 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2024-11-28 03:46:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2024-11-28 03:46:09,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 716. [2024-11-28 03:46:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.0741258741258741) internal successors, (768), 715 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 768 transitions. [2024-11-28 03:46:09,153 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 768 transitions. Word has length 202 [2024-11-28 03:46:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:46:09,154 INFO L471 AbstractCegarLoop]: Abstraction has 716 states and 768 transitions. [2024-11-28 03:46:09,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.6517857142857144) internal successors, (409), 112 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 768 transitions. [2024-11-28 03:46:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-28 03:46:09,155 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:46:09,156 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:09,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 03:46:09,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-28 03:46:09,356 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:46:09,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash 966655672, now seen corresponding path program 1 times [2024-11-28 03:46:09,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:46:09,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005718590] [2024-11-28 03:46:09,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:46:09,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:46:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:46:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 703 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:12,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:46:12,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005718590] [2024-11-28 03:46:12,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005718590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:46:12,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144542485] [2024-11-28 03:46:12,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:46:12,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:12,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:12,656 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:46:12,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 03:46:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:46:13,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 207 conjuncts are in the unsatisfiable core [2024-11-28 03:46:13,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 780 proven. 1173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:15,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:17,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:46:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 780 proven. 1173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144542485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:46:18,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:46:18,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 102 [2024-11-28 03:46:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647860422] [2024-11-28 03:46:18,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:46:18,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-28 03:46:18,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:46:18,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-28 03:46:18,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1148, Invalid=9358, Unknown=0, NotChecked=0, Total=10506 [2024-11-28 03:46:18,413 INFO L87 Difference]: Start difference. First operand 716 states and 768 transitions. Second operand has 103 states, 102 states have (on average 4.068627450980392) internal successors, (415), 103 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:46:24,982 INFO L93 Difference]: Finished difference Result 959 states and 1013 transitions. [2024-11-28 03:46:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-28 03:46:24,982 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 4.068627450980392) internal successors, (415), 103 states have internal predecessors, (415), 0 states have call successors, (0), 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 206 [2024-11-28 03:46:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:46:24,984 INFO L225 Difference]: With dead ends: 959 [2024-11-28 03:46:24,984 INFO L226 Difference]: Without dead ends: 959 [2024-11-28 03:46:24,986 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 337 SyntacticMatches, 22 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8701 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1991, Invalid=19765, Unknown=0, NotChecked=0, Total=21756 [2024-11-28 03:46:24,986 INFO L435 NwaCegarLoop]: 141 mSDtfsCounter, 808 mSDsluCounter, 5374 mSDsCounter, 0 mSdLazyCounter, 6451 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 5515 SdHoareTripleChecker+Invalid, 6451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:46:24,986 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 5515 Invalid, 6451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6451 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 03:46:24,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2024-11-28 03:46:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 633. [2024-11-28 03:46:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.0854430379746836) internal successors, (686), 632 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 686 transitions. [2024-11-28 03:46:24,997 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 686 transitions. Word has length 206 [2024-11-28 03:46:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:46:24,997 INFO L471 AbstractCegarLoop]: Abstraction has 633 states and 686 transitions. [2024-11-28 03:46:24,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 4.068627450980392) internal successors, (415), 103 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 686 transitions. [2024-11-28 03:46:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-28 03:46:24,998 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:46:24,998 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:25,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 03:46:25,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-28 03:46:25,199 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:46:25,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash 948578360, now seen corresponding path program 37 times [2024-11-28 03:46:25,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:46:25,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688502156] [2024-11-28 03:46:25,200 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:46:25,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:46:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:46:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 44 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:28,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:46:28,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688502156] [2024-11-28 03:46:28,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688502156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:46:28,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95499114] [2024-11-28 03:46:28,686 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:46:28,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:28,688 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:46:28,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 03:46:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:46:29,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 238 conjuncts are in the unsatisfiable core [2024-11-28 03:46:29,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:30,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:46:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 44 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:31,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:31,355 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 13 [2024-11-28 03:46:31,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:46:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 44 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:31,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95499114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:46:31,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:46:31,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53, 53] total 84 [2024-11-28 03:46:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106012618] [2024-11-28 03:46:31,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:46:31,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-28 03:46:31,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:46:31,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-28 03:46:31,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=6740, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 03:46:31,670 INFO L87 Difference]: Start difference. First operand 633 states and 686 transitions. Second operand has 84 states, 84 states have (on average 3.7261904761904763) internal successors, (313), 84 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) [2024-11-28 03:46:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:46:39,105 INFO L93 Difference]: Finished difference Result 1131 states and 1228 transitions. [2024-11-28 03:46:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-28 03:46:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.7261904761904763) internal successors, (313), 84 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 211 [2024-11-28 03:46:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:46:39,107 INFO L225 Difference]: With dead ends: 1131 [2024-11-28 03:46:39,107 INFO L226 Difference]: Without dead ends: 654 [2024-11-28 03:46:39,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=524, Invalid=16768, Unknown=0, NotChecked=0, Total=17292 [2024-11-28 03:46:39,109 INFO L435 NwaCegarLoop]: 164 mSDtfsCounter, 265 mSDsluCounter, 8175 mSDsCounter, 0 mSdLazyCounter, 7785 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 8339 SdHoareTripleChecker+Invalid, 7806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 7785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:46:39,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 8339 Invalid, 7806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 7785 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-28 03:46:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2024-11-28 03:46:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 645. [2024-11-28 03:46:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0838509316770186) internal successors, (698), 644 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 698 transitions. [2024-11-28 03:46:39,117 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 698 transitions. Word has length 211 [2024-11-28 03:46:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:46:39,118 INFO L471 AbstractCegarLoop]: Abstraction has 645 states and 698 transitions. [2024-11-28 03:46:39,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.7261904761904763) internal successors, (313), 84 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) [2024-11-28 03:46:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 698 transitions. [2024-11-28 03:46:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-11-28 03:46:39,119 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:46:39,120 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:39,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-28 03:46:39,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:39,320 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:46:39,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1312458721, now seen corresponding path program 38 times [2024-11-28 03:46:39,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:46:39,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560795522] [2024-11-28 03:46:39,321 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:46:39,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:46:39,380 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:46:39,380 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 780 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:43,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:46:43,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560795522] [2024-11-28 03:46:43,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560795522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:46:43,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266572059] [2024-11-28 03:46:43,401 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:46:43,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:43,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:43,402 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:46:43,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 03:46:43,771 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:46:43,771 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:43,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 222 conjuncts are in the unsatisfiable core [2024-11-28 03:46:43,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:43,794 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 [2024-11-28 03:46:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 861 proven. 1284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:46,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 861 proven. 1284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266572059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:46:52,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:46:52,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 130 [2024-11-28 03:46:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551511958] [2024-11-28 03:46:52,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:46:52,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-28 03:46:52,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:46:52,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-28 03:46:52,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=14813, Unknown=0, NotChecked=0, Total=17030 [2024-11-28 03:46:52,612 INFO L87 Difference]: Start difference. First operand 645 states and 698 transitions. Second operand has 131 states, 130 states have (on average 4.069230769230769) internal successors, (529), 131 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:47:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:47:00,527 INFO L93 Difference]: Finished difference Result 792 states and 847 transitions. [2024-11-28 03:47:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-28 03:47:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 4.069230769230769) internal successors, (529), 131 states have internal predecessors, (529), 0 states have call successors, (0), 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 215 [2024-11-28 03:47:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:47:00,531 INFO L225 Difference]: With dead ends: 792 [2024-11-28 03:47:00,531 INFO L226 Difference]: Without dead ends: 792 [2024-11-28 03:47:00,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10226 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=3143, Invalid=28363, Unknown=0, NotChecked=0, Total=31506 [2024-11-28 03:47:00,532 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 753 mSDsluCounter, 5501 mSDsCounter, 0 mSdLazyCounter, 6490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 5646 SdHoareTripleChecker+Invalid, 6490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:47:00,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 5646 Invalid, 6490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6490 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-28 03:47:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2024-11-28 03:47:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 660. [2024-11-28 03:47:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 1.0849772382397571) internal successors, (715), 659 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:47:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 715 transitions. [2024-11-28 03:47:00,541 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 715 transitions. Word has length 215 [2024-11-28 03:47:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:47:00,541 INFO L471 AbstractCegarLoop]: Abstraction has 660 states and 715 transitions. [2024-11-28 03:47:00,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 4.069230769230769) internal successors, (529), 131 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:47:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 715 transitions. [2024-11-28 03:47:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-28 03:47:00,543 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:47:00,543 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:47:00,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-28 03:47:00,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:47:00,744 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:47:00,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:47:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1667628237, now seen corresponding path program 39 times [2024-11-28 03:47:00,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:47:00,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119726915] [2024-11-28 03:47:00,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:47:00,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:47:00,910 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-28 03:47:00,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:47:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 46 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:47:05,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:47:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119726915] [2024-11-28 03:47:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119726915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:47:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288093758] [2024-11-28 03:47:05,174 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:47:05,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:47:05,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:47:05,175 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:47:05,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 03:47:08,568 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-28 03:47:08,569 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:47:08,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 273 conjuncts are in the unsatisfiable core [2024-11-28 03:47:08,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:47:11,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:47:11,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:47:12,108 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:47:12,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:47:12,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-28 03:47:15,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:47:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 68 proven. 2189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:47:15,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:47:19,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-28 03:47:19,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-28 03:47:19,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 03:47:19,690 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 20 [2024-11-28 03:47:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 68 proven. 2189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:47:25,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288093758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:47:25,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:47:25,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 60, 60] total 178 [2024-11-28 03:47:25,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566835333] [2024-11-28 03:47:25,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:47:25,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2024-11-28 03:47:25,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:47:25,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2024-11-28 03:47:25,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=30928, Unknown=0, NotChecked=0, Total=31506 [2024-11-28 03:47:25,219 INFO L87 Difference]: Start difference. First operand 660 states and 715 transitions. Second operand has 178 states, 178 states have (on average 3.646067415730337) internal successors, (649), 178 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:47:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:47:55,382 INFO L93 Difference]: Finished difference Result 1399 states and 1501 transitions. [2024-11-28 03:47:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2024-11-28 03:47:55,383 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 3.646067415730337) internal successors, (649), 178 states have internal predecessors, (649), 0 states have call successors, (0), 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 220 [2024-11-28 03:47:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:47:55,385 INFO L225 Difference]: With dead ends: 1399 [2024-11-28 03:47:55,385 INFO L226 Difference]: Without dead ends: 780 [2024-11-28 03:47:55,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28668 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=1749, Invalid=100971, Unknown=0, NotChecked=0, Total=102720 [2024-11-28 03:47:55,389 INFO L435 NwaCegarLoop]: 144 mSDtfsCounter, 457 mSDsluCounter, 15737 mSDsCounter, 0 mSdLazyCounter, 20921 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 15881 SdHoareTripleChecker+Invalid, 20966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 20921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:47:55,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 15881 Invalid, 20966 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 20921 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2024-11-28 03:47:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2024-11-28 03:47:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 672. [2024-11-28 03:47:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.0834575260804769) internal successors, (727), 671 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:47:55,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 727 transitions. [2024-11-28 03:47:55,399 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 727 transitions. Word has length 220 [2024-11-28 03:47:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:47:55,399 INFO L471 AbstractCegarLoop]: Abstraction has 672 states and 727 transitions. [2024-11-28 03:47:55,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 3.646067415730337) internal successors, (649), 178 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:47:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 727 transitions. [2024-11-28 03:47:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-28 03:47:55,400 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:47:55,400 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:47:55,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 03:47:55,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:47:55,601 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:47:55,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:47:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1844225836, now seen corresponding path program 40 times [2024-11-28 03:47:55,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:47:55,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680757921] [2024-11-28 03:47:55,601 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:47:55,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:47:55,650 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:47:55,650 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:47:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 861 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:47:58,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:47:58,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680757921] [2024-11-28 03:47:58,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680757921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:47:58,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348937681] [2024-11-28 03:47:58,273 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:47:58,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:47:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:47:58,274 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:47:58,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 03:47:58,773 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:47:58,773 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:47:58,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 223 conjuncts are in the unsatisfiable core [2024-11-28 03:47:58,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:47:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 946 proven. 1400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:47:59,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:48:01,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:48:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 946 proven. 1400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:48:02,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348937681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:48:02,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:48:02,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 83 [2024-11-28 03:48:02,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404463023] [2024-11-28 03:48:02,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:48:02,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-28 03:48:02,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:48:02,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-28 03:48:02,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=6269, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 03:48:02,270 INFO L87 Difference]: Start difference. First operand 672 states and 727 transitions. Second operand has 84 states, 83 states have (on average 4.253012048192771) internal successors, (353), 84 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:48:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:48:09,530 INFO L93 Difference]: Finished difference Result 825 states and 882 transitions. [2024-11-28 03:48:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-28 03:48:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 4.253012048192771) internal successors, (353), 84 states have internal predecessors, (353), 0 states have call successors, (0), 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 224 [2024-11-28 03:48:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:48:09,532 INFO L225 Difference]: With dead ends: 825 [2024-11-28 03:48:09,532 INFO L226 Difference]: Without dead ends: 825 [2024-11-28 03:48:09,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 393 SyntacticMatches, 24 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4217 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1547, Invalid=16009, Unknown=0, NotChecked=0, Total=17556 [2024-11-28 03:48:09,534 INFO L435 NwaCegarLoop]: 153 mSDtfsCounter, 785 mSDsluCounter, 4872 mSDsCounter, 0 mSdLazyCounter, 6239 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 5025 SdHoareTripleChecker+Invalid, 6239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:48:09,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 5025 Invalid, 6239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6239 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-28 03:48:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2024-11-28 03:48:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 687. [2024-11-28 03:48:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.0845481049562682) internal successors, (744), 686 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:48:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 744 transitions. [2024-11-28 03:48:09,546 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 744 transitions. Word has length 224 [2024-11-28 03:48:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:48:09,547 INFO L471 AbstractCegarLoop]: Abstraction has 687 states and 744 transitions. [2024-11-28 03:48:09,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 4.253012048192771) internal successors, (353), 84 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:48:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 744 transitions. [2024-11-28 03:48:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-28 03:48:09,549 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:48:09,549 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:48:09,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-28 03:48:09,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:48:09,750 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:48:09,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:48:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1429785530, now seen corresponding path program 41 times [2024-11-28 03:48:09,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:48:09,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886063480] [2024-11-28 03:48:09,751 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:48:09,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:48:09,933 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2024-11-28 03:48:09,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:48:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 48 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:48:14,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:48:14,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886063480] [2024-11-28 03:48:14,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886063480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:48:14,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671376622] [2024-11-28 03:48:14,331 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:48:14,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:48:14,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:48:14,333 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:48:14,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 03:48:15,486 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2024-11-28 03:48:15,486 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:48:15,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 248 conjuncts are in the unsatisfiable core [2024-11-28 03:48:15,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:48:15,516 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 [2024-11-28 03:48:17,764 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 14 treesize of output 10 [2024-11-28 03:48:29,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:48:29,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2024-11-28 03:48:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 946 proven. 1507 refuted. 10 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:48:30,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:48:35,967 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 13 [2024-11-28 03:48:35,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:48:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 946 proven. 1517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:48:43,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671376622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:48:43,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:48:43,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 57, 57] total 175 [2024-11-28 03:48:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469669491] [2024-11-28 03:48:43,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:48:43,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2024-11-28 03:48:43,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:48:43,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2024-11-28 03:48:43,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2276, Invalid=28172, Unknown=2, NotChecked=0, Total=30450 [2024-11-28 03:48:43,591 INFO L87 Difference]: Start difference. First operand 687 states and 744 transitions. Second operand has 175 states, 175 states have (on average 3.88) internal successors, (679), 175 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:50:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:50:37,593 INFO L93 Difference]: Finished difference Result 1380 states and 1487 transitions. [2024-11-28 03:50:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-11-28 03:50:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 3.88) internal successors, (679), 175 states have internal predecessors, (679), 0 states have call successors, (0), 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 229 [2024-11-28 03:50:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:50:37,595 INFO L225 Difference]: With dead ends: 1380 [2024-11-28 03:50:37,595 INFO L226 Difference]: Without dead ends: 861 [2024-11-28 03:50:37,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22279 ImplicationChecksByTransitivity, 130.0s TimeCoverageRelationStatistics Valid=4850, Invalid=75520, Unknown=2, NotChecked=0, Total=80372 [2024-11-28 03:50:37,598 INFO L435 NwaCegarLoop]: 153 mSDtfsCounter, 2277 mSDsluCounter, 8306 mSDsCounter, 0 mSdLazyCounter, 11215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 8459 SdHoareTripleChecker+Invalid, 11216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:50:37,598 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2277 Valid, 8459 Invalid, 11216 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 11215 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2024-11-28 03:50:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2024-11-28 03:50:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 714. [2024-11-28 03:50:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 1.0841514726507715) internal successors, (773), 713 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:50:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 773 transitions. [2024-11-28 03:50:37,608 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 773 transitions. Word has length 229 [2024-11-28 03:50:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:50:37,608 INFO L471 AbstractCegarLoop]: Abstraction has 714 states and 773 transitions. [2024-11-28 03:50:37,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 3.88) internal successors, (679), 175 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:50:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 773 transitions. [2024-11-28 03:50:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2024-11-28 03:50:37,610 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:50:37,611 INFO L218 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:37,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 03:50:37,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:37,811 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:50:37,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:37,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1656652709, now seen corresponding path program 42 times [2024-11-28 03:50:37,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:50:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757654085] [2024-11-28 03:50:37,812 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:50:37,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:50:37,998 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-28 03:50:37,999 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:50:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 946 proven. 1732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:50:46,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:50:46,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757654085] [2024-11-28 03:50:46,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757654085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:50:46,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290355601] [2024-11-28 03:50:46,584 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:50:46,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:46,585 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:46,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 03:50:49,849 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-11-28 03:50:49,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:50:49,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 291 conjuncts are in the unsatisfiable core [2024-11-28 03:50:49,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:52,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:50:52,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:50:53,206 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:50:53,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:50:53,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-28 03:50:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 74 proven. 2604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:50:57,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:01,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-28 03:51:01,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-28 03:51:02,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 03:51:02,210 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 20 [2024-11-28 03:51:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 74 proven. 2604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:10,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290355601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:10,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:51:10,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 64, 64] total 193 [2024-11-28 03:51:10,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220768419] [2024-11-28 03:51:10,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:10,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-28 03:51:10,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:51:10,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-28 03:51:10,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=35720, Unknown=0, NotChecked=0, Total=37056 [2024-11-28 03:51:10,627 INFO L87 Difference]: Start difference. First operand 714 states and 773 transitions. Second operand has 193 states, 193 states have (on average 3.6424870466321244) internal successors, (703), 193 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:52,616 INFO L93 Difference]: Finished difference Result 1084 states and 1144 transitions. [2024-11-28 03:51:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2024-11-28 03:51:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.6424870466321244) internal successors, (703), 193 states have internal predecessors, (703), 0 states have call successors, (0), 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 238 [2024-11-28 03:51:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:52,618 INFO L225 Difference]: With dead ends: 1084 [2024-11-28 03:51:52,618 INFO L226 Difference]: Without dead ends: 953 [2024-11-28 03:51:52,622 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31948 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=6287, Invalid=114469, Unknown=0, NotChecked=0, Total=120756 [2024-11-28 03:51:52,622 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 112 mSDsluCounter, 6633 mSDsCounter, 0 mSdLazyCounter, 13795 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 6718 SdHoareTripleChecker+Invalid, 13845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 13795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:52,622 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 6718 Invalid, 13845 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 13795 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2024-11-28 03:51:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2024-11-28 03:51:52,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 828. [2024-11-28 03:51:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.0737605804111245) internal successors, (888), 827 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 888 transitions. [2024-11-28 03:51:52,666 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 888 transitions. Word has length 238 [2024-11-28 03:51:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:52,666 INFO L471 AbstractCegarLoop]: Abstraction has 828 states and 888 transitions. [2024-11-28 03:51:52,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.6424870466321244) internal successors, (703), 193 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:51:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 888 transitions. [2024-11-28 03:51:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2024-11-28 03:51:52,668 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:52,668 INFO L218 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:52,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:52,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-28 03:51:52,868 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-28 03:51:52,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1421379171, now seen corresponding path program 2 times [2024-11-28 03:51:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:51:52,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120275714] [2024-11-28 03:51:52,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:51:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:51:52,949 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:51:52,949 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 50 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:56,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:51:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120275714] [2024-11-28 03:51:56,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120275714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380094191] [2024-11-28 03:51:56,912 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:51:56,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:56,914 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:56,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5aff946e-f58a-4bf5-997f-03911d6669f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 03:51:57,386 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:51:57,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:57,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 268 conjuncts are in the unsatisfiable core [2024-11-28 03:51:57,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:59,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:51:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 50 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:51:59,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:00,196 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 13 [2024-11-28 03:52:00,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:52:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 50 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:52:00,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380094191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:00,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:52:00,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 59, 59] total 93 [2024-11-28 03:52:00,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479115482] [2024-11-28 03:52:00,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:00,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-28 03:52:00,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:52:00,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-28 03:52:00,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=8300, Unknown=0, NotChecked=0, Total=8556 [2024-11-28 03:52:00,537 INFO L87 Difference]: Start difference. First operand 828 states and 888 transitions. Second operand has 93 states, 93 states have (on average 3.78494623655914) internal successors, (352), 93 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)