./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.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_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/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_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/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_87a94fcd-5530-42c9-bdb9-9f0a76550948/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 a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:10:56,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:10:56,419 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:10:56,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:10:56,435 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:10:56,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:10:56,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:10:56,479 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:10:56,479 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:10:56,480 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:10:56,481 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:10:56,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:10:56,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:10:56,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:10:56,482 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:10:56,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:10:56,482 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:10:56,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:10:56,483 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:10:56,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:10:56,483 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:10:56,483 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:10:56,483 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:10:56,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:10:56,484 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:10:56,484 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:10:56,484 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:10:56,484 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:10:56,484 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:10:56,484 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:10:56,484 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:10:56,484 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:10:56,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:10:56,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:10:56,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:10:56,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:10:56,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:10:56,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:10:56,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:10:56,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:10:56,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:10:56,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:10:56,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:10:56,487 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:10:56,487 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:10:56,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:10:56,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:10:56,487 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_87a94fcd-5530-42c9-bdb9-9f0a76550948/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 -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2024-11-28 03:10:56,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:10:56,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:10:56,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:10:56,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:10:56,862 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:10:56,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-11-28 03:10:59,893 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/data/8621bee50/43d48d931abb4788ac7c852324dcfbd2/FLAGb354af48c [2024-11-28 03:11:00,219 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:11:00,220 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-11-28 03:11:00,232 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/data/8621bee50/43d48d931abb4788ac7c852324dcfbd2/FLAGb354af48c [2024-11-28 03:11:00,246 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/data/8621bee50/43d48d931abb4788ac7c852324dcfbd2 [2024-11-28 03:11:00,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:11:00,249 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:11:00,251 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:11:00,251 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:11:00,256 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:11:00,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e92bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00, skipping insertion in model container [2024-11-28 03:11:00,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,293 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:11:00,662 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 03:11:00,664 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 03:11:00,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:11:00,687 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:11:00,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:11:00,765 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:11:00,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00 WrapperNode [2024-11-28 03:11:00,767 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:11:00,769 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:11:00,769 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:11:00,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:11:00,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,820 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2024-11-28 03:11:00,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:11:00,825 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:11:00,825 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:11:00,825 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:11:00,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,840 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,854 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [4, 4]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [2, 4]. [2024-11-28 03:11:00,854 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,854 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,860 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,861 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,869 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:11:00,870 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:11:00,870 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:11:00,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:11:00,872 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (1/1) ... [2024-11-28 03:11:00,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:11:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:00,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:11:00,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:11:00,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:11:00,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:11:00,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:11:00,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:11:00,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:11:00,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:11:00,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:11:00,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:11:01,078 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:11:01,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:11:01,338 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-11-28 03:11:01,338 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:11:01,348 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:11:01,349 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:11:01,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:01 BoogieIcfgContainer [2024-11-28 03:11:01,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:11:01,352 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:11:01,352 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:11:01,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:11:01,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:11:00" (1/3) ... [2024-11-28 03:11:01,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a8bb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:11:01, skipping insertion in model container [2024-11-28 03:11:01,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:00" (2/3) ... [2024-11-28 03:11:01,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a8bb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:11:01, skipping insertion in model container [2024-11-28 03:11:01,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:01" (3/3) ... [2024-11-28 03:11:01,359 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2024-11-28 03:11:01,375 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:11:01,377 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrlcpy-alloca-1.i that has 1 procedures, 53 locations, 1 initial locations, 4 loop locations, and 17 error locations. [2024-11-28 03:11:01,419 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:11:01,431 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;@73472931, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:11:01,431 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-28 03:11:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 52 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 03:11:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:11:01,440 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:01,441 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:01,441 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:01,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-11-28 03:11:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:01,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886535713] [2024-11-28 03:11:01,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:01,712 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 03:11:01,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:01,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886535713] [2024-11-28 03:11:01,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886535713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:01,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:01,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149627055] [2024-11-28 03:11:01,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:01,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:01,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:01,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:01,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:01,769 INFO L87 Difference]: Start difference. First operand has 53 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 52 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) 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 03:11:01,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:01,853 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2024-11-28 03:11:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:01,857 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 03:11:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:01,865 INFO L225 Difference]: With dead ends: 69 [2024-11-28 03:11:01,865 INFO L226 Difference]: Without dead ends: 67 [2024-11-28 03:11:01,867 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 03:11:01,870 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 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 03:11:01,871 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-28 03:11:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2024-11-28 03:11:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 03:11:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-11-28 03:11:01,908 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 8 [2024-11-28 03:11:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:01,908 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-11-28 03:11:01,908 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 03:11:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-11-28 03:11:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:11:01,909 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:01,909 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:01,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:11:01,909 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:01,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:01,910 INFO L85 PathProgramCache]: Analyzing trace with hash 178583535, now seen corresponding path program 1 times [2024-11-28 03:11:01,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:01,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696217114] [2024-11-28 03:11:01,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:01,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:02,071 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 03:11:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:02,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696217114] [2024-11-28 03:11:02,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696217114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:02,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:02,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:11:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6921982] [2024-11-28 03:11:02,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:02,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:11:02,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:02,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:11:02,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:11:02,075 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 03:11:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:02,142 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-11-28 03:11:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:11:02,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 03:11:02,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:02,144 INFO L225 Difference]: With dead ends: 52 [2024-11-28 03:11:02,145 INFO L226 Difference]: Without dead ends: 52 [2024-11-28 03:11:02,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:11:02,147 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:02,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-28 03:11:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-28 03:11:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-28 03:11:02,159 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 8 [2024-11-28 03:11:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:02,159 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-28 03:11:02,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 03:11:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-28 03:11:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:11:02,160 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:02,160 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:02,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:11:02,160 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:02,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-11-28 03:11:02,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:02,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29406375] [2024-11-28 03:11:02,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:02,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:02,485 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 03:11:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29406375] [2024-11-28 03:11:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29406375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239528207] [2024-11-28 03:11:02,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:02,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:11:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:02,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:11:02,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:02,488 INFO L87 Difference]: Start difference. First operand 52 states and 62 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 03:11:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:02,602 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-11-28 03:11:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:02,602 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 03:11:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:02,603 INFO L225 Difference]: With dead ends: 56 [2024-11-28 03:11:02,603 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 03:11:02,603 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 03:11:02,604 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 28 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:02,604 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 03:11:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-28 03:11:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.65) internal successors, (66), 54 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 03:11:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-28 03:11:02,609 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 8 [2024-11-28 03:11:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:02,609 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-28 03:11:02,609 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 03:11:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-28 03:11:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:11:02,610 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:02,610 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:02,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:11:02,610 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:02,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:02,611 INFO L85 PathProgramCache]: Analyzing trace with hash 631530201, now seen corresponding path program 1 times [2024-11-28 03:11:02,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:02,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689697714] [2024-11-28 03:11:02,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:02,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:02,662 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 03:11:02,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:02,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689697714] [2024-11-28 03:11:02,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689697714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:02,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:02,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:02,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370649425] [2024-11-28 03:11:02,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:02,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:02,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:02,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:02,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:02,664 INFO L87 Difference]: Start difference. First operand 55 states and 66 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 03:11:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:02,728 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2024-11-28 03:11:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:02,728 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 03:11:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:02,729 INFO L225 Difference]: With dead ends: 74 [2024-11-28 03:11:02,729 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 03:11:02,730 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 03:11:02,730 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:02,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 03:11:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2024-11-28 03:11:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-11-28 03:11:02,747 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 10 [2024-11-28 03:11:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:02,747 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-11-28 03:11:02,748 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 03:11:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-11-28 03:11:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:11:02,748 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:02,748 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:02,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:11:02,749 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:02,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:02,753 INFO L85 PathProgramCache]: Analyzing trace with hash 631532379, now seen corresponding path program 1 times [2024-11-28 03:11:02,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:02,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102827136] [2024-11-28 03:11:02,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:02,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:02,852 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 03:11:02,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:02,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102827136] [2024-11-28 03:11:02,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102827136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:02,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:02,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:11:02,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185808974] [2024-11-28 03:11:02,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:02,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:11:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:02,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:11:02,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:11:02,854 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:02,896 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-11-28 03:11:02,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:11:02,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 03:11:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:02,897 INFO L225 Difference]: With dead ends: 65 [2024-11-28 03:11:02,897 INFO L226 Difference]: Without dead ends: 65 [2024-11-28 03:11:02,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:11:02,900 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:02,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 73 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-28 03:11:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-28 03:11:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 64 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 03:11:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2024-11-28 03:11:02,905 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 10 [2024-11-28 03:11:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:02,906 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2024-11-28 03:11:02,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2024-11-28 03:11:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:11:02,906 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:02,906 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:02,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:11:02,907 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:02,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash 631532380, now seen corresponding path program 1 times [2024-11-28 03:11:02,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:02,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041964230] [2024-11-28 03:11:02,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:03,178 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 03:11:03,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:03,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041964230] [2024-11-28 03:11:03,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041964230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:03,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:03,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:11:03,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680915051] [2024-11-28 03:11:03,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:03,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:03,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:03,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:03,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:03,179 INFO L87 Difference]: Start difference. First operand 65 states and 79 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 03:11:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:03,262 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2024-11-28 03:11:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:03,263 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 03:11:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:03,263 INFO L225 Difference]: With dead ends: 71 [2024-11-28 03:11:03,263 INFO L226 Difference]: Without dead ends: 71 [2024-11-28 03:11:03,264 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 03:11:03,264 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:03,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-28 03:11:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2024-11-28 03:11:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.5) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-11-28 03:11:03,276 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 10 [2024-11-28 03:11:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:03,277 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-11-28 03:11:03,277 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 03:11:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-11-28 03:11:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:11:03,277 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:03,277 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:03,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:11:03,278 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:03,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:03,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1888429732, now seen corresponding path program 1 times [2024-11-28 03:11:03,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:03,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244295961] [2024-11-28 03:11:03,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:03,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:03,539 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 03:11:03,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:03,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244295961] [2024-11-28 03:11:03,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244295961] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:03,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:03,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:11:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681957696] [2024-11-28 03:11:03,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:03,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:11:03,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:03,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:11:03,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:11:03,541 INFO L87 Difference]: Start difference. First operand 67 states and 81 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 03:11:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:03,647 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2024-11-28 03:11:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:11:03,647 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 03:11:03,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:03,648 INFO L225 Difference]: With dead ends: 71 [2024-11-28 03:11:03,648 INFO L226 Difference]: Without dead ends: 71 [2024-11-28 03:11:03,648 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 03:11:03,649 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:03,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 111 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-28 03:11:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-28 03:11:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 69 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 03:11:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-11-28 03:11:03,660 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 10 [2024-11-28 03:11:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:03,660 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-11-28 03:11:03,660 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 03:11:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-11-28 03:11:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:11:03,663 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:03,664 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:03,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:11:03,664 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:03,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:03,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1888427554, now seen corresponding path program 1 times [2024-11-28 03:11:03,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:03,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823830566] [2024-11-28 03:11:03,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:03,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:03,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823830566] [2024-11-28 03:11:03,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823830566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:03,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:03,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:11:03,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719950584] [2024-11-28 03:11:03,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:03,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:11:03,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:03,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:11:03,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:11:03,957 INFO L87 Difference]: Start difference. First operand 70 states and 85 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 03:11:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:04,036 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2024-11-28 03:11:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:11:04,037 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 03:11:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:04,038 INFO L225 Difference]: With dead ends: 76 [2024-11-28 03:11:04,038 INFO L226 Difference]: Without dead ends: 76 [2024-11-28 03:11:04,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:11:04,039 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 43 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:04,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 113 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-28 03:11:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2024-11-28 03:11:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 69 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 03:11:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-11-28 03:11:04,043 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 10 [2024-11-28 03:11:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:04,044 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-11-28 03:11:04,044 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 03:11:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-11-28 03:11:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 03:11:04,045 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:04,045 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:04,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:11:04,045 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:04,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:04,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1897332705, now seen corresponding path program 1 times [2024-11-28 03:11:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:04,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048963543] [2024-11-28 03:11:04,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:04,160 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 03:11:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:04,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048963543] [2024-11-28 03:11:04,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048963543] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:04,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:04,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:11:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943780918] [2024-11-28 03:11:04,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:04,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:04,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:04,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:04,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:04,162 INFO L87 Difference]: Start difference. First operand 70 states and 85 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 03:11:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:04,221 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2024-11-28 03:11:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:04,222 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 03:11:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:04,222 INFO L225 Difference]: With dead ends: 87 [2024-11-28 03:11:04,222 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 03:11:04,222 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 03:11:04,223 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:04,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 03:11:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2024-11-28 03:11:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 84 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 03:11:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2024-11-28 03:11:04,228 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 11 [2024-11-28 03:11:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:04,229 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2024-11-28 03:11:04,229 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 03:11:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2024-11-28 03:11:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 03:11:04,229 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:04,230 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:04,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:11:04,230 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:04,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1217274335, now seen corresponding path program 1 times [2024-11-28 03:11:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:04,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997414204] [2024-11-28 03:11:04,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:04,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:04,397 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 03:11:04,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:04,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997414204] [2024-11-28 03:11:04,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997414204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:04,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:04,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:04,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90090691] [2024-11-28 03:11:04,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:04,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:11:04,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:04,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:11:04,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:04,399 INFO L87 Difference]: Start difference. First operand 85 states and 104 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 03:11:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:04,470 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2024-11-28 03:11:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:04,470 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 03:11:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:04,471 INFO L225 Difference]: With dead ends: 104 [2024-11-28 03:11:04,471 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 03:11:04,471 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 03:11:04,472 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:04,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 109 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 03:11:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2024-11-28 03:11:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 84 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 03:11:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2024-11-28 03:11:04,477 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 11 [2024-11-28 03:11:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:04,477 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2024-11-28 03:11:04,477 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 03:11:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2024-11-28 03:11:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:11:04,478 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:04,478 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:04,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 03:11:04,478 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:04,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-11-28 03:11:04,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:04,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566705542] [2024-11-28 03:11:04,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:04,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:04,719 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 03:11:04,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:04,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566705542] [2024-11-28 03:11:04,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566705542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:04,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004851760] [2024-11-28 03:11:04,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:04,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:04,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:04,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:04,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:11:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:04,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:11:04,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:04,884 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 03:11:04,894 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 03:11:05,206 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 03:11:05,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:05,504 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 03:11:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004851760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:05,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:05,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-28 03:11:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883232942] [2024-11-28 03:11:05,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:05,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:11:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:05,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:11:05,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:11:05,507 INFO L87 Difference]: Start difference. First operand 85 states and 104 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 03:11:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:05,767 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2024-11-28 03:11:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:11:05,767 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 03:11:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:05,768 INFO L225 Difference]: With dead ends: 88 [2024-11-28 03:11:05,768 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 03:11:05,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:11:05,769 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:05,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 205 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 03:11:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2024-11-28 03:11:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.4411764705882353) internal successors, (98), 79 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2024-11-28 03:11:05,774 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 12 [2024-11-28 03:11:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:05,774 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2024-11-28 03:11:05,774 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 03:11:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2024-11-28 03:11:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:11:05,775 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:05,775 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:05,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:11:05,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:11:05,980 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:05,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:05,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1315344789, now seen corresponding path program 1 times [2024-11-28 03:11:05,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:05,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541861755] [2024-11-28 03:11:05,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:05,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:06,315 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 03:11:06,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:06,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541861755] [2024-11-28 03:11:06,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541861755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:06,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011355621] [2024-11-28 03:11:06,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:06,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:06,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:06,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:11:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:06,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:11:06,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:06,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:11:06,447 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 03:11:06,461 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 03:11:06,764 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 03:11:06,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:07,075 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:11:07,107 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 03:11:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011355621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:07,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:07,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-28 03:11:07,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322149084] [2024-11-28 03:11:07,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:07,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:11:07,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:07,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:11:07,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:11:07,109 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:07,407 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2024-11-28 03:11:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:11:07,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:11:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:07,408 INFO L225 Difference]: With dead ends: 83 [2024-11-28 03:11:07,408 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 03:11:07,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:11:07,409 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 51 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:07,410 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 188 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:11:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 03:11:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2024-11-28 03:11:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.4375) internal successors, (92), 74 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 03:11:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2024-11-28 03:11:07,414 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 14 [2024-11-28 03:11:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:07,415 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2024-11-28 03:11:07,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2024-11-28 03:11:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:11:07,416 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:07,416 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:07,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:11:07,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:11:07,621 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:07,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1315346967, now seen corresponding path program 1 times [2024-11-28 03:11:07,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:07,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021455931] [2024-11-28 03:11:07,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:07,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:07,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:07,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021455931] [2024-11-28 03:11:07,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021455931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:07,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963316685] [2024-11-28 03:11:07,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:07,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:07,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:08,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:11:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:08,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:11:08,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:08,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:11:08,118 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 03:11:08,128 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 03:11:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:08,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:08,473 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:11:08,509 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 03:11:08,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963316685] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:08,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:11:08,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-11-28 03:11:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164414965] [2024-11-28 03:11:08,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:08,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:11:08,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:08,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:11:08,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:11:08,512 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 03:11:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:08,671 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2024-11-28 03:11:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:11:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 03:11:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:08,672 INFO L225 Difference]: With dead ends: 74 [2024-11-28 03:11:08,672 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 03:11:08,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:11:08,673 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:08,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 159 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 03:11:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2024-11-28 03:11:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-11-28 03:11:08,677 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 14 [2024-11-28 03:11:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:08,677 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-11-28 03:11:08,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 03:11:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-11-28 03:11:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 03:11:08,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:08,678 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:08,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:11:08,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:11:08,883 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:08,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1907850696, now seen corresponding path program 1 times [2024-11-28 03:11:08,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:08,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360258515] [2024-11-28 03:11:08,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:08,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:09,156 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 03:11:09,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360258515] [2024-11-28 03:11:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360258515] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:09,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:09,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:11:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763887786] [2024-11-28 03:11:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:09,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:11:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:09,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:11:09,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:11:09,159 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 03:11:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:09,212 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-11-28 03:11:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:11:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-11-28 03:11:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:09,214 INFO L225 Difference]: With dead ends: 67 [2024-11-28 03:11:09,215 INFO L226 Difference]: Without dead ends: 67 [2024-11-28 03:11:09,215 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 03:11:09,216 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:09,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-28 03:11:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2024-11-28 03:11:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.434782608695652) internal successors, (66), 54 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 03:11:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-28 03:11:09,221 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 15 [2024-11-28 03:11:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:09,222 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-28 03:11:09,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 03:11:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-28 03:11:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:11:09,222 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:09,223 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:09,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 03:11:09,223 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:09,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1886502109, now seen corresponding path program 1 times [2024-11-28 03:11:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041795126] [2024-11-28 03:11:09,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:09,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:09,300 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 03:11:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041795126] [2024-11-28 03:11:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041795126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:09,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:09,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:11:09,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400370099] [2024-11-28 03:11:09,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:09,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:09,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:09,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:09,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:09,303 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 03:11:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:09,360 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2024-11-28 03:11:09,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:09,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 03:11:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:09,361 INFO L225 Difference]: With dead ends: 61 [2024-11-28 03:11:09,361 INFO L226 Difference]: Without dead ends: 61 [2024-11-28 03:11:09,362 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:09,363 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:09,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 77 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-28 03:11:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-11-28 03:11:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 03:11:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-28 03:11:09,369 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 16 [2024-11-28 03:11:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:09,369 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-28 03:11:09,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 03:11:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-28 03:11:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:11:09,370 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:09,371 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:09,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:11:09,371 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:09,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:09,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1886502108, now seen corresponding path program 1 times [2024-11-28 03:11:09,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:09,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739290820] [2024-11-28 03:11:09,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:09,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:09,497 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 03:11:09,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:09,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739290820] [2024-11-28 03:11:09,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739290820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:09,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:09,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:09,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607918670] [2024-11-28 03:11:09,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:09,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:09,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:09,499 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:09,499 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 03:11:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:09,538 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-11-28 03:11:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:09,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 03:11:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:09,540 INFO L225 Difference]: With dead ends: 60 [2024-11-28 03:11:09,540 INFO L226 Difference]: Without dead ends: 60 [2024-11-28 03:11:09,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 03:11:09,541 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:09,541 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 127 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-28 03:11:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-11-28 03:11:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 03:11:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-11-28 03:11:09,545 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 16 [2024-11-28 03:11:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:09,545 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-11-28 03:11:09,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 03:11:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-11-28 03:11:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:11:09,546 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:09,546 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:09,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:11:09,546 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:09,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:09,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1821659174, now seen corresponding path program 1 times [2024-11-28 03:11:09,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:09,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646677445] [2024-11-28 03:11:09,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:09,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:09,668 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 03:11:09,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:09,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646677445] [2024-11-28 03:11:09,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646677445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:09,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:09,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:11:09,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096802271] [2024-11-28 03:11:09,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:09,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:11:09,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:09,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:11:09,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:09,670 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 03:11:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:09,708 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2024-11-28 03:11:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 03:11:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:09,710 INFO L225 Difference]: With dead ends: 60 [2024-11-28 03:11:09,710 INFO L226 Difference]: Without dead ends: 60 [2024-11-28 03:11:09,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:09,710 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:09,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-28 03:11:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-11-28 03:11:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.391304347826087) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 03:11:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-11-28 03:11:09,714 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 16 [2024-11-28 03:11:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:09,715 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-11-28 03:11:09,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 03:11:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-11-28 03:11:09,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 03:11:09,716 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:09,718 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 03:11:09,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 03:11:09,718 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:09,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1622210693, now seen corresponding path program 1 times [2024-11-28 03:11:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124667] [2024-11-28 03:11:09,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:09,813 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 03:11:09,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:09,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124667] [2024-11-28 03:11:09,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124667] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:09,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:09,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:09,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452427157] [2024-11-28 03:11:09,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:09,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:11:09,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:09,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:11:09,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:09,815 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 03:11:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:09,884 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2024-11-28 03:11:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 03:11:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:09,885 INFO L225 Difference]: With dead ends: 53 [2024-11-28 03:11:09,886 INFO L226 Difference]: Without dead ends: 53 [2024-11-28 03:11:09,886 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 03:11:09,887 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:09,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-28 03:11:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-28 03:11:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 52 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 03:11:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2024-11-28 03:11:09,890 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 17 [2024-11-28 03:11:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:09,890 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2024-11-28 03:11:09,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 03:11:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2024-11-28 03:11:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 03:11:09,891 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:09,891 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 03:11:09,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 03:11:09,891 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:09,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1622210694, now seen corresponding path program 1 times [2024-11-28 03:11:09,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:09,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427316818] [2024-11-28 03:11:09,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:09,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:10,102 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 03:11:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427316818] [2024-11-28 03:11:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427316818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:10,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:10,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:11:10,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133286840] [2024-11-28 03:11:10,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:10,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:11:10,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:10,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:11:10,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:11:10,105 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 03:11:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:10,214 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2024-11-28 03:11:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:11:10,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 03:11:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:10,215 INFO L225 Difference]: With dead ends: 79 [2024-11-28 03:11:10,215 INFO L226 Difference]: Without dead ends: 79 [2024-11-28 03:11:10,215 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 03:11:10,216 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:10,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-28 03:11:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2024-11-28 03:11:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.36) internal successors, (68), 56 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 03:11:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-11-28 03:11:10,219 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 17 [2024-11-28 03:11:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:10,219 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-11-28 03:11:10,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 03:11:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-11-28 03:11:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 03:11:10,220 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:10,220 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:10,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 03:11:10,220 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:10,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1251076023, now seen corresponding path program 1 times [2024-11-28 03:11:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:10,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953534961] [2024-11-28 03:11:10,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:10,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:10,294 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 03:11:10,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:10,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953534961] [2024-11-28 03:11:10,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953534961] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:10,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:10,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:10,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943243873] [2024-11-28 03:11:10,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:10,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:11:10,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:10,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:11:10,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:10,295 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:10,366 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-11-28 03:11:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 03:11:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:10,367 INFO L225 Difference]: With dead ends: 63 [2024-11-28 03:11:10,367 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 03:11:10,368 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 03:11:10,368 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:10,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 100 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 03:11:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-11-28 03:11:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.34) internal successors, (67), 55 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 03:11:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-11-28 03:11:10,371 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 18 [2024-11-28 03:11:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:10,371 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-11-28 03:11:10,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-11-28 03:11:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 03:11:10,372 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:10,372 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:10,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 03:11:10,373 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:10,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1251076022, now seen corresponding path program 1 times [2024-11-28 03:11:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817430313] [2024-11-28 03:11:10,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:10,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:10,548 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 03:11:10,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:10,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817430313] [2024-11-28 03:11:10,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817430313] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:10,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:11:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22864810] [2024-11-28 03:11:10,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:10,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:11:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:10,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:11:10,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:11:10,550 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:10,672 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2024-11-28 03:11:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:11:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 03:11:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:10,674 INFO L225 Difference]: With dead ends: 72 [2024-11-28 03:11:10,674 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 03:11:10,675 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 03:11:10,675 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:10,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 173 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 03:11:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2024-11-28 03:11:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 59 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 03:11:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2024-11-28 03:11:10,679 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 18 [2024-11-28 03:11:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:10,680 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2024-11-28 03:11:10,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2024-11-28 03:11:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:11:10,681 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:10,681 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:10,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 03:11:10,681 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:10,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash -125386935, now seen corresponding path program 1 times [2024-11-28 03:11:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:10,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208498833] [2024-11-28 03:11:10,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:10,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:10,813 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 03:11:10,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208498833] [2024-11-28 03:11:10,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208498833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:10,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:10,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:11:10,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379318825] [2024-11-28 03:11:10,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:10,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:10,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:10,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:10,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:10,815 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:11:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:10,853 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-11-28 03:11:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-11-28 03:11:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:10,854 INFO L225 Difference]: With dead ends: 59 [2024-11-28 03:11:10,854 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 03:11:10,854 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 03:11:10,856 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:10,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 70 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 03:11:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-28 03:11:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 55 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 03:11:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-11-28 03:11:10,859 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 19 [2024-11-28 03:11:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:10,860 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-11-28 03:11:10,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:11:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-11-28 03:11:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:11:10,860 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:10,861 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:10,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 03:11:10,861 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:10,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:10,862 INFO L85 PathProgramCache]: Analyzing trace with hash -126181297, now seen corresponding path program 1 times [2024-11-28 03:11:10,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:10,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920180406] [2024-11-28 03:11:10,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:10,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:10,932 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 03:11:10,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920180406] [2024-11-28 03:11:10,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920180406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:10,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:10,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:10,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738003333] [2024-11-28 03:11:10,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:10,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:11:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:10,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:11:10,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:10,933 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:11:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:10,988 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-11-28 03:11:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-11-28 03:11:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:10,990 INFO L225 Difference]: With dead ends: 55 [2024-11-28 03:11:10,990 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 03:11:10,990 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 03:11:10,991 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:10,991 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 03:11:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-28 03:11:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 54 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 03:11:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-28 03:11:10,994 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 19 [2024-11-28 03:11:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:10,995 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-28 03:11:10,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:11:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-28 03:11:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:11:10,995 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:10,996 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:10,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 03:11:10,996 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:10,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash -126181296, now seen corresponding path program 1 times [2024-11-28 03:11:10,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:10,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707040707] [2024-11-28 03:11:10,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:11,088 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 03:11:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707040707] [2024-11-28 03:11:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707040707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:11,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417710451] [2024-11-28 03:11:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:11,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:11,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:11,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:11,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:11,090 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:11:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:11,111 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2024-11-28 03:11:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:11,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-11-28 03:11:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:11,113 INFO L225 Difference]: With dead ends: 77 [2024-11-28 03:11:11,113 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 03:11:11,113 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 03:11:11,114 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 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 03:11:11,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 03:11:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-11-28 03:11:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 03:11:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-11-28 03:11:11,118 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 19 [2024-11-28 03:11:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:11,118 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-11-28 03:11:11,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:11:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-11-28 03:11:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:11:11,119 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:11,119 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:11,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-28 03:11:11,120 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:11,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1147249650, now seen corresponding path program 1 times [2024-11-28 03:11:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:11,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732248066] [2024-11-28 03:11:11,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:11,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:11,259 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 03:11:11,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:11,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732248066] [2024-11-28 03:11:11,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732248066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:11,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:11,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:11:11,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850646105] [2024-11-28 03:11:11,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:11,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:11:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:11,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:11:11,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:11:11,263 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:11:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:11,305 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2024-11-28 03:11:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:11:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-11-28 03:11:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:11,306 INFO L225 Difference]: With dead ends: 75 [2024-11-28 03:11:11,306 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 03:11:11,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:11:11,307 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:11,307 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 03:11:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2024-11-28 03:11:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 03:11:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-28 03:11:11,314 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 19 [2024-11-28 03:11:11,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:11,314 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-28 03:11:11,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:11:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-28 03:11:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 03:11:11,314 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:11,315 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:11,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-28 03:11:11,315 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:11,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 383190491, now seen corresponding path program 1 times [2024-11-28 03:11:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:11,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415486450] [2024-11-28 03:11:11,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:11,552 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 03:11:11,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:11,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415486450] [2024-11-28 03:11:11,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415486450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:11,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:11,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:11:11,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611777394] [2024-11-28 03:11:11,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:11,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:11:11,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:11,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:11:11,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:11:11,556 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:11,673 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2024-11-28 03:11:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:11:11,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-28 03:11:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:11,674 INFO L225 Difference]: With dead ends: 73 [2024-11-28 03:11:11,674 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 03:11:11,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:11:11,675 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:11,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 135 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 03:11:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2024-11-28 03:11:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 56 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 03:11:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-11-28 03:11:11,681 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 20 [2024-11-28 03:11:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:11,681 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-11-28 03:11:11,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-11-28 03:11:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:11:11,682 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:11,682 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:11,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-28 03:11:11,683 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:11,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1530991722, now seen corresponding path program 1 times [2024-11-28 03:11:11,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:11,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376337149] [2024-11-28 03:11:11,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:11,793 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 03:11:11,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:11,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376337149] [2024-11-28 03:11:11,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376337149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:11,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:11,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:11:11,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743194848] [2024-11-28 03:11:11,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:11,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:11:11,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:11,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:11:11,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:11,795 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 03:11:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:11,833 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2024-11-28 03:11:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 03:11:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:11,834 INFO L225 Difference]: With dead ends: 64 [2024-11-28 03:11:11,834 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 03:11:11,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:11,835 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:11,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 03:11:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-28 03:11:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 63 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 03:11:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2024-11-28 03:11:11,838 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 22 [2024-11-28 03:11:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:11,841 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2024-11-28 03:11:11,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 03:11:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2024-11-28 03:11:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:11:11,841 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:11,841 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:11,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-28 03:11:11,842 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:11,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:11,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1075031832, now seen corresponding path program 1 times [2024-11-28 03:11:11,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:11,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195864644] [2024-11-28 03:11:11,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:11,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:11,999 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 03:11:11,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195864644] [2024-11-28 03:11:11,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195864644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:11,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:11,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:11:12,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867587582] [2024-11-28 03:11:12,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:12,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:11:12,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:12,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:11:12,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:11:12,001 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 03:11:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:12,071 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-11-28 03:11:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:11:12,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 03:11:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:12,072 INFO L225 Difference]: With dead ends: 75 [2024-11-28 03:11:12,072 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 03:11:12,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:11:12,073 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 30 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:12,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 126 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 03:11:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2024-11-28 03:11:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-11-28 03:11:12,078 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 22 [2024-11-28 03:11:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:12,078 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-11-28 03:11:12,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 03:11:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-11-28 03:11:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 03:11:12,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:12,080 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] [2024-11-28 03:11:12,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-28 03:11:12,080 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:12,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash -395105928, now seen corresponding path program 1 times [2024-11-28 03:11:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:12,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639575693] [2024-11-28 03:11:12,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:12,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:12,299 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 03:11:12,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:12,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639575693] [2024-11-28 03:11:12,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639575693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:12,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:12,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:11:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914576337] [2024-11-28 03:11:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:12,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:11:12,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:12,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:11:12,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:11:12,301 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 03:11:12,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:12,356 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2024-11-28 03:11:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:11:12,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2024-11-28 03:11:12,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:12,357 INFO L225 Difference]: With dead ends: 94 [2024-11-28 03:11:12,358 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 03:11:12,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:11:12,358 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:12,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 192 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 03:11:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-11-28 03:11:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 75 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 03:11:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2024-11-28 03:11:12,362 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 23 [2024-11-28 03:11:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:12,362 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2024-11-28 03:11:12,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 03:11:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2024-11-28 03:11:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 03:11:12,363 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:12,363 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] [2024-11-28 03:11:12,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-28 03:11:12,363 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:12,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash 27595898, now seen corresponding path program 1 times [2024-11-28 03:11:12,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:12,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042051459] [2024-11-28 03:11:12,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:12,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:12,629 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 03:11:12,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:12,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042051459] [2024-11-28 03:11:12,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042051459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:12,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:12,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:11:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163684685] [2024-11-28 03:11:12,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:12,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:11:12,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:12,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:11:12,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:11:12,631 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 03:11:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:12,718 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2024-11-28 03:11:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:11:12,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2024-11-28 03:11:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:12,720 INFO L225 Difference]: With dead ends: 113 [2024-11-28 03:11:12,720 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 03:11:12,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:11:12,721 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:12,721 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 203 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 03:11:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2024-11-28 03:11:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 77 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 03:11:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2024-11-28 03:11:12,725 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 23 [2024-11-28 03:11:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:12,725 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2024-11-28 03:11:12,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 03:11:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2024-11-28 03:11:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 03:11:12,726 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:12,726 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:12,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-28 03:11:12,727 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:12,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:12,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2137119185, now seen corresponding path program 1 times [2024-11-28 03:11:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:12,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805445640] [2024-11-28 03:11:12,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:12,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:12,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805445640] [2024-11-28 03:11:12,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805445640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:12,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285495346] [2024-11-28 03:11:12,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:12,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:12,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:13,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:11:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:13,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:11:13,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:13,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:13,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285495346] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:13,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:11:13,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 5] total 14 [2024-11-28 03:11:13,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234051982] [2024-11-28 03:11:13,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:13,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:13,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:13,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:13,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:11:13,274 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:13,290 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2024-11-28 03:11:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:11:13,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-28 03:11:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:13,291 INFO L225 Difference]: With dead ends: 79 [2024-11-28 03:11:13,291 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 03:11:13,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:11:13,292 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:13,292 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 66 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:11:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 03:11:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-28 03:11:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 77 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 03:11:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2024-11-28 03:11:13,298 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 26 [2024-11-28 03:11:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:13,299 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2024-11-28 03:11:13,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2024-11-28 03:11:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 03:11:13,299 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:13,299 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:13,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:13,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 03:11:13,504 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:13,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1827201302, now seen corresponding path program 1 times [2024-11-28 03:11:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:13,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339267415] [2024-11-28 03:11:13,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:13,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:13,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:13,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339267415] [2024-11-28 03:11:13,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339267415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:13,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059085300] [2024-11-28 03:11:13,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:13,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:13,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:13,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:11:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:13,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:11:13,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:13,916 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 03:11:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:14,005 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:11:14,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059085300] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:14,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:11:14,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2024-11-28 03:11:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106611483] [2024-11-28 03:11:14,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:14,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:11:14,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:14,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:11:14,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:11:14,006 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 03:11:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:14,074 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-11-28 03:11:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:11:14,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2024-11-28 03:11:14,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:14,076 INFO L225 Difference]: With dead ends: 95 [2024-11-28 03:11:14,076 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 03:11:14,076 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:11:14,076 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:14,077 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 03:11:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-28 03:11:14,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1830985915492958) 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 03:11:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-11-28 03:11:14,086 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 27 [2024-11-28 03:11:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:14,086 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-11-28 03:11:14,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 03:11:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-11-28 03:11:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 03:11:14,090 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:14,090 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:14,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:14,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:14,295 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:14,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1961718177, now seen corresponding path program 1 times [2024-11-28 03:11:14,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:14,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598247872] [2024-11-28 03:11:14,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:14,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:14,666 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 03:11:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598247872] [2024-11-28 03:11:14,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598247872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69649910] [2024-11-28 03:11:14,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:14,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:14,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:11:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:14,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:11:14,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:14,800 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 03:11:14,958 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 03:11:14,958 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:15,309 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 03:11:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69649910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:15,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:15,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-28 03:11:15,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349990297] [2024-11-28 03:11:15,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:15,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:11:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:15,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:11:15,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:11:15,312 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 03:11:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:15,693 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-11-28 03:11:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:11:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 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 27 [2024-11-28 03:11:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:15,694 INFO L225 Difference]: With dead ends: 95 [2024-11-28 03:11:15,694 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 03:11:15,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:11:15,695 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 44 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:15,695 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 367 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 03:11:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2024-11-28 03:11:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.180722891566265) internal successors, (98), 86 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2024-11-28 03:11:15,700 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 27 [2024-11-28 03:11:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:15,700 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2024-11-28 03:11:15,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 03:11:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2024-11-28 03:11:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 03:11:15,701 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:15,701 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:15,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:15,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 03:11:15,902 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:15,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1967749912, now seen corresponding path program 1 times [2024-11-28 03:11:15,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:15,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75754204] [2024-11-28 03:11:15,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:15,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:16,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75754204] [2024-11-28 03:11:16,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75754204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773567967] [2024-11-28 03:11:16,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:16,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:16,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:16,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:11:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:16,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:11:16,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:16,277 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 03:11:16,523 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:11:16,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:11:16,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2024-11-28 03:11:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:16,577 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:11:16,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773567967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:16,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:11:16,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-11-28 03:11:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490505817] [2024-11-28 03:11:16,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:16,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:11:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:16,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:11:16,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:11:16,581 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 03:11:16,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:16,711 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2024-11-28 03:11:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:11:16,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2024-11-28 03:11:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:16,713 INFO L225 Difference]: With dead ends: 94 [2024-11-28 03:11:16,713 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 03:11:16,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:11:16,714 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:16,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 228 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 03:11:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2024-11-28 03:11:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 03:11:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2024-11-28 03:11:16,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 27 [2024-11-28 03:11:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:16,721 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2024-11-28 03:11:16,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 03:11:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2024-11-28 03:11:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 03:11:16,722 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:16,722 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:16,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:16,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 03:11:16,923 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:16,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:16,923 INFO L85 PathProgramCache]: Analyzing trace with hash -73736206, now seen corresponding path program 2 times [2024-11-28 03:11:16,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:16,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600206489] [2024-11-28 03:11:16,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:16,963 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:16,963 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:17,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:17,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600206489] [2024-11-28 03:11:17,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600206489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:17,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820873921] [2024-11-28 03:11:17,495 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:17,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:17,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:17,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:11:17,627 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:17,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:17,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 03:11:17,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:17,740 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 03:11:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:17,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:17,863 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 03:11:17,867 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 03:11:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:17,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820873921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:17,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:17,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2024-11-28 03:11:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092749731] [2024-11-28 03:11:17,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:17,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:11:17,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:17,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:11:17,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:11:17,959 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 03:11:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:18,131 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2024-11-28 03:11:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:11:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 30 [2024-11-28 03:11:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:18,133 INFO L225 Difference]: With dead ends: 127 [2024-11-28 03:11:18,133 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 03:11:18,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:11:18,134 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:18,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 373 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 03:11:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2024-11-28 03:11:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 03:11:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2024-11-28 03:11:18,138 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 30 [2024-11-28 03:11:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:18,138 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2024-11-28 03:11:18,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 03:11:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2024-11-28 03:11:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 03:11:18,139 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:18,139 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:18,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:11:18,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 03:11:18,344 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:18,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash 249552319, now seen corresponding path program 1 times [2024-11-28 03:11:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:18,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888288545] [2024-11-28 03:11:18,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:18,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888288545] [2024-11-28 03:11:18,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888288545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453027209] [2024-11-28 03:11:18,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:18,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:18,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:18,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:18,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:11:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:18,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:11:18,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:18,845 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 03:11:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:19,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453027209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:19,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:19,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-28 03:11:19,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976321262] [2024-11-28 03:11:19,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:19,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:11:19,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:19,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:11:19,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:11:19,350 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 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 03:11:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:19,695 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2024-11-28 03:11:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:11:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 03:11:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:19,697 INFO L225 Difference]: With dead ends: 104 [2024-11-28 03:11:19,697 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 03:11:19,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:11:19,699 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:19,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 323 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 03:11:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2024-11-28 03:11:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 102 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 03:11:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2024-11-28 03:11:19,705 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 31 [2024-11-28 03:11:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:19,705 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2024-11-28 03:11:19,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 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 03:11:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2024-11-28 03:11:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 03:11:19,706 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:19,706 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:19,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:11:19,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 03:11:19,907 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:19,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash -853812687, now seen corresponding path program 1 times [2024-11-28 03:11:19,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:19,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357972485] [2024-11-28 03:11:19,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:19,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:20,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:20,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357972485] [2024-11-28 03:11:20,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357972485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:20,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229725493] [2024-11-28 03:11:20,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:20,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:20,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:20,224 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:20,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:11:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:20,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:11:20,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:20,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:20,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:11:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229725493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:20,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-28 03:11:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053208644] [2024-11-28 03:11:20,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:20,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:11:20,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:20,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:11:20,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:11:20,800 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:21,130 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2024-11-28 03:11:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:11:21,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-28 03:11:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:21,132 INFO L225 Difference]: With dead ends: 113 [2024-11-28 03:11:21,132 INFO L226 Difference]: Without dead ends: 110 [2024-11-28 03:11:21,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:11:21,133 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:21,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 430 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-28 03:11:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2024-11-28 03:11:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 100 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 03:11:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-11-28 03:11:21,138 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 32 [2024-11-28 03:11:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:21,138 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-11-28 03:11:21,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-11-28 03:11:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 03:11:21,138 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:21,138 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:21,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:11:21,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 03:11:21,339 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:21,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1743632619, now seen corresponding path program 3 times [2024-11-28 03:11:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136834733] [2024-11-28 03:11:21,340 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:11:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:21,379 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:11:21,379 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:21,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:21,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136834733] [2024-11-28 03:11:21,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136834733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:21,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654211934] [2024-11-28 03:11:21,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:11:21,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:21,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:21,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:21,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:11:21,908 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:11:21,908 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:21,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 03:11:21,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:22,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:22,366 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 03:11:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:22,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654211934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:22,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:22,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-11-28 03:11:22,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771367371] [2024-11-28 03:11:22,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:22,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:11:22,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:22,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:11:22,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:11:22,524 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 03:11:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:22,890 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2024-11-28 03:11:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:11:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 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 03:11:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:22,892 INFO L225 Difference]: With dead ends: 115 [2024-11-28 03:11:22,892 INFO L226 Difference]: Without dead ends: 115 [2024-11-28 03:11:22,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:11:22,893 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 51 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:22,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 401 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-28 03:11:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-11-28 03:11:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.146788990825688) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 03:11:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2024-11-28 03:11:22,899 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 34 [2024-11-28 03:11:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:22,899 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2024-11-28 03:11:22,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 03:11:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2024-11-28 03:11:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 03:11:22,902 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:22,902 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:22,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:23,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 03:11:23,103 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:23,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1224924264, now seen corresponding path program 4 times [2024-11-28 03:11:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:23,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113539804] [2024-11-28 03:11:23,104 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:11:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:23,129 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:11:23,129 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:24,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:24,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113539804] [2024-11-28 03:11:24,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113539804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:24,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406004001] [2024-11-28 03:11:24,151 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:11:24,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:24,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:24,154 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:24,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:11:24,278 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:11:24,278 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:24,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 03:11:24,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:24,320 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 03:11:25,399 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-11-28 03:11:25,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2024-11-28 03:11:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:25,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:26,547 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 03:11:26,559 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 03:11:26,570 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 03:11:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:26,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406004001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:26,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:26,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2024-11-28 03:11:26,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948526359] [2024-11-28 03:11:26,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:26,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 03:11:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:26,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 03:11:26,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:11:26,600 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:27,252 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2024-11-28 03:11:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:11:27,253 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-28 03:11:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:27,253 INFO L225 Difference]: With dead ends: 121 [2024-11-28 03:11:27,253 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 03:11:27,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:11:27,255 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:27,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 321 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:11:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 03:11:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-28 03:11:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 03:11:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2024-11-28 03:11:27,259 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 37 [2024-11-28 03:11:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:27,260 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2024-11-28 03:11:27,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2024-11-28 03:11:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 03:11:27,261 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:27,261 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:27,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:11:27,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 03:11:27,461 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:27,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2128585110, now seen corresponding path program 2 times [2024-11-28 03:11:27,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:27,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301758345] [2024-11-28 03:11:27,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:27,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:27,488 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:27,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:11:27,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:27,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301758345] [2024-11-28 03:11:27,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301758345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:27,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886334755] [2024-11-28 03:11:27,804 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:27,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:27,806 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:27,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:11:27,950 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:27,950 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:27,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 03:11:27,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:28,047 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 03:11:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:28,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:28,220 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 03:11:28,223 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 03:11:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:28,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886334755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:28,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:28,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-11-28 03:11:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996113404] [2024-11-28 03:11:28,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:28,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:11:28,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:28,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:11:28,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:11:28,315 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 03:11:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:28,920 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2024-11-28 03:11:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:11:28,921 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-28 03:11:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:28,921 INFO L225 Difference]: With dead ends: 132 [2024-11-28 03:11:28,922 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 03:11:28,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:11:28,923 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:28,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 304 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 03:11:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2024-11-28 03:11:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.139240506329114) internal successors, (90), 82 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 03:11:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2024-11-28 03:11:28,926 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 37 [2024-11-28 03:11:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:28,927 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2024-11-28 03:11:28,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 03:11:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2024-11-28 03:11:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 03:11:28,927 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:28,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:28,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:11:29,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 03:11:29,132 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:29,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:29,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1454101595, now seen corresponding path program 1 times [2024-11-28 03:11:29,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:29,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947669799] [2024-11-28 03:11:29,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:29,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:30,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:30,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947669799] [2024-11-28 03:11:30,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947669799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:30,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075587521] [2024-11-28 03:11:30,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:30,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:30,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:30,542 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:30,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:11:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:30,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-28 03:11:30,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:30,893 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 03:11:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:31,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:31,066 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 03:11:31,068 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 03:11:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075587521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:31,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:31,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 28 [2024-11-28 03:11:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093384344] [2024-11-28 03:11:31,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:31,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:11:31,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:31,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:11:31,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:11:31,181 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:32,308 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2024-11-28 03:11:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:11:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-28 03:11:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:32,310 INFO L225 Difference]: With dead ends: 149 [2024-11-28 03:11:32,310 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 03:11:32,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 03:11:32,311 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:32,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 658 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:11:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 03:11:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2024-11-28 03:11:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 118 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 03:11:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2024-11-28 03:11:32,315 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 44 [2024-11-28 03:11:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:32,315 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2024-11-28 03:11:32,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2024-11-28 03:11:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 03:11:32,316 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:32,316 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1] [2024-11-28 03:11:32,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:11:32,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:32,521 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:32,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:32,521 INFO L85 PathProgramCache]: Analyzing trace with hash -484930568, now seen corresponding path program 3 times [2024-11-28 03:11:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:32,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998539317] [2024-11-28 03:11:32,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:11:32,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:32,548 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:11:32,548 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:33,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998539317] [2024-11-28 03:11:33,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998539317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:33,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727543654] [2024-11-28 03:11:33,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:11:33,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:33,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:33,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:33,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:11:33,312 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:11:33,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:33,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 03:11:33,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:33,323 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 03:11:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:33,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:33,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727543654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:33,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:33,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-28 03:11:33,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245063705] [2024-11-28 03:11:33,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:33,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:11:33,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:33,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:11:33,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:11:33,926 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 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 03:11:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:34,289 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2024-11-28 03:11:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:11:34,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 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 45 [2024-11-28 03:11:34,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:34,290 INFO L225 Difference]: With dead ends: 122 [2024-11-28 03:11:34,290 INFO L226 Difference]: Without dead ends: 122 [2024-11-28 03:11:34,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2024-11-28 03:11:34,291 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:34,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 370 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-28 03:11:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2024-11-28 03:11:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 120 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 03:11:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2024-11-28 03:11:34,295 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 45 [2024-11-28 03:11:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:34,295 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2024-11-28 03:11:34,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 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 03:11:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2024-11-28 03:11:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 03:11:34,296 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:34,296 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:34,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:11:34,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:34,497 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:34,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2147021592, now seen corresponding path program 2 times [2024-11-28 03:11:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:34,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642882608] [2024-11-28 03:11:34,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:34,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:34,521 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:34,522 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:34,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:34,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642882608] [2024-11-28 03:11:34,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642882608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:34,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614707943] [2024-11-28 03:11:34,735 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:34,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:34,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:34,738 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:34,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:11:34,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:34,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:34,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 03:11:34,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:35,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:35,453 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 03:11:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614707943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:35,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:35,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-28 03:11:35,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632648516] [2024-11-28 03:11:35,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:35,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:11:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:35,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:11:35,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:11:35,506 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 03:11:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:36,140 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2024-11-28 03:11:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 03:11:36,144 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 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 03:11:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:36,144 INFO L225 Difference]: With dead ends: 178 [2024-11-28 03:11:36,145 INFO L226 Difference]: Without dead ends: 155 [2024-11-28 03:11:36,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:11:36,149 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:36,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 539 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-28 03:11:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2024-11-28 03:11:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.091549295774648) internal successors, (155), 145 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 03:11:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 155 transitions. [2024-11-28 03:11:36,155 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 155 transitions. Word has length 46 [2024-11-28 03:11:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:36,158 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 155 transitions. [2024-11-28 03:11:36,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 03:11:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 155 transitions. [2024-11-28 03:11:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:11:36,159 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:36,159 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:36,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:36,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-28 03:11:36,360 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:36,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1871721620, now seen corresponding path program 2 times [2024-11-28 03:11:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823932498] [2024-11-28 03:11:36,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:36,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:36,377 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:36,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:36,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:36,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823932498] [2024-11-28 03:11:36,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823932498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:36,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698769835] [2024-11-28 03:11:36,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:36,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:36,815 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:36,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:11:36,994 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:36,994 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:36,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 03:11:36,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:37,010 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 03:11:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:37,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:37,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698769835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:37,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2024-11-28 03:11:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824241175] [2024-11-28 03:11:37,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:37,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:11:37,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:37,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:11:37,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:11:37,775 INFO L87 Difference]: Start difference. First operand 146 states and 155 transitions. Second operand has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 03:11:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:38,286 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2024-11-28 03:11:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:11:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 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 48 [2024-11-28 03:11:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:38,288 INFO L225 Difference]: With dead ends: 160 [2024-11-28 03:11:38,288 INFO L226 Difference]: Without dead ends: 160 [2024-11-28 03:11:38,288 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:11:38,289 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:38,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 679 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:11:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-28 03:11:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2024-11-28 03:11:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0974025974025974) internal successors, (169), 157 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2024-11-28 03:11:38,293 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 48 [2024-11-28 03:11:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:38,293 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2024-11-28 03:11:38,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 29 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 03:11:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2024-11-28 03:11:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 03:11:38,294 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:38,294 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:38,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:11:38,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-28 03:11:38,499 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:38,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1101573089, now seen corresponding path program 3 times [2024-11-28 03:11:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:38,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312379858] [2024-11-28 03:11:38,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:11:38,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:38,528 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:11:38,528 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:39,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312379858] [2024-11-28 03:11:39,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312379858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425426696] [2024-11-28 03:11:39,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:11:39,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:39,079 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:39,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:11:39,271 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:11:39,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:39,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-28 03:11:39,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:39,445 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 03:11:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:39,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:39,599 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 03:11:39,601 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 03:11:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:11:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425426696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:39,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:39,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 27 [2024-11-28 03:11:39,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092941126] [2024-11-28 03:11:39,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:39,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:11:39,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:39,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:11:39,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:11:39,712 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 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 03:11:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:40,098 INFO L93 Difference]: Finished difference Result 256 states and 273 transitions. [2024-11-28 03:11:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:11:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 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) Word has length 51 [2024-11-28 03:11:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:40,099 INFO L225 Difference]: With dead ends: 256 [2024-11-28 03:11:40,099 INFO L226 Difference]: Without dead ends: 209 [2024-11-28 03:11:40,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:11:40,100 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 35 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:40,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 881 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-28 03:11:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2024-11-28 03:11:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.09) internal successors, (218), 203 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 03:11:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 218 transitions. [2024-11-28 03:11:40,106 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 218 transitions. Word has length 51 [2024-11-28 03:11:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:40,106 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 218 transitions. [2024-11-28 03:11:40,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 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 03:11:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 218 transitions. [2024-11-28 03:11:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 03:11:40,107 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:40,107 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:40,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:40,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:40,308 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:40,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash 787083718, now seen corresponding path program 4 times [2024-11-28 03:11:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:40,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842002596] [2024-11-28 03:11:40,308 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:11:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:40,334 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:11:40,334 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 03:11:41,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:41,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842002596] [2024-11-28 03:11:41,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842002596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:41,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869722244] [2024-11-28 03:11:41,518 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:11:41,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:41,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:41,519 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:41,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:11:41,685 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:11:41,685 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:41,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-28 03:11:41,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:41,789 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 03:11:43,668 INFO L349 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2024-11-28 03:11:43,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2024-11-28 03:11:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:11:43,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:44,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-11-28 03:11:44,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2024-11-28 03:11:44,991 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 03:11:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:11:45,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869722244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:45,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:45,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 49 [2024-11-28 03:11:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585313445] [2024-11-28 03:11:45,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:45,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 03:11:45,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:45,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 03:11:45,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2176, Unknown=1, NotChecked=0, Total=2450 [2024-11-28 03:11:45,138 INFO L87 Difference]: Start difference. First operand 204 states and 218 transitions. Second operand has 50 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 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 03:11:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:45,923 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2024-11-28 03:11:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:11:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 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) Word has length 55 [2024-11-28 03:11:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:45,924 INFO L225 Difference]: With dead ends: 218 [2024-11-28 03:11:45,925 INFO L226 Difference]: Without dead ends: 154 [2024-11-28 03:11:45,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=329, Invalid=2426, Unknown=1, NotChecked=0, Total=2756 [2024-11-28 03:11:45,926 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:45,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 447 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:11:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-28 03:11:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2024-11-28 03:11:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 03:11:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2024-11-28 03:11:45,930 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2024-11-28 03:11:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:45,930 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2024-11-28 03:11:45,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 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 03:11:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2024-11-28 03:11:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 03:11:45,930 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:45,930 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 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, 1] [2024-11-28 03:11:45,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:11:46,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:46,131 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:46,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:46,132 INFO L85 PathProgramCache]: Analyzing trace with hash -322484022, now seen corresponding path program 4 times [2024-11-28 03:11:46,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:46,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064356404] [2024-11-28 03:11:46,132 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:11:46,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:46,162 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:11:46,162 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:11:47,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:47,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064356404] [2024-11-28 03:11:47,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064356404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:47,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487098579] [2024-11-28 03:11:47,041 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:11:47,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:47,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:47,043 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:47,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:11:47,199 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:11:47,199 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:47,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 03:11:47,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:47,317 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 03:11:48,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:11:48,646 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 03:11:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:11:49,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:49,785 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 03:11:49,794 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 64 treesize of output 54 [2024-11-28 03:11:49,803 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 03:11:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:11:49,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487098579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:49,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:49,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2024-11-28 03:11:49,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538374376] [2024-11-28 03:11:49,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:49,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 03:11:49,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:49,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 03:11:49,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:11:49,882 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 03:11:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:50,347 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2024-11-28 03:11:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:11:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 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 55 [2024-11-28 03:11:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:50,348 INFO L225 Difference]: With dead ends: 61 [2024-11-28 03:11:50,348 INFO L226 Difference]: Without dead ends: 61 [2024-11-28 03:11:50,348 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 03:11:50,349 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:50,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 319 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-28 03:11:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-28 03:11:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 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 03:11:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2024-11-28 03:11:50,351 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2024-11-28 03:11:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:50,351 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2024-11-28 03:11:50,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 03:11:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2024-11-28 03:11:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 03:11:50,352 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:50,352 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:50,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:11:50,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:50,553 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:50,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:50,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1407070074, now seen corresponding path program 3 times [2024-11-28 03:11:50,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:50,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842440374] [2024-11-28 03:11:50,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:11:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:50,584 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:11:50,584 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842440374] [2024-11-28 03:11:51,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842440374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402201807] [2024-11-28 03:11:51,208 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:11:51,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:51,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:51,211 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:51,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:11:51,454 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:11:51,454 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:51,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 03:11:51,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:51,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:51,940 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 03:11:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:11:52,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402201807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:52,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:52,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2024-11-28 03:11:52,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225290667] [2024-11-28 03:11:52,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:52,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:11:52,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:52,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:11:52,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:11:52,010 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 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 03:11:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:52,319 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2024-11-28 03:11:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:11:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 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 56 [2024-11-28 03:11:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:52,320 INFO L225 Difference]: With dead ends: 70 [2024-11-28 03:11:52,320 INFO L226 Difference]: Without dead ends: 67 [2024-11-28 03:11:52,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:11:52,321 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:52,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 270 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:11:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-28 03:11:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-28 03:11:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2024-11-28 03:11:52,323 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 56 [2024-11-28 03:11:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:52,323 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2024-11-28 03:11:52,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 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 03:11:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2024-11-28 03:11:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 03:11:52,324 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:52,324 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:52,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 03:11:52,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 03:11:52,525 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:52,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash 932352379, now seen corresponding path program 4 times [2024-11-28 03:11:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:52,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427954862] [2024-11-28 03:11:52,525 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:11:52,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:52,555 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:11:52,555 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 37 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:11:53,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427954862] [2024-11-28 03:11:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427954862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971354315] [2024-11-28 03:11:53,079 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:11:53,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:53,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:53,080 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:53,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:11:53,287 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:11:53,287 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:53,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 03:11:53,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:53,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:11:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:11:53,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:53,708 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 03:11:53,711 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 03:11:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:11:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971354315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:53,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:53,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 28 [2024-11-28 03:11:53,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975030198] [2024-11-28 03:11:53,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:53,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:11:53,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:53,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:11:53,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:11:53,820 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 03:11:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:54,366 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2024-11-28 03:11:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:11:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 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 03:11:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:54,367 INFO L225 Difference]: With dead ends: 111 [2024-11-28 03:11:54,367 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 03:11:54,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 03:11:54,368 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:54,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 513 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 03:11:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2024-11-28 03:11:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 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 03:11:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-11-28 03:11:54,370 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 62 [2024-11-28 03:11:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:54,370 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-11-28 03:11:54,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 03:11:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-11-28 03:11:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 03:11:54,371 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:54,371 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:54,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:11:54,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 03:11:54,572 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:54,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 252622196, now seen corresponding path program 5 times [2024-11-28 03:11:54,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:54,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901921915] [2024-11-28 03:11:54,573 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:11:54,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:54,621 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 03:11:54,622 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:11:55,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901921915] [2024-11-28 03:11:55,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901921915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115599055] [2024-11-28 03:11:55,096 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:11:55,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:55,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:55,099 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:55,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:11:55,401 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 03:11:55,401 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:55,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-28 03:11:55,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:55,584 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 03:11:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:11:55,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:55,843 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 03:11:55,845 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 03:11:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:11:55,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115599055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:55,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:55,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2024-11-28 03:11:55,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927344940] [2024-11-28 03:11:55,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:55,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 03:11:55,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:55,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 03:11:55,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:11:55,962 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 03:11:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:57,184 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2024-11-28 03:11:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 03:11:57,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 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 66 [2024-11-28 03:11:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:57,186 INFO L225 Difference]: With dead ends: 185 [2024-11-28 03:11:57,186 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 03:11:57,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=2467, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 03:11:57,187 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:57,188 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 566 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:11:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 03:11:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-11-28 03:11:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2024-11-28 03:11:57,192 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 66 [2024-11-28 03:11:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:57,193 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2024-11-28 03:11:57,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 03:11:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2024-11-28 03:11:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 03:11:57,194 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:57,194 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:57,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:57,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 03:11:57,395 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:11:57,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1050647206, now seen corresponding path program 6 times [2024-11-28 03:11:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306836067] [2024-11-28 03:11:57,396 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:11:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:57,470 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 03:11:57,471 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:11:57,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:57,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306836067] [2024-11-28 03:11:57,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306836067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:57,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222005940] [2024-11-28 03:11:57,866 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:11:57,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:57,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:57,868 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:57,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:11:58,151 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 03:11:58,151 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:58,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:11:58,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:11:58,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:58,931 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 03:11:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:11:59,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222005940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:59,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:59,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2024-11-28 03:11:59,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59449004] [2024-11-28 03:11:59,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:59,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:11:59,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:59,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:11:59,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:11:59,039 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 36 states, 36 states have (on average 4.083333333333333) internal successors, (147), 36 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 03:12:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:00,219 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2024-11-28 03:12:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 03:12:00,220 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.083333333333333) internal successors, (147), 36 states have internal predecessors, (147), 0 states have call successors, (0), 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 74 [2024-11-28 03:12:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:00,221 INFO L225 Difference]: With dead ends: 126 [2024-11-28 03:12:00,221 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 03:12:00,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=399, Invalid=3383, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 03:12:00,222 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:00,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 513 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:12:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 03:12:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2024-11-28 03:12:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 03:12:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2024-11-28 03:12:00,225 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 74 [2024-11-28 03:12:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:00,226 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2024-11-28 03:12:00,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.083333333333333) internal successors, (147), 36 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 03:12:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2024-11-28 03:12:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 03:12:00,227 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:00,227 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:00,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:12:00,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-28 03:12:00,427 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:00,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1349741036, now seen corresponding path program 7 times [2024-11-28 03:12:00,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:00,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458338479] [2024-11-28 03:12:00,428 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:12:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:12:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:12:01,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:01,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458338479] [2024-11-28 03:12:01,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458338479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:01,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469221263] [2024-11-28 03:12:01,178 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:12:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:01,182 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:01,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:12:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:12:01,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-28 03:12:01,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:12:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:12:01,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:12:02,177 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 03:12:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:12:02,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469221263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:12:02,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:12:02,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2024-11-28 03:12:02,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337900405] [2024-11-28 03:12:02,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:12:02,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:12:02,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:12:02,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:12:02,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:12:02,297 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 36 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 03:12:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:02,981 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2024-11-28 03:12:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:12:02,982 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 36 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 84 [2024-11-28 03:12:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:02,982 INFO L225 Difference]: With dead ends: 98 [2024-11-28 03:12:02,982 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 03:12:02,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 03:12:02,983 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:02,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 649 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:12:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 03:12:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-28 03:12:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.043010752688172) internal successors, (97), 94 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:12:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2024-11-28 03:12:02,986 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 84 [2024-11-28 03:12:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:02,986 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2024-11-28 03:12:02,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 36 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 03:12:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2024-11-28 03:12:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-28 03:12:02,987 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:02,987 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:02,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 03:12:03,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-28 03:12:03,191 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:03,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:03,191 INFO L85 PathProgramCache]: Analyzing trace with hash 113931401, now seen corresponding path program 8 times [2024-11-28 03:12:03,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:03,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509952348] [2024-11-28 03:12:03,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:12:03,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:03,229 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:12:03,229 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 115 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 03:12:03,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509952348] [2024-11-28 03:12:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509952348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:03,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164710317] [2024-11-28 03:12:03,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:12:03,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:03,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:03,679 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:03,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:12:03,939 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:12:03,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:03,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-28 03:12:03,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:12:04,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:12:05,118 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:12:05,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:12:05,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2024-11-28 03:12:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 55 proven. 88 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 03:12:05,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:12:05,711 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 03:12:05,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 03:12:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 55 proven. 88 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-28 03:12:06,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164710317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:12:06,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:12:06,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2024-11-28 03:12:06,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420670106] [2024-11-28 03:12:06,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:12:06,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 03:12:06,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:12:06,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 03:12:06,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2136, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 03:12:06,604 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 03:12:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:09,194 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2024-11-28 03:12:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 03:12:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 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 90 [2024-11-28 03:12:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:09,195 INFO L225 Difference]: With dead ends: 245 [2024-11-28 03:12:09,196 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 03:12:09,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=272, Invalid=5130, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 03:12:09,196 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:09,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1258 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 03:12:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 03:12:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2024-11-28 03:12:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 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 03:12:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2024-11-28 03:12:09,199 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 90 [2024-11-28 03:12:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:09,199 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2024-11-28 03:12:09,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 03:12:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2024-11-28 03:12:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-28 03:12:09,200 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:09,200 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:09,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 03:12:09,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-28 03:12:09,401 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:09,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:09,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1814117445, now seen corresponding path program 9 times [2024-11-28 03:12:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:09,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233369705] [2024-11-28 03:12:09,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:12:09,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:09,481 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 03:12:09,481 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 28 proven. 158 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 03:12:11,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:11,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233369705] [2024-11-28 03:12:11,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233369705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:11,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626846787] [2024-11-28 03:12:11,299 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:12:11,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:11,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:11,304 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:11,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:12:12,343 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 03:12:12,343 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:12,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-28 03:12:12,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:12:12,362 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 03:12:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 141 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 03:12:12,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:12:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 141 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 03:12:13,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626846787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:12:13,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:12:13,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 50 [2024-11-28 03:12:13,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552113730] [2024-11-28 03:12:13,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:12:13,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 03:12:13,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:12:13,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 03:12:13,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2216, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 03:12:13,720 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 51 states, 50 states have (on average 4.1) internal successors, (205), 51 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 03:12:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:14,549 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2024-11-28 03:12:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:12:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.1) internal successors, (205), 51 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) Word has length 98 [2024-11-28 03:12:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:14,550 INFO L225 Difference]: With dead ends: 112 [2024-11-28 03:12:14,550 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 03:12:14,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=536, Invalid=3370, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 03:12:14,551 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:14,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 381 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:12:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 03:12:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-28 03:12:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 03:12:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2024-11-28 03:12:14,555 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 98 [2024-11-28 03:12:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:14,555 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2024-11-28 03:12:14,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.1) internal successors, (205), 51 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 03:12:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2024-11-28 03:12:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-28 03:12:14,556 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:14,557 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:14,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:12:14,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:14,758 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:14,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:14,758 INFO L85 PathProgramCache]: Analyzing trace with hash -533231376, now seen corresponding path program 10 times [2024-11-28 03:12:14,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:14,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628582220] [2024-11-28 03:12:14,759 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:12:14,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:14,815 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:12:14,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 56 proven. 168 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 03:12:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628582220] [2024-11-28 03:12:15,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628582220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055752671] [2024-11-28 03:12:15,362 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:12:15,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:15,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:15,364 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:15,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:12:15,794 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:12:15,794 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:15,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-28 03:12:15,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:12:16,061 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 03:12:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-28 03:12:16,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:12:17,310 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 31 treesize of output 27 [2024-11-28 03:12:17,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:12:17,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-11-28 03:12:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 72 proven. 129 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-28 03:12:17,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055752671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:12:17,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:12:17,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 56 [2024-11-28 03:12:17,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562953593] [2024-11-28 03:12:17,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:12:17,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-28 03:12:17,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:12:17,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-28 03:12:17,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2920, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 03:12:17,896 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 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 03:12:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:20,537 INFO L93 Difference]: Finished difference Result 281 states and 284 transitions. [2024-11-28 03:12:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-28 03:12:20,537 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 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 104 [2024-11-28 03:12:20,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:20,538 INFO L225 Difference]: With dead ends: 281 [2024-11-28 03:12:20,538 INFO L226 Difference]: Without dead ends: 123 [2024-11-28 03:12:20,539 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=371, Invalid=7285, Unknown=0, NotChecked=0, Total=7656 [2024-11-28 03:12:20,539 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:20,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1358 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 03:12:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-28 03:12:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-11-28 03:12:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 03:12:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2024-11-28 03:12:20,543 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 104 [2024-11-28 03:12:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:20,543 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2024-11-28 03:12:20,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 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 03:12:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2024-11-28 03:12:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-28 03:12:20,544 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:20,545 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:20,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 03:12:20,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:20,745 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:20,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:20,746 INFO L85 PathProgramCache]: Analyzing trace with hash -479479646, now seen corresponding path program 11 times [2024-11-28 03:12:20,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:20,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055050248] [2024-11-28 03:12:20,746 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:12:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:20,847 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 03:12:20,847 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 69 proven. 183 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 03:12:21,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:21,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055050248] [2024-11-28 03:12:21,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055050248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:21,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903738510] [2024-11-28 03:12:21,954 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:12:21,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:21,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:21,957 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:21,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:12:23,496 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 03:12:23,496 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:23,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-28 03:12:23,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:12:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 03:12:24,110 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:12:24,613 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 03:12:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 03:12:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903738510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:12:25,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:12:25,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 52 [2024-11-28 03:12:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2241750] [2024-11-28 03:12:25,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:12:25,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 03:12:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:12:25,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 03:12:25,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2383, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 03:12:25,085 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 53 states, 52 states have (on average 4.403846153846154) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 03:12:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:25,952 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2024-11-28 03:12:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:12:25,953 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.403846153846154) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 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 03:12:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:25,954 INFO L225 Difference]: With dead ends: 126 [2024-11-28 03:12:25,954 INFO L226 Difference]: Without dead ends: 123 [2024-11-28 03:12:25,954 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=471, Invalid=3311, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 03:12:25,955 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:25,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 859 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:12:25,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-28 03:12:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-28 03:12:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 122 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 03:12:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2024-11-28 03:12:25,958 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 112 [2024-11-28 03:12:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:25,959 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2024-11-28 03:12:25,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.403846153846154) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 03:12:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2024-11-28 03:12:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-28 03:12:25,960 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:25,960 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:25,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-28 03:12:26,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:26,161 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:26,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:26,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2097351529, now seen corresponding path program 12 times [2024-11-28 03:12:26,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:26,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125373020] [2024-11-28 03:12:26,162 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:12:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:26,275 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 03:12:26,275 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 65 proven. 231 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-28 03:12:27,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:27,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125373020] [2024-11-28 03:12:27,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125373020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:27,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526211691] [2024-11-28 03:12:27,029 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:12:27,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:27,031 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:27,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:12:30,376 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 03:12:30,376 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:30,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-28 03:12:30,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:12:31,151 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 03:12:31,758 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 03:12:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 77 proven. 282 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:12:31,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:12:32,331 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 03:12:32,333 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 03:12:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 77 proven. 192 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-28 03:12:32,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526211691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:12:32,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:12:32,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 21] total 64 [2024-11-28 03:12:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271899512] [2024-11-28 03:12:32,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:12:32,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-28 03:12:32,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:12:32,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-28 03:12:32,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3849, Unknown=0, NotChecked=0, Total=4032 [2024-11-28 03:12:32,868 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 64 states, 64 states have (on average 4.3125) internal successors, (276), 64 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 03:12:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:35,681 INFO L93 Difference]: Finished difference Result 317 states and 320 transitions. [2024-11-28 03:12:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-28 03:12:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.3125) internal successors, (276), 64 states have internal predecessors, (276), 0 states have call successors, (0), 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 118 [2024-11-28 03:12:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:35,682 INFO L225 Difference]: With dead ends: 317 [2024-11-28 03:12:35,682 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 03:12:35,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=330, Invalid=7860, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 03:12:35,684 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 3541 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:35,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2065 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3541 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 03:12:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 03:12:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2024-11-28 03:12:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 130 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 03:12:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2024-11-28 03:12:35,687 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 118 [2024-11-28 03:12:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:35,687 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2024-11-28 03:12:35,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.3125) internal successors, (276), 64 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 03:12:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2024-11-28 03:12:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-28 03:12:35,689 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:35,689 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:35,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-28 03:12:35,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-28 03:12:35,890 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:35,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:35,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1778787529, now seen corresponding path program 13 times [2024-11-28 03:12:35,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:35,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483298298] [2024-11-28 03:12:35,891 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:12:35,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:12:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 66 proven. 262 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 03:12:36,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:36,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483298298] [2024-11-28 03:12:36,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483298298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:36,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728082489] [2024-11-28 03:12:36,960 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:12:36,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:36,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:36,961 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:36,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:12:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:12:37,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 03:12:37,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:12:37,604 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 03:12:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 40 proven. 259 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 03:12:38,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:12:38,294 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 03:12:38,296 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 03:12:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 40 proven. 259 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 03:12:38,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728082489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:12:38,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:12:38,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2024-11-28 03:12:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133184697] [2024-11-28 03:12:38,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:12:38,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 03:12:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:12:38,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 03:12:38,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2031, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 03:12:38,493 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 47 states, 47 states have (on average 4.276595744680851) internal successors, (201), 47 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 03:12:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:41,281 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2024-11-28 03:12:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-28 03:12:41,281 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.276595744680851) internal successors, (201), 47 states have internal predecessors, (201), 0 states have call successors, (0), 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 126 [2024-11-28 03:12:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:41,282 INFO L225 Difference]: With dead ends: 234 [2024-11-28 03:12:41,282 INFO L226 Difference]: Without dead ends: 144 [2024-11-28 03:12:41,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=458, Invalid=7374, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 03:12:41,283 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 30 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 2999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:41,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1800 Invalid, 2999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 03:12:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-28 03:12:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2024-11-28 03:12:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 03:12:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2024-11-28 03:12:41,286 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 126 [2024-11-28 03:12:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:41,286 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2024-11-28 03:12:41,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.276595744680851) internal successors, (201), 47 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 03:12:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2024-11-28 03:12:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-28 03:12:41,288 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:41,288 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:41,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 03:12:41,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-28 03:12:41,488 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:41,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1213684553, now seen corresponding path program 14 times [2024-11-28 03:12:41,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:41,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905272012] [2024-11-28 03:12:41,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:12:41,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:41,537 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:12:41,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 74 proven. 304 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-11-28 03:12:42,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:42,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905272012] [2024-11-28 03:12:42,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905272012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:42,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309951484] [2024-11-28 03:12:42,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:12:42,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:42,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:42,268 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:42,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:12:42,582 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:12:42,583 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:42,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-28 03:12:42,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:12:43,175 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 03:12:44,678 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:12:44,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:12:44,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2024-11-28 03:12:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 45 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 03:12:44,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:12:45,838 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 03:12:45,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 03:12:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 45 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 03:12:47,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309951484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:12:47,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:12:47,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 26] total 70 [2024-11-28 03:12:47,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937867423] [2024-11-28 03:12:47,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:12:47,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-28 03:12:47,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:12:47,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-28 03:12:47,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4658, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 03:12:47,384 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 70 states, 70 states have (on average 4.314285714285714) internal successors, (302), 70 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 03:12:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:12:52,888 INFO L93 Difference]: Finished difference Result 365 states and 368 transitions. [2024-11-28 03:12:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-28 03:12:52,889 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.314285714285714) internal successors, (302), 70 states have internal predecessors, (302), 0 states have call successors, (0), 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 136 [2024-11-28 03:12:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:12:52,890 INFO L225 Difference]: With dead ends: 365 [2024-11-28 03:12:52,890 INFO L226 Difference]: Without dead ends: 155 [2024-11-28 03:12:52,891 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=396, Invalid=11376, Unknown=0, NotChecked=0, Total=11772 [2024-11-28 03:12:52,891 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 31 mSDsluCounter, 2937 mSDsCounter, 0 mSdLazyCounter, 5112 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 5120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:12:52,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2990 Invalid, 5120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5112 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-28 03:12:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-28 03:12:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2024-11-28 03:12:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 03:12:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2024-11-28 03:12:52,894 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 136 [2024-11-28 03:12:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:12:52,894 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2024-11-28 03:12:52,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.314285714285714) internal successors, (302), 70 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 03:12:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2024-11-28 03:12:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-28 03:12:52,896 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:12:52,896 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:12:52,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 03:12:53,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-28 03:12:53,097 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:12:53,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:12:53,097 INFO L85 PathProgramCache]: Analyzing trace with hash 628337769, now seen corresponding path program 15 times [2024-11-28 03:12:53,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:12:53,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593850416] [2024-11-28 03:12:53,097 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:12:53,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:12:53,202 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:12:53,202 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:12:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 03:12:55,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:12:55,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593850416] [2024-11-28 03:12:55,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593850416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:12:55,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021987555] [2024-11-28 03:12:55,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:12:55,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:12:55,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:12:55,193 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:12:55,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:13:02,138 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:13:02,138 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:02,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-28 03:13:02,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 03:13:02,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:13:03,495 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 03:13:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 03:13:03,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021987555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:13:03,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:13:03,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 54 [2024-11-28 03:13:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945607864] [2024-11-28 03:13:03,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:13:03,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 03:13:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:13:03,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 03:13:03,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2561, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 03:13:03,796 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 55 states, 54 states have (on average 4.407407407407407) internal successors, (238), 55 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 03:13:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:13:05,042 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2024-11-28 03:13:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:13:05,042 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.407407407407407) internal successors, (238), 55 states have internal predecessors, (238), 0 states have call successors, (0), 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 144 [2024-11-28 03:13:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:13:05,043 INFO L225 Difference]: With dead ends: 158 [2024-11-28 03:13:05,043 INFO L226 Difference]: Without dead ends: 155 [2024-11-28 03:13:05,044 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 251 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=807, Invalid=4595, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 03:13:05,044 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:13:05,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 705 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:13:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-28 03:13:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2024-11-28 03:13:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.026143790849673) internal successors, (157), 154 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 03:13:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2024-11-28 03:13:05,047 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 144 [2024-11-28 03:13:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:13:05,047 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2024-11-28 03:13:05,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.407407407407407) internal successors, (238), 55 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 03:13:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2024-11-28 03:13:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-28 03:13:05,049 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:13:05,050 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:13:05,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-28 03:13:05,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-28 03:13:05,251 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:13:05,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:05,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1929726178, now seen corresponding path program 16 times [2024-11-28 03:13:05,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:13:05,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968747788] [2024-11-28 03:13:05,251 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:13:05,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:13:05,317 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:13:05,317 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 271 proven. 202 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 03:13:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:13:07,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968747788] [2024-11-28 03:13:07,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968747788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:13:07,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985050388] [2024-11-28 03:13:07,218 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:13:07,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:07,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:13:07,220 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:13:07,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:13:08,893 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:13:08,893 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:08,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-28 03:13:08,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:09,469 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 03:13:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 50 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 03:13:10,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:13:10,377 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 03:13:10,381 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 03:13:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 50 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-28 03:13:10,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985050388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:13:10,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:13:10,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 55 [2024-11-28 03:13:10,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132835322] [2024-11-28 03:13:10,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:13:10,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 03:13:10,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:13:10,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 03:13:10,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2807, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 03:13:10,635 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 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 03:13:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:13:14,491 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2024-11-28 03:13:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 03:13:14,491 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 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) Word has length 150 [2024-11-28 03:13:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:13:14,492 INFO L225 Difference]: With dead ends: 265 [2024-11-28 03:13:14,492 INFO L226 Difference]: Without dead ends: 162 [2024-11-28 03:13:14,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=582, Invalid=8730, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 03:13:14,494 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 56 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:13:14,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2104 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2621 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 03:13:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-28 03:13:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2024-11-28 03:13:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 158 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 03:13:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2024-11-28 03:13:14,497 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 150 [2024-11-28 03:13:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:13:14,498 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2024-11-28 03:13:14,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 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 03:13:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2024-11-28 03:13:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-28 03:13:14,500 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:13:14,500 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:13:14,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 03:13:14,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:14,700 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:13:14,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1997244393, now seen corresponding path program 17 times [2024-11-28 03:13:14,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:13:14,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534896937] [2024-11-28 03:13:14,701 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:13:14,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:13:14,820 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 03:13:14,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 83 proven. 387 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-11-28 03:13:15,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:13:15,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534896937] [2024-11-28 03:13:15,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534896937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:13:15,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506545025] [2024-11-28 03:13:15,697 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:13:15,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:15,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:13:15,699 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:13:15,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 03:13:25,750 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 03:13:25,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:25,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:13:25,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 83 proven. 387 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-11-28 03:13:26,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:13:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 83 proven. 387 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-11-28 03:13:27,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506545025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:13:27,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:13:27,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 63 [2024-11-28 03:13:27,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054055501] [2024-11-28 03:13:27,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:13:27,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-28 03:13:27,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:13:27,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-28 03:13:27,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3707, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 03:13:27,506 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 63 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 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 03:13:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:13:28,985 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2024-11-28 03:13:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:13:28,986 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 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 154 [2024-11-28 03:13:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:13:28,987 INFO L225 Difference]: With dead ends: 227 [2024-11-28 03:13:28,987 INFO L226 Difference]: Without dead ends: 166 [2024-11-28 03:13:28,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=284, Invalid=4972, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 03:13:28,988 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 44 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:13:28,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2715 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 03:13:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-28 03:13:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2024-11-28 03:13:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 03:13:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2024-11-28 03:13:28,991 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 154 [2024-11-28 03:13:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:13:28,991 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2024-11-28 03:13:28,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 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 03:13:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2024-11-28 03:13:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-28 03:13:28,995 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:13:28,995 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:13:29,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 03:13:29,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:29,196 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:13:29,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1638875312, now seen corresponding path program 18 times [2024-11-28 03:13:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:13:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331430368] [2024-11-28 03:13:29,196 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:13:29,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:13:29,308 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 03:13:29,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 120 proven. 390 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 03:13:31,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:13:31,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331430368] [2024-11-28 03:13:31,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331430368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:13:31,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100865669] [2024-11-28 03:13:31,508 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:13:31,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:31,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:13:31,509 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:13:31,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:13:39,810 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 03:13:39,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:39,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-28 03:13:39,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 153 proven. 357 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 03:13:40,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:13:41,113 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 03:13:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 153 proven. 357 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 03:13:41,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100865669] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:13:41,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:13:41,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 59 [2024-11-28 03:13:41,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779814425] [2024-11-28 03:13:41,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:13:41,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 03:13:41,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:13:41,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 03:13:41,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 03:13:41,375 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 60 states, 59 states have (on average 4.322033898305085) internal successors, (255), 60 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 03:13:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:13:42,399 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2024-11-28 03:13:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 03:13:42,400 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.322033898305085) internal successors, (255), 60 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 158 [2024-11-28 03:13:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:13:42,401 INFO L225 Difference]: With dead ends: 172 [2024-11-28 03:13:42,401 INFO L226 Difference]: Without dead ends: 169 [2024-11-28 03:13:42,402 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 277 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=985, Invalid=5335, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 03:13:42,402 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:13:42,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 490 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:13:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-28 03:13:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-11-28 03:13:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 168 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 03:13:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2024-11-28 03:13:42,405 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 158 [2024-11-28 03:13:42,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:13:42,406 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2024-11-28 03:13:42,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.322033898305085) internal successors, (255), 60 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 03:13:42,406 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2024-11-28 03:13:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-28 03:13:42,407 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:13:42,407 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:13:42,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 03:13:42,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:42,611 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:13:42,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash 402768069, now seen corresponding path program 19 times [2024-11-28 03:13:42,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:13:42,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939812478] [2024-11-28 03:13:42,611 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:13:42,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:13:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:13:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 92 proven. 480 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-11-28 03:13:43,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:13:43,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939812478] [2024-11-28 03:13:43,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939812478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:13:43,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052809666] [2024-11-28 03:13:43,613 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:13:43,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:13:43,614 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:13:43,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:13:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:13:43,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-28 03:13:43,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:44,456 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 03:13:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 55 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 03:13:45,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:13:45,247 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 03:13:45,249 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 03:13:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 55 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 03:13:45,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052809666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:13:45,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:13:45,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 56 [2024-11-28 03:13:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886768856] [2024-11-28 03:13:45,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:13:45,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-28 03:13:45,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:13:45,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-28 03:13:45,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2962, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 03:13:45,452 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 56 states, 56 states have (on average 4.464285714285714) internal successors, (250), 56 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 03:13:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:13:49,149 INFO L93 Difference]: Finished difference Result 437 states and 440 transitions. [2024-11-28 03:13:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-28 03:13:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.464285714285714) internal successors, (250), 56 states have internal predecessors, (250), 0 states have call successors, (0), 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 164 [2024-11-28 03:13:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:13:49,150 INFO L225 Difference]: With dead ends: 437 [2024-11-28 03:13:49,150 INFO L226 Difference]: Without dead ends: 183 [2024-11-28 03:13:49,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=334, Invalid=9968, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 03:13:49,151 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 38 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 5616 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 5626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 5616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:13:49,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3249 Invalid, 5626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 5616 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 03:13:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-28 03:13:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2024-11-28 03:13:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.022857142857143) internal successors, (179), 176 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 03:13:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2024-11-28 03:13:49,166 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 164 [2024-11-28 03:13:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:13:49,166 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2024-11-28 03:13:49,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.464285714285714) internal successors, (250), 56 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 03:13:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2024-11-28 03:13:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-28 03:13:49,167 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:13:49,168 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:13:49,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 03:13:49,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:49,368 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:13:49,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:49,369 INFO L85 PathProgramCache]: Analyzing trace with hash -492836489, now seen corresponding path program 20 times [2024-11-28 03:13:49,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:13:49,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870673650] [2024-11-28 03:13:49,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:13:49,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:13:49,419 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:13:49,419 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 153 proven. 463 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 03:13:50,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:13:50,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870673650] [2024-11-28 03:13:50,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870673650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:13:50,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081821733] [2024-11-28 03:13:50,680 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:13:50,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:50,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:13:50,681 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:13:50,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 03:13:51,054 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:13:51,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:51,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-28 03:13:51,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 190 proven. 426 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 03:13:51,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:13:52,539 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 03:13:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 190 proven. 426 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 03:13:52,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081821733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:13:52,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:13:52,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 59 [2024-11-28 03:13:52,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918798745] [2024-11-28 03:13:52,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:13:52,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 03:13:52,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:13:52,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 03:13:52,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3141, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 03:13:52,870 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 60 states, 59 states have (on average 4.559322033898305) internal successors, (269), 60 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:13:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:13:54,409 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2024-11-28 03:13:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 03:13:54,409 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.559322033898305) internal successors, (269), 60 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2024-11-28 03:13:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:13:54,410 INFO L225 Difference]: With dead ends: 186 [2024-11-28 03:13:54,410 INFO L226 Difference]: Without dead ends: 183 [2024-11-28 03:13:54,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 301 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 03:13:54,410 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 16 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:13:54,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1619 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:13:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-28 03:13:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-11-28 03:13:54,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.022099447513812) internal successors, (185), 182 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 03:13:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2024-11-28 03:13:54,414 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 172 [2024-11-28 03:13:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:13:54,415 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2024-11-28 03:13:54,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.559322033898305) internal successors, (269), 60 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:13:54,415 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2024-11-28 03:13:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-11-28 03:13:54,416 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:13:54,416 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:13:54,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 03:13:54,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-28 03:13:54,617 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:13:54,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2044490156, now seen corresponding path program 21 times [2024-11-28 03:13:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:13:54,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859454794] [2024-11-28 03:13:54,617 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:13:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:13:54,795 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 03:13:54,796 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:14:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 397 proven. 521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:14:02,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:14:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859454794] [2024-11-28 03:14:02,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859454794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:14:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334434818] [2024-11-28 03:14:02,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:14:02,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:14:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:14:02,121 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:14:02,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 03:14:54,701 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 03:14:54,701 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:14:54,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 224 conjuncts are in the unsatisfiable core [2024-11-28 03:14:54,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:14:58,047 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 03:15:00,136 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 03:15:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 60 proven. 858 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:00,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:02,175 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 03:15:02,178 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 03:15:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 60 proven. 668 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-28 03:15:04,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334434818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:04,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:04,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 44, 33] total 129 [2024-11-28 03:15:04,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264871290] [2024-11-28 03:15:04,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:04,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-28 03:15:04,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:04,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-28 03:15:04,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=15929, Unknown=0, NotChecked=0, Total=16512 [2024-11-28 03:15:04,275 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 129 states, 129 states have (on average 3.7364341085271318) internal successors, (482), 129 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 03:15:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:21,124 INFO L93 Difference]: Finished difference Result 397 states and 400 transitions. [2024-11-28 03:15:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-28 03:15:21,124 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.7364341085271318) internal successors, (482), 129 states have internal predecessors, (482), 0 states have call successors, (0), 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 178 [2024-11-28 03:15:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:21,125 INFO L225 Difference]: With dead ends: 397 [2024-11-28 03:15:21,125 INFO L226 Difference]: Without dead ends: 190 [2024-11-28 03:15:21,126 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8511 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=1293, Invalid=36537, Unknown=0, NotChecked=0, Total=37830 [2024-11-28 03:15:21,126 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 117 mSDsluCounter, 5525 mSDsCounter, 0 mSdLazyCounter, 10073 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 5598 SdHoareTripleChecker+Invalid, 10096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 10073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:21,127 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 5598 Invalid, 10096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 10073 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-28 03:15:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-28 03:15:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2024-11-28 03:15:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.0216216216216216) internal successors, (189), 186 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 03:15:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2024-11-28 03:15:21,129 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 178 [2024-11-28 03:15:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:21,130 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2024-11-28 03:15:21,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.7364341085271318) internal successors, (482), 129 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 03:15:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2024-11-28 03:15:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-11-28 03:15:21,131 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:21,131 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:21,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 03:15:21,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-28 03:15:21,331 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:15:21,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:21,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1349219109, now seen corresponding path program 22 times [2024-11-28 03:15:21,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:21,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465151177] [2024-11-28 03:15:21,332 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:15:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:21,428 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:15:21,429 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 101 proven. 583 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 03:15:22,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:22,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465151177] [2024-11-28 03:15:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465151177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:22,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055034818] [2024-11-28 03:15:22,290 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:15:22,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:22,292 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:22,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 03:15:25,883 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:15:25,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:25,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-28 03:15:25,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 101 proven. 583 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 03:15:26,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 101 proven. 583 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 03:15:27,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055034818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:27,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:27,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2024-11-28 03:15:27,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292364337] [2024-11-28 03:15:27,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:27,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-28 03:15:27,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:27,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-28 03:15:27,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3151, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 03:15:27,693 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 58 states, 58 states have (on average 4.5) internal successors, (261), 58 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 03:15:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:29,135 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2024-11-28 03:15:29,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 03:15:29,135 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.5) internal successors, (261), 58 states have internal predecessors, (261), 0 states have call successors, (0), 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 182 [2024-11-28 03:15:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:29,136 INFO L225 Difference]: With dead ends: 267 [2024-11-28 03:15:29,136 INFO L226 Difference]: Without dead ends: 194 [2024-11-28 03:15:29,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=205, Invalid=4351, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 03:15:29,137 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 25 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:29,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3008 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 03:15:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-28 03:15:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2024-11-28 03:15:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.0211640211640212) internal successors, (193), 190 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 03:15:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2024-11-28 03:15:29,141 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 182 [2024-11-28 03:15:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:29,141 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2024-11-28 03:15:29,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.5) internal successors, (261), 58 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 03:15:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2024-11-28 03:15:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-11-28 03:15:29,142 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:29,142 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:29,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 03:15:29,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-28 03:15:29,343 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:15:29,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1207444770, now seen corresponding path program 23 times [2024-11-28 03:15:29,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:29,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025242031] [2024-11-28 03:15:29,343 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:15:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:29,525 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-28 03:15:29,525 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 231 proven. 501 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 03:15:31,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:31,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025242031] [2024-11-28 03:15:31,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025242031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:31,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132640452] [2024-11-28 03:15:31,049 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:15:31,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:31,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:31,052 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:31,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 03:16:37,225 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-28 03:16:37,225 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:37,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-28 03:16:37,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 231 proven. 501 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 03:16:38,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:39,166 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 03:16:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 231 proven. 501 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 03:16:40,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132640452] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:40,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:40,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 77 [2024-11-28 03:16:40,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616510359] [2024-11-28 03:16:40,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:40,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-28 03:16:40,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:40,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-28 03:16:40,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=5199, Unknown=0, NotChecked=0, Total=6006 [2024-11-28 03:16:40,035 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 78 states, 77 states have (on average 4.532467532467533) internal successors, (349), 78 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 03:16:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:41,607 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2024-11-28 03:16:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 03:16:41,608 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 4.532467532467533) internal successors, (349), 78 states have internal predecessors, (349), 0 states have call successors, (0), 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 186 [2024-11-28 03:16:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:41,608 INFO L225 Difference]: With dead ends: 200 [2024-11-28 03:16:41,608 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 03:16:41,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=990, Invalid=7382, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 03:16:41,609 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 13 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:41,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1452 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 03:16:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 03:16:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-11-28 03:16:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 196 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 03:16:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2024-11-28 03:16:41,612 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 186 [2024-11-28 03:16:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:41,613 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2024-11-28 03:16:41,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 4.532467532467533) internal successors, (349), 78 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 03:16:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2024-11-28 03:16:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-28 03:16:41,614 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:41,614 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:41,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 03:16:41,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:41,815 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:16:41,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1819113939, now seen corresponding path program 24 times [2024-11-28 03:16:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:41,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74559237] [2024-11-28 03:16:41,816 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:16:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:42,042 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 03:16:42,043 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 110 proven. 696 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 03:16:43,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74559237] [2024-11-28 03:16:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74559237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765938096] [2024-11-28 03:16:43,181 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:16:43,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:43,183 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:43,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 03:18:36,716 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 03:18:36,716 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:36,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 245 conjuncts are in the unsatisfiable core [2024-11-28 03:18:36,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:18:38,955 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 03:18:40,561 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 03:18:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 65 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:18:40,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:18:42,167 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 03:18:42,169 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 03:18:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 65 proven. 789 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-28 03:18:43,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765938096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:43,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:43,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 47, 35] total 109 [2024-11-28 03:18:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132271206] [2024-11-28 03:18:43,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:43,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-28 03:18:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:43,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-28 03:18:43,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=11408, Unknown=0, NotChecked=0, Total=11772 [2024-11-28 03:18:43,675 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 109 states, 109 states have (on average 4.330275229357798) internal successors, (472), 109 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 03:18:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:18:51,439 INFO L93 Difference]: Finished difference Result 509 states and 512 transitions. [2024-11-28 03:18:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-11-28 03:18:51,439 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 4.330275229357798) internal successors, (472), 109 states have internal predecessors, (472), 0 states have call successors, (0), 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 192 [2024-11-28 03:18:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:18:51,440 INFO L225 Difference]: With dead ends: 509 [2024-11-28 03:18:51,440 INFO L226 Difference]: Without dead ends: 211 [2024-11-28 03:18:51,441 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=633, Invalid=25127, Unknown=0, NotChecked=0, Total=25760 [2024-11-28 03:18:51,442 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 77 mSDsluCounter, 5236 mSDsCounter, 0 mSdLazyCounter, 9347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 5309 SdHoareTripleChecker+Invalid, 9372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 9347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:18:51,442 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 5309 Invalid, 9372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 9347 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-28 03:18:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-28 03:18:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2024-11-28 03:18:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.019704433497537) internal successors, (207), 204 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 03:18:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2024-11-28 03:18:51,445 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 192 [2024-11-28 03:18:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:18:51,446 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2024-11-28 03:18:51,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 4.330275229357798) internal successors, (472), 109 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 03:18:51,446 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2024-11-28 03:18:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-28 03:18:51,447 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:18:51,447 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:18:51,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 03:18:51,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-28 03:18:51,648 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:18:51,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1861436293, now seen corresponding path program 25 times [2024-11-28 03:18:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:51,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521932558] [2024-11-28 03:18:51,649 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:18:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:18:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 231 proven. 627 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 03:18:53,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521932558] [2024-11-28 03:18:53,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521932558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:18:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447337685] [2024-11-28 03:18:53,425 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:18:53,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:18:53,427 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:18:53,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 03:18:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:18:53,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-28 03:18:53,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:18:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 276 proven. 582 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 03:18:54,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:18:55,988 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 03:18:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 276 proven. 582 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 03:18:56,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447337685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:56,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:56,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 67 [2024-11-28 03:18:56,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443364297] [2024-11-28 03:18:56,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:56,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-28 03:18:56,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:56,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-28 03:18:56,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=4041, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 03:18:56,470 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 68 states, 67 states have (on average 4.611940298507463) internal successors, (309), 68 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 03:18:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:18:58,398 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2024-11-28 03:18:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 03:18:58,398 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.611940298507463) internal successors, (309), 68 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 200 [2024-11-28 03:18:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:18:58,400 INFO L225 Difference]: With dead ends: 214 [2024-11-28 03:18:58,400 INFO L226 Difference]: Without dead ends: 211 [2024-11-28 03:18:58,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 351 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=699, Invalid=6107, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 03:18:58,400 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 11 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:18:58,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1969 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2710 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 03:18:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-28 03:18:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-11-28 03:18:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 209 states have (on average 1.0191387559808613) internal successors, (213), 210 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2024-11-28 03:18:58,404 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 200 [2024-11-28 03:18:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:18:58,404 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2024-11-28 03:18:58,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.611940298507463) internal successors, (309), 68 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 03:18:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2024-11-28 03:18:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-28 03:18:58,406 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:18:58,406 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:18:58,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 03:18:58,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-28 03:18:58,606 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:18:58,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash 291211578, now seen corresponding path program 26 times [2024-11-28 03:18:58,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:58,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440864200] [2024-11-28 03:18:58,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:18:58,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:58,697 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:18:58,697 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 119 proven. 819 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2024-11-28 03:18:59,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:59,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440864200] [2024-11-28 03:18:59,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440864200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:18:59,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823314112] [2024-11-28 03:18:59,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:18:59,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:59,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:18:59,793 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:18:59,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 03:19:00,316 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:00,316 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:00,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-28 03:19:00,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:01,072 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 03:19:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 70 proven. 871 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 03:19:02,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:02,350 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 03:19:02,352 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 03:19:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 70 proven. 871 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-28 03:19:02,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823314112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:02,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:02,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35, 35] total 68 [2024-11-28 03:19:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235410649] [2024-11-28 03:19:02,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:02,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-28 03:19:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:02,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-28 03:19:02,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4414, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 03:19:02,643 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 68 states, 68 states have (on average 4.5588235294117645) internal successors, (310), 68 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 03:19:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:08,799 INFO L93 Difference]: Finished difference Result 545 states and 548 transitions. [2024-11-28 03:19:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-11-28 03:19:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.5588235294117645) internal successors, (310), 68 states have internal predecessors, (310), 0 states have call successors, (0), 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 03:19:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:08,801 INFO L225 Difference]: With dead ends: 545 [2024-11-28 03:19:08,802 INFO L226 Difference]: Without dead ends: 225 [2024-11-28 03:19:08,802 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=412, Invalid=15338, Unknown=0, NotChecked=0, Total=15750 [2024-11-28 03:19:08,803 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 44 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 8384 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4811 SdHoareTripleChecker+Invalid, 8397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 8384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:08,803 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 4811 Invalid, 8397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 8384 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 03:19:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-28 03:19:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 219. [2024-11-28 03:19:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 217 states have (on average 1.0184331797235022) internal successors, (221), 218 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2024-11-28 03:19:08,807 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 206 [2024-11-28 03:19:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:08,808 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2024-11-28 03:19:08,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.5588235294117645) internal successors, (310), 68 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 03:19:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2024-11-28 03:19:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-11-28 03:19:08,809 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:08,810 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:08,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 03:19:09,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:09,010 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:19:09,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash 831574892, now seen corresponding path program 27 times [2024-11-28 03:19:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:09,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903533632] [2024-11-28 03:19:09,011 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:09,216 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 03:19:09,216 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 276 proven. 718 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 03:19:12,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903533632] [2024-11-28 03:19:12,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903533632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200687877] [2024-11-28 03:19:12,096 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:12,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:12,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:12,098 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:12,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 03:20:05,321 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-28 03:20:05,321 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:05,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-28 03:20:05,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 325 proven. 1047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:08,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:10,004 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 15 treesize of output 11 [2024-11-28 03:20:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 325 proven. 669 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 03:20:11,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200687877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:11,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:11,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 51, 34] total 123 [2024-11-28 03:20:11,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643156857] [2024-11-28 03:20:11,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:11,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-28 03:20:11,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:11,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-28 03:20:11,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1591, Invalid=13661, Unknown=0, NotChecked=0, Total=15252 [2024-11-28 03:20:11,175 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand has 124 states, 123 states have (on average 4.308943089430894) internal successors, (530), 124 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:15,498 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2024-11-28 03:20:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-28 03:20:15,501 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 4.308943089430894) internal successors, (530), 124 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2024-11-28 03:20:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:15,502 INFO L225 Difference]: With dead ends: 235 [2024-11-28 03:20:15,502 INFO L226 Difference]: Without dead ends: 232 [2024-11-28 03:20:15,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10218 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2789, Invalid=25603, Unknown=0, NotChecked=0, Total=28392 [2024-11-28 03:20:15,503 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 50 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:15,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1359 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 03:20:15,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-28 03:20:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2024-11-28 03:20:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 224 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 03:20:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2024-11-28 03:20:15,507 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 214 [2024-11-28 03:20:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:15,507 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2024-11-28 03:20:15,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 4.308943089430894) internal successors, (530), 124 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2024-11-28 03:20:15,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-28 03:20:15,509 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:15,509 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:15,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 03:20:15,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:15,710 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:20:15,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash 17911777, now seen corresponding path program 28 times [2024-11-28 03:20:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:15,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176388433] [2024-11-28 03:20:15,711 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:20:15,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:15,786 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:20:15,787 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 128 proven. 952 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2024-11-28 03:20:16,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:16,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176388433] [2024-11-28 03:20:16,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176388433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:16,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893262501] [2024-11-28 03:20:16,950 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:20:16,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:16,952 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:16,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 03:20:36,149 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:20:36,149 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:36,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 170 conjuncts are in the unsatisfiable core [2024-11-28 03:20:36,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:37,085 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 03:20:38,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-28 03:20:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 75 proven. 1008 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 03:20:38,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:38,584 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 03:20:38,586 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 03:20:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 75 proven. 1008 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-28 03:20:38,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893262501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:38,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:38,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37, 37] total 73 [2024-11-28 03:20:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135341036] [2024-11-28 03:20:38,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:38,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-28 03:20:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:38,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-28 03:20:38,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5103, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 03:20:38,909 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 73 states, 73 states have (on average 4.5479452054794525) internal successors, (332), 73 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 03:20:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:45,755 INFO L93 Difference]: Finished difference Result 581 states and 584 transitions. [2024-11-28 03:20:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-28 03:20:45,755 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.5479452054794525) internal successors, (332), 73 states have internal predecessors, (332), 0 states have call successors, (0), 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 03:20:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:45,756 INFO L225 Difference]: With dead ends: 581 [2024-11-28 03:20:45,756 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 03:20:45,757 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=441, Invalid=17649, Unknown=0, NotChecked=0, Total=18090 [2024-11-28 03:20:45,757 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 46 mSDsluCounter, 5308 mSDsCounter, 0 mSdLazyCounter, 9448 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 5391 SdHoareTripleChecker+Invalid, 9462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 9448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:45,757 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 5391 Invalid, 9462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 9448 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-28 03:20:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 03:20:45,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2024-11-28 03:20:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 232 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 03:20:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2024-11-28 03:20:45,761 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 220 [2024-11-28 03:20:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:45,761 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2024-11-28 03:20:45,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.5479452054794525) internal successors, (332), 73 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 03:20:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2024-11-28 03:20:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-11-28 03:20:45,762 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:45,763 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:45,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:45,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-11-28 03:20:45,963 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:20:45,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1831650669, now seen corresponding path program 29 times [2024-11-28 03:20:45,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:45,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594879347] [2024-11-28 03:20:45,964 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:20:45,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:46,222 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-11-28 03:20:46,222 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 378 proven. 762 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 03:20:48,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594879347] [2024-11-28 03:20:48,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594879347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962144972] [2024-11-28 03:20:48,425 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:20:48,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:48,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:48,427 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:48,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 03:22:01,519 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-11-28 03:22:01,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:01,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-28 03:22:01,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:22:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 378 proven. 762 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 03:22:02,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:22:04,088 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 03:22:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 378 proven. 762 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-28 03:22:05,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962144972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:22:05,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:22:05,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 91 [2024-11-28 03:22:05,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956704791] [2024-11-28 03:22:05,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:22:05,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-28 03:22:05,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:22:05,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-28 03:22:05,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1066, Invalid=7306, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 03:22:05,271 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 03:22:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:22:07,375 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2024-11-28 03:22:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-28 03:22:07,376 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 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 228 [2024-11-28 03:22:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:22:07,377 INFO L225 Difference]: With dead ends: 242 [2024-11-28 03:22:07,377 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 03:22:07,378 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3245 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1310, Invalid=10462, Unknown=0, NotChecked=0, Total=11772 [2024-11-28 03:22:07,378 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 14 mSDsluCounter, 2576 mSDsCounter, 0 mSdLazyCounter, 3503 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2656 SdHoareTripleChecker+Invalid, 3504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:22:07,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2656 Invalid, 3504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3503 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 03:22:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 03:22:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2024-11-28 03:22:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.0168776371308017) internal successors, (241), 238 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 03:22:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2024-11-28 03:22:07,382 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 228 [2024-11-28 03:22:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:22:07,382 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2024-11-28 03:22:07,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 03:22:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2024-11-28 03:22:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2024-11-28 03:22:07,384 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:22:07,384 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:22:07,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-28 03:22:07,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2024-11-28 03:22:07,585 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-28 03:22:07,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:22:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1715634744, now seen corresponding path program 30 times [2024-11-28 03:22:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:22:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634180745] [2024-11-28 03:22:07,585 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:22:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:22:07,860 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 03:22:07,860 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1670 backedges. 137 proven. 1095 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-11-28 03:22:09,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:22:09,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634180745] [2024-11-28 03:22:09,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634180745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:22:09,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13157550] [2024-11-28 03:22:09,273 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:22:09,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:22:09,275 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:22:09,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87a94fcd-5530-42c9-bdb9-9f0a76550948/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process