./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrncpy_diffterm_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrncpy_diffterm_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX --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 64bit --witnessprinter.graph.data.programhash 29a0de6b7697865a37e60a82150f204059592b57f74fd0ca1d5024446fc510b4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:14:01,276 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:14:01,376 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-08 17:14:01,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:14:01,383 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:14:01,426 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:14:01,427 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:14:01,428 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:14:01,430 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:14:01,433 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:14:01,433 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:14:01,434 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:14:01,435 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:14:01,435 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:14:01,436 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:14:01,436 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:14:01,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:14:01,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:14:01,441 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:14:01,441 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:14:01,442 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:14:01,443 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:14:01,443 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:14:01,443 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:14:01,444 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:14:01,444 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:14:01,445 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:14:01,445 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:14:01,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:14:01,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:14:01,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:14:01,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:14:01,451 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:14:01,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:14:01,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:14:01,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:14:01,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:14:01,454 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:14:01,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:14:01,454 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29a0de6b7697865a37e60a82150f204059592b57f74fd0ca1d5024446fc510b4 [2024-11-08 17:14:01,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:14:01,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:14:01,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:14:01,867 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:14:01,869 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:14:01,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/termination-15/cstrncpy_diffterm_alloca.i Unable to find full path for "g++" [2024-11-08 17:14:04,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:14:04,656 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:14:04,657 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/sv-benchmarks/c/termination-15/cstrncpy_diffterm_alloca.i [2024-11-08 17:14:04,674 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/data/e21cbca16/7b4ca602a6004c56845b18091b9f2993/FLAG2456d04f8 [2024-11-08 17:14:04,861 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/data/e21cbca16/7b4ca602a6004c56845b18091b9f2993 [2024-11-08 17:14:04,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:14:04,869 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:14:04,872 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:14:04,873 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:14:04,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:14:04,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:14:04" (1/1) ... [2024-11-08 17:14:04,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a107e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:04, skipping insertion in model container [2024-11-08 17:14:04,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:14:04" (1/1) ... [2024-11-08 17:14:04,949 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:14:05,432 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:14:05,435 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:14:05,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:14:05,452 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:14:05,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:14:05,567 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:14:05,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05 WrapperNode [2024-11-08 17:14:05,568 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:14:05,570 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:14:05,570 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:14:05,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:14:05,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,594 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,622 INFO L138 Inliner]: procedures = 152, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2024-11-08 17:14:05,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:14:05,625 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:14:05,626 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:14:05,626 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:14:05,641 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,644 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,675 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [1, 2]. [2024-11-08 17:14:05,676 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,688 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,696 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,698 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,705 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:14:05,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:14:05,710 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:14:05,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:14:05,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (1/1) ... [2024-11-08 17:14:05,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:14:05,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:05,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:14:05,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:14:05,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:14:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:14:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:14:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:14:05,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 17:14:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 17:14:05,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:14:05,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:14:05,914 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:14:05,917 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:14:06,196 INFO L? ?]: Removed 47 outVars from TransFormulas that were not future-live. [2024-11-08 17:14:06,196 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:14:06,243 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:14:06,244 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 17:14:06,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:14:06 BoogieIcfgContainer [2024-11-08 17:14:06,247 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:14:06,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:14:06,253 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:14:06,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:14:06,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:14:04" (1/3) ... [2024-11-08 17:14:06,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222609df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:14:06, skipping insertion in model container [2024-11-08 17:14:06,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:14:05" (2/3) ... [2024-11-08 17:14:06,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222609df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:14:06, skipping insertion in model container [2024-11-08 17:14:06,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:14:06" (3/3) ... [2024-11-08 17:14:06,261 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncpy_diffterm_alloca.i [2024-11-08 17:14:06,278 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:14:06,279 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-11-08 17:14:06,358 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:14:06,364 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;@70470912, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:14:06,365 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-08 17:14:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-08 17:14:06,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:06,379 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 17:14:06,380 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:06,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:06,387 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2024-11-08 17:14:06,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:06,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132285674] [2024-11-08 17:14:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:06,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:06,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132285674] [2024-11-08 17:14:06,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132285674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:06,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:06,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:14:06,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109794507] [2024-11-08 17:14:06,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:06,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:14:06,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:06,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:14:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:14:06,778 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:06,853 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-08 17:14:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:14:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-08 17:14:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:06,867 INFO L225 Difference]: With dead ends: 28 [2024-11-08 17:14:06,868 INFO L226 Difference]: Without dead ends: 26 [2024-11-08 17:14:06,870 INFO L431 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 [2024-11-08 17:14:06,875 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:06,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-08 17:14:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-08 17:14:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-11-08 17:14:06,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2024-11-08 17:14:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:06,934 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-11-08 17:14:06,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-11-08 17:14:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-08 17:14:06,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:06,936 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 17:14:06,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:14:06,936 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:06,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2024-11-08 17:14:06,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:06,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590520922] [2024-11-08 17:14:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:06,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:07,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:07,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590520922] [2024-11-08 17:14:07,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590520922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:07,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:07,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:14:07,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127450089] [2024-11-08 17:14:07,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:07,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:14:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:14:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:14:07,391 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:07,421 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-11-08 17:14:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:14:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-08 17:14:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:07,424 INFO L225 Difference]: With dead ends: 29 [2024-11-08 17:14:07,424 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 17:14:07,424 INFO L431 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 [2024-11-08 17:14:07,426 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:07,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:14:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 17:14:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-08 17:14:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-08 17:14:07,434 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 6 [2024-11-08 17:14:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:07,435 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-08 17:14:07,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-08 17:14:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-08 17:14:07,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:07,437 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 17:14:07,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:14:07,438 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:07,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:07,439 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2024-11-08 17:14:07,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:07,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065687762] [2024-11-08 17:14:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:07,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:07,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:07,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065687762] [2024-11-08 17:14:07,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065687762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:07,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:07,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:14:07,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038401238] [2024-11-08 17:14:07,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:07,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:14:07,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:07,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:14:07,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:14:07,824 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:07,858 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-08 17:14:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:14:07,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-08 17:14:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:07,863 INFO L225 Difference]: With dead ends: 28 [2024-11-08 17:14:07,863 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 17:14:07,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:14:07,866 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:07,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:14:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 17:14:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2024-11-08 17:14:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-08 17:14:07,875 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 6 [2024-11-08 17:14:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:07,876 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-08 17:14:07,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-08 17:14:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 17:14:07,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:07,882 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:07,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 17:14:07,882 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:07,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash 624632624, now seen corresponding path program 1 times [2024-11-08 17:14:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:07,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407471011] [2024-11-08 17:14:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:08,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407471011] [2024-11-08 17:14:08,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407471011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:08,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:08,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:14:08,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015929585] [2024-11-08 17:14:08,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:08,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:14:08,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:14:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:14:08,114 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:08,272 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-08 17:14:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:14:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 17:14:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:08,274 INFO L225 Difference]: With dead ends: 24 [2024-11-08 17:14:08,274 INFO L226 Difference]: Without dead ends: 24 [2024-11-08 17:14:08,274 INFO L431 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 [2024-11-08 17:14:08,275 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:08,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-08 17:14:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-08 17:14:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-11-08 17:14:08,285 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 10 [2024-11-08 17:14:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:08,285 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-11-08 17:14:08,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-11-08 17:14:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 17:14:08,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:08,287 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:08,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 17:14:08,287 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:08,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 624632625, now seen corresponding path program 1 times [2024-11-08 17:14:08,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:08,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292760750] [2024-11-08 17:14:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:08,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:08,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292760750] [2024-11-08 17:14:08,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292760750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:08,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:08,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:14:08,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287813858] [2024-11-08 17:14:08,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:08,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:14:08,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:08,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:14:08,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:14:08,603 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2024-11-08 17:14:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:08,686 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2024-11-08 17:14:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:14:08,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 [2024-11-08 17:14:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:08,688 INFO L225 Difference]: With dead ends: 29 [2024-11-08 17:14:08,688 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 17:14:08,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:14:08,691 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:08,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 97 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 17:14:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-08 17:14:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 26 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) [2024-11-08 17:14:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-08 17:14:08,704 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-11-08 17:14:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:08,705 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-08 17:14:08,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2024-11-08 17:14:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-08 17:14:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 17:14:08,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:08,706 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:08,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 17:14:08,707 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:08,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2111225134, now seen corresponding path program 1 times [2024-11-08 17:14:08,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:08,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727624346] [2024-11-08 17:14:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:08,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:08,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727624346] [2024-11-08 17:14:08,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727624346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:08,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:08,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:14:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571483058] [2024-11-08 17:14:08,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:08,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:14:08,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:14:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:14:08,871 INFO L87 Difference]: Start difference. First operand 27 states and 34 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) [2024-11-08 17:14:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:08,950 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-11-08 17:14:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:14:08,952 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 [2024-11-08 17:14:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:08,959 INFO L225 Difference]: With dead ends: 28 [2024-11-08 17:14:08,960 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 17:14:08,960 INFO L431 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 [2024-11-08 17:14:08,961 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:08,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 55 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 17:14:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-08 17:14:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-08 17:14:08,967 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 11 [2024-11-08 17:14:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:08,968 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-08 17:14:08,968 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) [2024-11-08 17:14:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-08 17:14:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 17:14:08,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:08,969 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:08,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 17:14:08,970 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:08,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2111225133, now seen corresponding path program 1 times [2024-11-08 17:14:08,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:08,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008538997] [2024-11-08 17:14:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:09,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:09,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008538997] [2024-11-08 17:14:09,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008538997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:09,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:09,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:14:09,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509233164] [2024-11-08 17:14:09,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:09,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:14:09,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:09,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:14:09,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:14:09,367 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2024-11-08 17:14:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:09,444 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2024-11-08 17:14:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:14:09,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 [2024-11-08 17:14:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:09,445 INFO L225 Difference]: With dead ends: 35 [2024-11-08 17:14:09,445 INFO L226 Difference]: Without dead ends: 35 [2024-11-08 17:14:09,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:14:09,446 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 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 [2024-11-08 17:14:09,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-08 17:14:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-11-08 17:14:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.5) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-11-08 17:14:09,456 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 11 [2024-11-08 17:14:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:09,457 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-11-08 17:14:09,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2024-11-08 17:14:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-11-08 17:14:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 17:14:09,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:09,458 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:09,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 17:14:09,459 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:09,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2110212211, now seen corresponding path program 1 times [2024-11-08 17:14:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:09,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378201546] [2024-11-08 17:14:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:09,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:09,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:09,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378201546] [2024-11-08 17:14:09,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378201546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:09,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:09,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:14:09,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152554914] [2024-11-08 17:14:09,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:09,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:14:09,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:14:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:14:09,528 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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) [2024-11-08 17:14:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:09,562 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-08 17:14:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:14:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 [2024-11-08 17:14:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:09,563 INFO L225 Difference]: With dead ends: 33 [2024-11-08 17:14:09,563 INFO L226 Difference]: Without dead ends: 33 [2024-11-08 17:14:09,564 INFO L431 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 [2024-11-08 17:14:09,565 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:09,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:14:09,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-08 17:14:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-08 17:14:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-08 17:14:09,571 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 11 [2024-11-08 17:14:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:09,572 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-08 17:14:09,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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) [2024-11-08 17:14:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-08 17:14:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 17:14:09,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:09,577 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:09,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 17:14:09,577 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:09,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1374395537, now seen corresponding path program 1 times [2024-11-08 17:14:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:09,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101879952] [2024-11-08 17:14:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:09,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:09,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101879952] [2024-11-08 17:14:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101879952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:09,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:09,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:14:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598521576] [2024-11-08 17:14:09,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:09,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:14:09,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:09,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:14:09,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:14:09,944 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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) [2024-11-08 17:14:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:10,035 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-08 17:14:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:14:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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 [2024-11-08 17:14:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:10,038 INFO L225 Difference]: With dead ends: 34 [2024-11-08 17:14:10,038 INFO L226 Difference]: Without dead ends: 34 [2024-11-08 17:14:10,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:14:10,041 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:10,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:10,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-08 17:14:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-11-08 17:14:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-08 17:14:10,049 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 11 [2024-11-08 17:14:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:10,049 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-08 17:14:10,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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) [2024-11-08 17:14:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-08 17:14:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 17:14:10,053 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:10,053 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:10,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 17:14:10,054 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:10,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:10,054 INFO L85 PathProgramCache]: Analyzing trace with hash -213195849, now seen corresponding path program 1 times [2024-11-08 17:14:10,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:10,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644436212] [2024-11-08 17:14:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:10,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:10,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644436212] [2024-11-08 17:14:10,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644436212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:10,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:10,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:14:10,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776861456] [2024-11-08 17:14:10,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:10,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:14:10,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:14:10,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:14:10,167 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2024-11-08 17:14:10,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:10,268 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-11-08 17:14:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:14:10,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 [2024-11-08 17:14:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:10,270 INFO L225 Difference]: With dead ends: 28 [2024-11-08 17:14:10,271 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 17:14:10,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:14:10,272 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:10,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 17:14:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-08 17:14:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-08 17:14:10,278 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2024-11-08 17:14:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:10,278 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-08 17:14:10,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2024-11-08 17:14:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-08 17:14:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 17:14:10,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:10,282 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:10,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 17:14:10,283 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:10,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash -213195848, now seen corresponding path program 1 times [2024-11-08 17:14:10,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:10,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168475617] [2024-11-08 17:14:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:10,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:10,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168475617] [2024-11-08 17:14:10,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168475617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:10,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:10,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-08 17:14:10,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836293735] [2024-11-08 17:14:10,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:10,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:14:10,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:14:10,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:14:10,461 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) 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) [2024-11-08 17:14:10,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:10,525 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-08 17:14:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:14:10,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) 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 [2024-11-08 17:14:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:10,527 INFO L225 Difference]: With dead ends: 37 [2024-11-08 17:14:10,527 INFO L226 Difference]: Without dead ends: 37 [2024-11-08 17:14:10,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:14:10,529 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:10,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 100 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-08 17:14:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-08 17:14:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-08 17:14:10,533 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 15 [2024-11-08 17:14:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:10,534 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-08 17:14:10,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) 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) [2024-11-08 17:14:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-08 17:14:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 17:14:10,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:10,535 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:10,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 17:14:10,536 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:10,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:10,537 INFO L85 PathProgramCache]: Analyzing trace with hash 44969590, now seen corresponding path program 1 times [2024-11-08 17:14:10,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:10,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115201786] [2024-11-08 17:14:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:11,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:11,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115201786] [2024-11-08 17:14:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115201786] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:11,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:11,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-08 17:14:11,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617572229] [2024-11-08 17:14:11,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:11,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:14:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:14:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:14:11,254 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2024-11-08 17:14:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:11,520 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-08 17:14:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 17:14:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 11 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 [2024-11-08 17:14:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:11,522 INFO L225 Difference]: With dead ends: 40 [2024-11-08 17:14:11,522 INFO L226 Difference]: Without dead ends: 40 [2024-11-08 17:14:11,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:14:11,523 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:11,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 70 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 17:14:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-08 17:14:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-08 17:14:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-11-08 17:14:11,527 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2024-11-08 17:14:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:11,528 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-11-08 17:14:11,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2024-11-08 17:14:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-11-08 17:14:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 17:14:11,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:11,529 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:11,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 17:14:11,529 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:11,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash 45458163, now seen corresponding path program 1 times [2024-11-08 17:14:11,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:11,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76106979] [2024-11-08 17:14:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:11,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:11,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76106979] [2024-11-08 17:14:11,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76106979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:11,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:11,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-08 17:14:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611565176] [2024-11-08 17:14:11,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:11,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:14:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:11,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:14:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:14:11,819 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2024-11-08 17:14:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:11,902 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2024-11-08 17:14:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:14:11,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 [2024-11-08 17:14:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:11,905 INFO L225 Difference]: With dead ends: 57 [2024-11-08 17:14:11,905 INFO L226 Difference]: Without dead ends: 57 [2024-11-08 17:14:11,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:14:11,907 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:11,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 106 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:14:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-08 17:14:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-08 17:14:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 56 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) [2024-11-08 17:14:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-11-08 17:14:11,914 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 15 [2024-11-08 17:14:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:11,915 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-11-08 17:14:11,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2024-11-08 17:14:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-11-08 17:14:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 17:14:11,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:11,919 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:11,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 17:14:11,920 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:11,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash -541347851, now seen corresponding path program 1 times [2024-11-08 17:14:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:11,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993347347] [2024-11-08 17:14:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:11,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:12,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:12,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993347347] [2024-11-08 17:14:12,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993347347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:14:12,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124114043] [2024-11-08 17:14:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:12,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:12,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:12,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:14:12,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:14:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:12,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-08 17:14:12,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:14:12,760 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 [2024-11-08 17:14:13,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:14:13,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-11-08 17:14:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:13,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:14:13,850 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 [2024-11-08 17:14:13,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 17:14:13,872 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 20 treesize of output 16 [2024-11-08 17:14:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:13,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124114043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:14:13,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:14:13,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-08 17:14:13,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762614442] [2024-11-08 17:14:13,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:14:13,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 17:14:13,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:13,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 17:14:13,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-08 17:14:13,899 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:14,356 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2024-11-08 17:14:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:14:14,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 17:14:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:14,358 INFO L225 Difference]: With dead ends: 63 [2024-11-08 17:14:14,358 INFO L226 Difference]: Without dead ends: 63 [2024-11-08 17:14:14,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-08 17:14:14,359 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:14,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 226 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 17:14:14,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-08 17:14:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2024-11-08 17:14:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 60 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) [2024-11-08 17:14:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-11-08 17:14:14,366 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 15 [2024-11-08 17:14:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:14,366 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-11-08 17:14:14,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-11-08 17:14:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 17:14:14,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:14,368 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:14,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:14:14,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 17:14:14,569 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:14,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 985904711, now seen corresponding path program 1 times [2024-11-08 17:14:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:14,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604532954] [2024-11-08 17:14:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:14,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:14:14,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:14,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604532954] [2024-11-08 17:14:14,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604532954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:14:14,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:14:14,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:14:14,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156021023] [2024-11-08 17:14:14,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:14:14,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:14:14,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:14:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:14:14,750 INFO L87 Difference]: Start difference. First operand 61 states and 70 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) [2024-11-08 17:14:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:14,777 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-11-08 17:14:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:14:14,778 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 [2024-11-08 17:14:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:14,778 INFO L225 Difference]: With dead ends: 60 [2024-11-08 17:14:14,779 INFO L226 Difference]: Without dead ends: 38 [2024-11-08 17:14:14,779 INFO L431 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 [2024-11-08 17:14:14,780 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:14,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:14:14,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-08 17:14:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-08 17:14:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2024-11-08 17:14:14,784 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 16 [2024-11-08 17:14:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:14,784 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2024-11-08 17:14:14,784 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) [2024-11-08 17:14:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2024-11-08 17:14:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 17:14:14,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:14,786 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:14,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 17:14:14,786 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:14,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash 398085775, now seen corresponding path program 1 times [2024-11-08 17:14:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:14,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307628397] [2024-11-08 17:14:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:15,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:15,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307628397] [2024-11-08 17:14:15,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307628397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:14:15,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344468212] [2024-11-08 17:14:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:15,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:15,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:15,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:14:15,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:14:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:15,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-08 17:14:15,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:14:15,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:14:15,522 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 [2024-11-08 17:14:15,529 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 [2024-11-08 17:14:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:16,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:14:16,536 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:14:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:16,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344468212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:14:16,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:14:16,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-08 17:14:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839407814] [2024-11-08 17:14:16,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:14:16,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 17:14:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 17:14:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-08 17:14:16,611 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:17,056 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-11-08 17:14:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 17:14:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-08 17:14:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:17,058 INFO L225 Difference]: With dead ends: 38 [2024-11-08 17:14:17,058 INFO L226 Difference]: Without dead ends: 38 [2024-11-08 17:14:17,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-11-08 17:14:17,059 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:17,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 75 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 17:14:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-08 17:14:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-11-08 17:14:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-11-08 17:14:17,063 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 16 [2024-11-08 17:14:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:17,064 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-11-08 17:14:17,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-11-08 17:14:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 17:14:17,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:17,065 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:17,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 17:14:17,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 17:14:17,270 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:17,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash -340759368, now seen corresponding path program 1 times [2024-11-08 17:14:17,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:17,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046506220] [2024-11-08 17:14:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:18,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:18,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046506220] [2024-11-08 17:14:18,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046506220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:14:18,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149286410] [2024-11-08 17:14:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:18,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:18,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:18,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:14:18,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:14:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:18,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-08 17:14:18,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:14:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:14:18,484 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 [2024-11-08 17:14:18,490 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 [2024-11-08 17:14:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:19,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:14:20,067 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:14:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:20,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149286410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:14:20,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:14:20,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-11-08 17:14:20,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977552209] [2024-11-08 17:14:20,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:14:20,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-08 17:14:20,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-08 17:14:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 17:14:20,198 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:22,065 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2024-11-08 17:14:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 17:14:22,066 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 17:14:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:22,067 INFO L225 Difference]: With dead ends: 74 [2024-11-08 17:14:22,067 INFO L226 Difference]: Without dead ends: 74 [2024-11-08 17:14:22,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=291, Invalid=2789, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 17:14:22,069 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:22,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 105 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 17:14:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-08 17:14:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-11-08 17:14:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 60 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) [2024-11-08 17:14:22,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2024-11-08 17:14:22,081 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 18 [2024-11-08 17:14:22,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:22,082 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2024-11-08 17:14:22,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2024-11-08 17:14:22,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 17:14:22,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:22,083 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:22,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:14:22,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 17:14:22,284 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:22,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash -37804559, now seen corresponding path program 2 times [2024-11-08 17:14:22,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:22,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208784774] [2024-11-08 17:14:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:22,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:23,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:23,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208784774] [2024-11-08 17:14:23,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208784774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:14:23,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067792931] [2024-11-08 17:14:23,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:14:23,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:23,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:23,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:14:23,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:14:23,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:14:23,192 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:14:23,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 17:14:23,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:14:23,239 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 [2024-11-08 17:14:23,924 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-11-08 17:14:23,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-11-08 17:14:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:24,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:14:24,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-08 17:14:24,869 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 [2024-11-08 17:14:24,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-11-08 17:14:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067792931] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:14:24,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:14:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-08 17:14:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943038026] [2024-11-08 17:14:24,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:14:24,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 17:14:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 17:14:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2024-11-08 17:14:24,936 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:25,784 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-11-08 17:14:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 17:14:25,785 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-08 17:14:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:25,786 INFO L225 Difference]: With dead ends: 73 [2024-11-08 17:14:25,786 INFO L226 Difference]: Without dead ends: 73 [2024-11-08 17:14:25,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 17:14:25,788 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:25,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 145 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 17:14:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-08 17:14:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2024-11-08 17:14:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 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) [2024-11-08 17:14:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-11-08 17:14:25,800 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 20 [2024-11-08 17:14:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:25,800 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-11-08 17:14:25,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-11-08 17:14:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 17:14:25,802 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:25,802 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:25,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 17:14:26,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 17:14:26,003 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:26,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2019126970, now seen corresponding path program 1 times [2024-11-08 17:14:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:26,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283430827] [2024-11-08 17:14:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:26,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:27,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:27,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283430827] [2024-11-08 17:14:27,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283430827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:14:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301358026] [2024-11-08 17:14:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:27,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:14:27,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:14:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:27,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-08 17:14:27,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:14:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:14:27,822 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 [2024-11-08 17:14:27,832 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 [2024-11-08 17:14:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:29,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:14:31,102 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:14:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:31,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301358026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:14:31,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:14:31,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-08 17:14:31,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826644514] [2024-11-08 17:14:31,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:14:31,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-08 17:14:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-08 17:14:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2453, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 17:14:31,243 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 52 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 52 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) [2024-11-08 17:14:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:36,131 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2024-11-08 17:14:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-08 17:14:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 52 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-08 17:14:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:36,132 INFO L225 Difference]: With dead ends: 110 [2024-11-08 17:14:36,133 INFO L226 Difference]: Without dead ends: 110 [2024-11-08 17:14:36,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=750, Invalid=7992, Unknown=0, NotChecked=0, Total=8742 [2024-11-08 17:14:36,138 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:36,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 196 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 17:14:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-08 17:14:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2024-11-08 17:14:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0978260869565217) internal successors, (101), 92 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) [2024-11-08 17:14:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2024-11-08 17:14:36,149 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 29 [2024-11-08 17:14:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:36,149 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2024-11-08 17:14:36,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 52 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) [2024-11-08 17:14:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2024-11-08 17:14:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 17:14:36,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:36,155 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:36,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:14:36,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:36,356 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:36,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash -102626504, now seen corresponding path program 2 times [2024-11-08 17:14:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234714907] [2024-11-08 17:14:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:38,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:38,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234714907] [2024-11-08 17:14:38,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234714907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:14:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970828423] [2024-11-08 17:14:38,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:14:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:38,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:14:38,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:14:38,220 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:14:38,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:14:38,225 WARN L253 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-08 17:14:38,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:14:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:14:38,360 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 [2024-11-08 17:14:38,367 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 [2024-11-08 17:14:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:40,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:14:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:14:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:42,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970828423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:14:42,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:14:42,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 58 [2024-11-08 17:14:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998389527] [2024-11-08 17:14:42,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:14:42,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-08 17:14:42,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-08 17:14:42,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3164, Unknown=0, NotChecked=0, Total=3422 [2024-11-08 17:14:42,242 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 59 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 59 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) [2024-11-08 17:14:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:49,147 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2024-11-08 17:14:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-08 17:14:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 59 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 30 [2024-11-08 17:14:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:49,148 INFO L225 Difference]: With dead ends: 175 [2024-11-08 17:14:49,149 INFO L226 Difference]: Without dead ends: 175 [2024-11-08 17:14:49,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1160, Invalid=11050, Unknown=0, NotChecked=0, Total=12210 [2024-11-08 17:14:49,153 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:49,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 209 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 17:14:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-08 17:14:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 111. [2024-11-08 17:14:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 110 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) [2024-11-08 17:14:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2024-11-08 17:14:49,159 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 30 [2024-11-08 17:14:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:49,160 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2024-11-08 17:14:49,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 59 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) [2024-11-08 17:14:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2024-11-08 17:14:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 17:14:49,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:49,162 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:49,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 17:14:49,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:49,363 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:49,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:49,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1947889720, now seen corresponding path program 2 times [2024-11-08 17:14:49,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:49,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9552270] [2024-11-08 17:14:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:49,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:50,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:50,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9552270] [2024-11-08 17:14:50,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9552270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:14:50,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005649060] [2024-11-08 17:14:50,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:14:50,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:50,618 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:14:50,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:14:50,792 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:14:50,792 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:14:50,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-08 17:14:50,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:14:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:14:50,849 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 [2024-11-08 17:14:50,854 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 [2024-11-08 17:14:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:51,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:14:53,455 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:14:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:53,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005649060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:14:53,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:14:53,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2024-11-08 17:14:53,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238685089] [2024-11-08 17:14:53,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:14:53,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 17:14:53,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:14:53,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 17:14:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2291, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 17:14:53,554 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 51 states, 50 states have (on average 1.82) internal successors, (91), 51 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) [2024-11-08 17:14:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:14:55,209 INFO L93 Difference]: Finished difference Result 145 states and 151 transitions. [2024-11-08 17:14:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 17:14:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.82) internal successors, (91), 51 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) Word has length 31 [2024-11-08 17:14:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:14:55,210 INFO L225 Difference]: With dead ends: 145 [2024-11-08 17:14:55,210 INFO L226 Difference]: Without dead ends: 90 [2024-11-08 17:14:55,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=510, Invalid=4460, Unknown=0, NotChecked=0, Total=4970 [2024-11-08 17:14:55,212 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 17:14:55,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 17:14:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-08 17:14:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2024-11-08 17:14:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:14:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2024-11-08 17:14:55,216 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 31 [2024-11-08 17:14:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:14:55,216 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2024-11-08 17:14:55,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.82) internal successors, (91), 51 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) [2024-11-08 17:14:55,216 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2024-11-08 17:14:55,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 17:14:55,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:14:55,217 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:14:55,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 17:14:55,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-08 17:14:55,423 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:14:55,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:14:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 817726906, now seen corresponding path program 3 times [2024-11-08 17:14:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:14:55,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840877262] [2024-11-08 17:14:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:14:55,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:14:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:14:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:14:59,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:14:59,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840877262] [2024-11-08 17:14:59,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840877262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:14:59,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53667494] [2024-11-08 17:14:59,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:14:59,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:14:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:14:59,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:14:59,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:14:59,438 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-08 17:14:59,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:14:59,445 WARN L253 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-11-08 17:14:59,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:14:59,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:14:59,546 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 [2024-11-08 17:14:59,554 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 [2024-11-08 17:15:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:15:05,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:15:11,638 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:15:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:15:11,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53667494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:15:11,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:15:11,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 99 [2024-11-08 17:15:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246153414] [2024-11-08 17:15:11,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:15:11,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-08 17:15:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:15:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-08 17:15:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=9195, Unknown=0, NotChecked=0, Total=9900 [2024-11-08 17:15:11,994 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 100 states, 99 states have (on average 1.5858585858585859) internal successors, (157), 100 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) [2024-11-08 17:15:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:15:36,288 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2024-11-08 17:15:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-11-08 17:15:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.5858585858585859) internal successors, (157), 100 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) Word has length 53 [2024-11-08 17:15:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:15:36,290 INFO L225 Difference]: With dead ends: 186 [2024-11-08 17:15:36,290 INFO L226 Difference]: Without dead ends: 186 [2024-11-08 17:15:36,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7859 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=3749, Invalid=30291, Unknown=0, NotChecked=0, Total=34040 [2024-11-08 17:15:36,298 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 3238 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-08 17:15:36,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 332 Invalid, 3288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3238 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-08 17:15:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-08 17:15:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 135. [2024-11-08 17:15:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:15:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2024-11-08 17:15:36,304 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 53 [2024-11-08 17:15:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:15:36,304 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2024-11-08 17:15:36,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 1.5858585858585859) internal successors, (157), 100 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) [2024-11-08 17:15:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2024-11-08 17:15:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-08 17:15:36,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:15:36,306 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:15:36,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 17:15:36,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-08 17:15:36,507 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:15:36,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:15:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash 186410680, now seen corresponding path program 3 times [2024-11-08 17:15:36,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:15:36,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155025883] [2024-11-08 17:15:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:15:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:15:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:15:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:15:41,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:15:41,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155025883] [2024-11-08 17:15:41,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155025883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:15:41,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711336219] [2024-11-08 17:15:41,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:15:41,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:15:41,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:15:41,637 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:15:41,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:15:43,264 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-08 17:15:43,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:15:43,272 WARN L253 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 278 conjuncts are in the unsatisfiable core [2024-11-08 17:15:43,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:15:43,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:15:43,450 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 [2024-11-08 17:15:43,458 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 [2024-11-08 17:15:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:15:53,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:16:03,864 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:16:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:16:04,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711336219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:16:04,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:16:04,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 132 [2024-11-08 17:16:04,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8573635] [2024-11-08 17:16:04,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:16:04,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-08 17:16:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:16:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-08 17:16:04,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2515, Invalid=15041, Unknown=0, NotChecked=0, Total=17556 [2024-11-08 17:16:04,449 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 133 states, 132 states have (on average 1.4848484848484849) internal successors, (196), 133 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:17:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:17:03,202 INFO L93 Difference]: Finished difference Result 294 states and 296 transitions. [2024-11-08 17:17:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2024-11-08 17:17:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 1.4848484848484849) internal successors, (196), 133 states have internal predecessors, (196), 0 states have call successors, (0), 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 [2024-11-08 17:17:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:17:03,204 INFO L225 Difference]: With dead ends: 294 [2024-11-08 17:17:03,204 INFO L226 Difference]: Without dead ends: 294 [2024-11-08 17:17:03,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26331 ImplicationChecksByTransitivity, 73.7s TimeCoverageRelationStatistics Valid=12755, Invalid=78751, Unknown=0, NotChecked=0, Total=91506 [2024-11-08 17:17:03,216 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 4046 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-08 17:17:03,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 251 Invalid, 4083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4046 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-08 17:17:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-08 17:17:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 189. [2024-11-08 17:17:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:17:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2024-11-08 17:17:03,222 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 66 [2024-11-08 17:17:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:17:03,222 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2024-11-08 17:17:03,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 1.4848484848484849) internal successors, (196), 133 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:17:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2024-11-08 17:17:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-08 17:17:03,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:17:03,225 INFO L215 NwaCegarLoop]: trace histogram [36, 36, 35, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:17:03,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 17:17:03,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-08 17:17:03,426 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:17:03,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:17:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1754543430, now seen corresponding path program 4 times [2024-11-08 17:17:03,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:17:03,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351556335] [2024-11-08 17:17:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:17:03,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:17:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:17:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1895 backedges. 0 proven. 1895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:17:18,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:17:18,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351556335] [2024-11-08 17:17:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351556335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:17:18,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870159936] [2024-11-08 17:17:18,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:17:18,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:17:18,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:17:18,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:17:18,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:17:18,998 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:17:18,998 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:17:19,011 WARN L253 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 521 conjuncts are in the unsatisfiable core [2024-11-08 17:17:19,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:17:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:17:19,170 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 [2024-11-08 17:17:19,173 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 [2024-11-08 17:18:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1895 backedges. 0 proven. 1895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:18:04,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:19:01,431 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:19:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1895 backedges. 0 proven. 1895 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:19:02,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870159936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:19:02,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:19:02,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 81, 81] total 243 [2024-11-08 17:19:02,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237925225] [2024-11-08 17:19:02,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:19:02,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 244 states [2024-11-08 17:19:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:19:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2024-11-08 17:19:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4429, Invalid=54863, Unknown=0, NotChecked=0, Total=59292 [2024-11-08 17:19:02,847 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 244 states, 243 states have (on average 1.5349794238683128) internal successors, (373), 244 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:19:13,121 WARN L286 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 259 DAG size of output: 187 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:19:20,433 WARN L286 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 260 DAG size of output: 188 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:19:27,111 WARN L286 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 258 DAG size of output: 188 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:19:34,485 WARN L286 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 252 DAG size of output: 182 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:19:41,413 WARN L286 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 253 DAG size of output: 183 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:19:48,552 WARN L286 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 251 DAG size of output: 183 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:19:55,773 WARN L286 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 245 DAG size of output: 177 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:20:03,425 WARN L286 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 246 DAG size of output: 178 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:20:10,557 WARN L286 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 244 DAG size of output: 178 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:20:17,715 WARN L286 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 238 DAG size of output: 172 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:20:24,523 WARN L286 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 239 DAG size of output: 173 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:20:36,053 WARN L286 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 231 DAG size of output: 167 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:26:05,191 WARN L286 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 259 DAG size of output: 189 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-08 17:26:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:26:05,201 INFO L93 Difference]: Finished difference Result 510 states and 512 transitions. [2024-11-08 17:26:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 335 states. [2024-11-08 17:26:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 244 states, 243 states have (on average 1.5349794238683128) internal successors, (373), 244 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2024-11-08 17:26:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:26:05,204 INFO L225 Difference]: With dead ends: 510 [2024-11-08 17:26:05,204 INFO L226 Difference]: Without dead ends: 510 [2024-11-08 17:26:05,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 495 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60366 ImplicationChecksByTransitivity, 495.3s TimeCoverageRelationStatistics Valid=30114, Invalid=216398, Unknown=0, NotChecked=0, Total=246512 [2024-11-08 17:26:05,223 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 16453 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 16564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 16453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2024-11-08 17:26:05,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 794 Invalid, 16564 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [111 Valid, 16453 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2024-11-08 17:26:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-11-08 17:26:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 351. [2024-11-08 17:26:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.0085714285714287) internal successors, (353), 350 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:26:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 353 transitions. [2024-11-08 17:26:05,233 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 353 transitions. Word has length 125 [2024-11-08 17:26:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:26:05,234 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 353 transitions. [2024-11-08 17:26:05,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 244 states, 243 states have (on average 1.5349794238683128) internal successors, (373), 244 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:26:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 353 transitions. [2024-11-08 17:26:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-08 17:26:05,237 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:26:05,238 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:26:05,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 17:26:05,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:05,439 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-08 17:26:05,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:26:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash -589498056, now seen corresponding path program 4 times [2024-11-08 17:26:05,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:26:05,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565678165] [2024-11-08 17:26:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:26:05,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:26:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:26:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:26:30,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:26:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565678165] [2024-11-08 17:26:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565678165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:26:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194420215] [2024-11-08 17:26:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:26:30,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:30,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:26:30,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd6d4ad2-9fd2-44d9-b577-9fd7fc2ec5be/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:26:30,581 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:26:30,581 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:26:30,595 WARN L253 TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 745 conjuncts are in the unsatisfiable core [2024-11-08 17:26:30,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:26:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:26:30,951 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 [2024-11-08 17:26:30,955 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