./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU --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 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:04:33,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:04:33,958 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-10-31 22:04:33,965 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:04:33,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:04:34,003 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:04:34,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:04:34,006 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:04:34,007 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:04:34,007 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:04:34,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:04:34,008 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:04:34,008 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:04:34,009 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:04:34,011 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:04:34,011 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:04:34,012 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:04:34,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:04:34,016 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:04:34,016 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:04:34,016 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:04:34,017 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:04:34,033 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:04:34,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:04:34,035 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:04:34,035 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:04:34,036 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:04:34,036 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:04:34,036 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:04:34,037 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:04:34,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:04:34,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:04:34,038 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:04:34,039 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:04:34,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:04:34,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:04:34,040 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:04:34,041 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:04:34,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:04:34,041 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_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d [2024-10-31 22:04:34,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:04:34,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:04:34,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:04:34,393 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:04:34,394 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:04:34,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i Unable to find full path for "g++" [2024-10-31 22:04:36,436 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:04:36,766 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:04:36,766 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2024-10-31 22:04:36,801 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/data/449bceb97/4696eae08b4b4f1dbfd19d01423d5b60/FLAG7b5e7a237 [2024-10-31 22:04:37,022 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/data/449bceb97/4696eae08b4b4f1dbfd19d01423d5b60 [2024-10-31 22:04:37,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:04:37,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:04:37,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:04:37,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:04:37,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:04:37,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e903f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37, skipping insertion in model container [2024-10-31 22:04:37,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,113 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:04:37,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:04:37,513 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:04:37,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:04:37,591 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:04:37,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37 WrapperNode [2024-10-31 22:04:37,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:04:37,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:04:37,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:04:37,594 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:04:37,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,614 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,639 INFO L138 Inliner]: procedures = 120, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2024-10-31 22:04:37,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:04:37,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:04:37,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:04:37,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:04:37,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,656 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,679 INFO L175 MemorySlicer]: Split 12 memory accesses to 1 slices as follows [12]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2024-10-31 22:04:37,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,680 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,687 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,690 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,692 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,693 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:04:37,697 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:04:37,697 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:04:37,697 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:04:37,698 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (1/1) ... [2024-10-31 22:04:37,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:04:37,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:37,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:04:37,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:04:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-10-31 22:04:37,777 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-10-31 22:04:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-10-31 22:04:37,777 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-10-31 22:04:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:04:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:04:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:04:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:04:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:04:37,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:04:37,943 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:04:37,945 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:04:38,323 INFO L? ?]: Removed 84 outVars from TransFormulas that were not future-live. [2024-10-31 22:04:38,323 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:04:38,345 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:04:38,345 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:04:38,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:04:38 BoogieIcfgContainer [2024-10-31 22:04:38,345 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:04:38,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:04:38,378 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:04:38,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:04:38,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:04:37" (1/3) ... [2024-10-31 22:04:38,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c63df42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:04:38, skipping insertion in model container [2024-10-31 22:04:38,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:04:37" (2/3) ... [2024-10-31 22:04:38,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c63df42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:04:38, skipping insertion in model container [2024-10-31 22:04:38,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:04:38" (3/3) ... [2024-10-31 22:04:38,385 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-shared-sll-before.i [2024-10-31 22:04:38,403 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:04:38,404 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2024-10-31 22:04:38,463 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:04:38,471 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;@23103b00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:04:38,472 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-10-31 22:04:38,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 80 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:04:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-31 22:04:38,487 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:38,487 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:04:38,488 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:38,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash 37399427, now seen corresponding path program 1 times [2024-10-31 22:04:38,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:38,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845923826] [2024-10-31 22:04:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:38,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:38,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:38,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845923826] [2024-10-31 22:04:38,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845923826] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:38,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:38,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:04:38,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94755039] [2024-10-31 22:04:38,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:38,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:04:38,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:38,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:04:38,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:04:38,792 INFO L87 Difference]: Start difference. First operand has 87 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 80 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:04:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:38,909 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2024-10-31 22:04:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:04:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-31 22:04:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:38,920 INFO L225 Difference]: With dead ends: 86 [2024-10-31 22:04:38,920 INFO L226 Difference]: Without dead ends: 84 [2024-10-31 22:04:38,922 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 [2024-10-31 22:04:38,926 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:38,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:04:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-31 22:04:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-10-31 22:04:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 48 states have (on average 1.6875) internal successors, (81), 77 states have internal predecessors, (81), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:04:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2024-10-31 22:04:38,973 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 5 [2024-10-31 22:04:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:38,974 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2024-10-31 22:04:38,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:04:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2024-10-31 22:04:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-31 22:04:38,974 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:38,975 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:04:38,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:04:38,977 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:38,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash 37399428, now seen corresponding path program 1 times [2024-10-31 22:04:38,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:38,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687479107] [2024-10-31 22:04:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:38,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:39,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687479107] [2024-10-31 22:04:39,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687479107] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:39,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:39,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:04:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772955101] [2024-10-31 22:04:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:39,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:04:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:04:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:04:39,109 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:04:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:39,169 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2024-10-31 22:04:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:04:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-31 22:04:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:39,171 INFO L225 Difference]: With dead ends: 83 [2024-10-31 22:04:39,171 INFO L226 Difference]: Without dead ends: 83 [2024-10-31 22:04:39,172 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 [2024-10-31 22:04:39,173 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:39,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 148 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:04:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-31 22:04:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-10-31 22:04:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:04:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2024-10-31 22:04:39,182 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 5 [2024-10-31 22:04:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:39,183 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2024-10-31 22:04:39,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:04:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2024-10-31 22:04:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:04:39,184 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:39,184 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:39,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:04:39,187 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:39,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:39,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1862562470, now seen corresponding path program 1 times [2024-10-31 22:04:39,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:39,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648759140] [2024-10-31 22:04:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:39,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:39,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:39,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:39,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648759140] [2024-10-31 22:04:39,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648759140] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:39,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:39,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:04:39,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720563272] [2024-10-31 22:04:39,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:39,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:04:39,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:04:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:04:39,319 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:04:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:39,486 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2024-10-31 22:04:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:04:39,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-31 22:04:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:39,490 INFO L225 Difference]: With dead ends: 81 [2024-10-31 22:04:39,491 INFO L226 Difference]: Without dead ends: 81 [2024-10-31 22:04:39,492 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 [2024-10-31 22:04:39,493 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:39,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 172 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:04:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-31 22:04:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-10-31 22:04:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.625) internal successors, (78), 74 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:04:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2024-10-31 22:04:39,510 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 16 [2024-10-31 22:04:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:39,513 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2024-10-31 22:04:39,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:04:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2024-10-31 22:04:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:04:39,514 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:39,515 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:39,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:04:39,516 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:39,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:39,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1862562469, now seen corresponding path program 1 times [2024-10-31 22:04:39,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:39,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793056388] [2024-10-31 22:04:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:39,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:39,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:39,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793056388] [2024-10-31 22:04:39,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793056388] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:39,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:39,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:04:39,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769817133] [2024-10-31 22:04:39,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:39,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:04:39,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:39,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:04:39,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:04:39,760 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:04:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:39,876 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-10-31 22:04:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:04:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-31 22:04:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:39,879 INFO L225 Difference]: With dead ends: 79 [2024-10-31 22:04:39,880 INFO L226 Difference]: Without dead ends: 79 [2024-10-31 22:04:39,880 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 [2024-10-31 22:04:39,881 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:39,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 179 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:04:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-31 22:04:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-10-31 22:04:39,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:04:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2024-10-31 22:04:39,894 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 16 [2024-10-31 22:04:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:39,895 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2024-10-31 22:04:39,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:04:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2024-10-31 22:04:39,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:04:39,896 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:39,896 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:39,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:04:39,897 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:39,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:39,898 INFO L85 PathProgramCache]: Analyzing trace with hash -434415733, now seen corresponding path program 1 times [2024-10-31 22:04:39,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:39,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045380796] [2024-10-31 22:04:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:39,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:40,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:40,250 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:04:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:04:40,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045380796] [2024-10-31 22:04:40,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045380796] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80717786] [2024-10-31 22:04:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:40,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:40,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:40,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:40,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:04:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:40,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:04:40,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:40,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:04:40,622 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-10-31 22:04:40,658 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-31 22:04:40,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-31 22:04:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-10-31 22:04:40,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:40,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80717786] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:04:40,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:04:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 11 [2024-10-31 22:04:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604754487] [2024-10-31 22:04:40,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:40,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:04:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:04:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-10-31 22:04:40,930 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:04:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:41,296 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2024-10-31 22:04:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:04:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2024-10-31 22:04:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:41,297 INFO L225 Difference]: With dead ends: 84 [2024-10-31 22:04:41,300 INFO L226 Difference]: Without dead ends: 84 [2024-10-31 22:04:41,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=119, Unknown=1, NotChecked=22, Total=182 [2024-10-31 22:04:41,302 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 8 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:41,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 333 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2024-10-31 22:04:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-31 22:04:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-10-31 22:04:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 74 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 22:04:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2024-10-31 22:04:41,316 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 18 [2024-10-31 22:04:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:41,316 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2024-10-31 22:04:41,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:04:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2024-10-31 22:04:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:04:41,322 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:41,322 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:41,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:04:41,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:41,523 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:41,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash -434415732, now seen corresponding path program 1 times [2024-10-31 22:04:41,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765869914] [2024-10-31 22:04:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:41,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:42,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:04:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:04:42,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:42,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765869914] [2024-10-31 22:04:42,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765869914] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:42,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559581657] [2024-10-31 22:04:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:42,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:42,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:42,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:42,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:04:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:42,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-31 22:04:42,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:42,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:04:42,562 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-10-31 22:04:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:04:42,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:04:42,620 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:04:42,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:04:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-10-31 22:04:42,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:42,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559581657] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:42,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:04:42,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2024-10-31 22:04:42,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138172386] [2024-10-31 22:04:42,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:42,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:04:42,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:04:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=291, Unknown=1, NotChecked=34, Total=380 [2024-10-31 22:04:42,802 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:04:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:43,259 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-10-31 22:04:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:04:43,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2024-10-31 22:04:43,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:43,261 INFO L225 Difference]: With dead ends: 85 [2024-10-31 22:04:43,261 INFO L226 Difference]: Without dead ends: 85 [2024-10-31 22:04:43,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=356, Unknown=1, NotChecked=38, Total=462 [2024-10-31 22:04:43,262 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 17 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:43,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 509 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 374 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2024-10-31 22:04:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-31 22:04:43,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2024-10-31 22:04:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 73 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 22:04:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-10-31 22:04:43,269 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 18 [2024-10-31 22:04:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:43,269 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-10-31 22:04:43,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:04:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-10-31 22:04:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-31 22:04:43,270 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:43,270 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:43,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:04:43,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:04:43,471 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:43,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:43,472 INFO L85 PathProgramCache]: Analyzing trace with hash -492562465, now seen corresponding path program 1 times [2024-10-31 22:04:43,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:43,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418909630] [2024-10-31 22:04:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:43,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:43,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:43,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:43,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:43,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418909630] [2024-10-31 22:04:43,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418909630] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:43,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:43,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:04:43,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539299382] [2024-10-31 22:04:43,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:43,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:04:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:04:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:04:43,607 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:04:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:43,774 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2024-10-31 22:04:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:04:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-10-31 22:04:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:43,777 INFO L225 Difference]: With dead ends: 83 [2024-10-31 22:04:43,777 INFO L226 Difference]: Without dead ends: 83 [2024-10-31 22:04:43,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:04:43,778 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 11 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:43,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 272 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:04:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-31 22:04:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2024-10-31 22:04:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 70 states have internal predecessors, (75), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 22:04:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2024-10-31 22:04:43,794 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 22 [2024-10-31 22:04:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:43,794 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2024-10-31 22:04:43,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:04:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2024-10-31 22:04:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-31 22:04:43,796 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:43,796 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:43,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:04:43,799 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:43,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash -492562464, now seen corresponding path program 1 times [2024-10-31 22:04:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:43,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310462339] [2024-10-31 22:04:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:43,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:43,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:44,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:44,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310462339] [2024-10-31 22:04:44,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310462339] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:44,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:44,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:04:44,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205084019] [2024-10-31 22:04:44,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:44,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:04:44,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:04:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:04:44,126 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:04:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:44,276 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2024-10-31 22:04:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:04:44,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-10-31 22:04:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:44,278 INFO L225 Difference]: With dead ends: 82 [2024-10-31 22:04:44,278 INFO L226 Difference]: Without dead ends: 82 [2024-10-31 22:04:44,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:04:44,279 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 5 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:44,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 309 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:04:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-31 22:04:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2024-10-31 22:04:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 69 states have internal predecessors, (74), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 22:04:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2024-10-31 22:04:44,289 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 22 [2024-10-31 22:04:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:44,289 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2024-10-31 22:04:44,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:04:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2024-10-31 22:04:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-31 22:04:44,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:44,291 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:44,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:04:44,292 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:44,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:44,293 INFO L85 PathProgramCache]: Analyzing trace with hash 997710085, now seen corresponding path program 1 times [2024-10-31 22:04:44,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:44,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020956426] [2024-10-31 22:04:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:44,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:44,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:44,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:44,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020956426] [2024-10-31 22:04:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020956426] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:44,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:44,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-31 22:04:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537709047] [2024-10-31 22:04:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:44,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:04:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:04:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:04:44,652 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:04:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:45,045 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2024-10-31 22:04:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:04:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-10-31 22:04:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:45,046 INFO L225 Difference]: With dead ends: 78 [2024-10-31 22:04:45,047 INFO L226 Difference]: Without dead ends: 78 [2024-10-31 22:04:45,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:04:45,048 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:45,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 321 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:04:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-31 22:04:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-10-31 22:04:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 70 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 22:04:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2024-10-31 22:04:45,059 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 28 [2024-10-31 22:04:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:45,060 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2024-10-31 22:04:45,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:04:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2024-10-31 22:04:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-31 22:04:45,061 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:45,061 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:45,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:04:45,061 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:45,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash 997710086, now seen corresponding path program 1 times [2024-10-31 22:04:45,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:45,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126400782] [2024-10-31 22:04:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:45,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:45,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:45,592 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:45,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:45,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126400782] [2024-10-31 22:04:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126400782] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:45,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:45,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-10-31 22:04:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249491970] [2024-10-31 22:04:45,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:45,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:04:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:04:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:04:45,704 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:04:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:46,137 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2024-10-31 22:04:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:04:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-10-31 22:04:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:46,138 INFO L225 Difference]: With dead ends: 92 [2024-10-31 22:04:46,138 INFO L226 Difference]: Without dead ends: 92 [2024-10-31 22:04:46,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:04:46,139 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:46,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 374 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:04:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-31 22:04:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2024-10-31 22:04:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.4) internal successors, (91), 82 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:04:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-10-31 22:04:46,144 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2024-10-31 22:04:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:46,144 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-10-31 22:04:46,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:04:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-10-31 22:04:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:04:46,145 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:46,145 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:46,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:04:46,145 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:46,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1052903553, now seen corresponding path program 1 times [2024-10-31 22:04:46,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:46,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155689296] [2024-10-31 22:04:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:46,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:46,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:46,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:04:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:46,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-31 22:04:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:04:46,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155689296] [2024-10-31 22:04:46,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155689296] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207378157] [2024-10-31 22:04:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:46,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:46,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:46,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:46,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:04:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:46,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:04:46,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:46,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:04:46,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:04:46,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-31 22:04:46,617 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-10-31 22:04:46,641 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-31 22:04:46,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-31 22:04:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-10-31 22:04:46,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:04:46,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207378157] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:04:46,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:04:46,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 13 [2024-10-31 22:04:46,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191571202] [2024-10-31 22:04:46,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:46,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:04:46,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:04:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2024-10-31 22:04:46,829 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:04:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:47,145 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2024-10-31 22:04:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:04:47,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2024-10-31 22:04:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:47,146 INFO L225 Difference]: With dead ends: 90 [2024-10-31 22:04:47,146 INFO L226 Difference]: Without dead ends: 90 [2024-10-31 22:04:47,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=223, Unknown=1, NotChecked=30, Total=306 [2024-10-31 22:04:47,147 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:47,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 406 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2024-10-31 22:04:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-31 22:04:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-10-31 22:04:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 81 states have internal predecessors, (90), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:04:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2024-10-31 22:04:47,152 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 30 [2024-10-31 22:04:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:47,152 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2024-10-31 22:04:47,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:04:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2024-10-31 22:04:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:04:47,153 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:47,153 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:47,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:04:47,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:04:47,358 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:47,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:47,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1052903554, now seen corresponding path program 1 times [2024-10-31 22:04:47,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:47,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176451649] [2024-10-31 22:04:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:47,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:47,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:47,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:04:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:47,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-31 22:04:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:04:47,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:47,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176451649] [2024-10-31 22:04:47,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176451649] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:47,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038534906] [2024-10-31 22:04:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:47,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:47,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:47,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:47,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:04:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:48,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-31 22:04:48,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:48,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:04:48,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:04:48,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:04:48,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:04:48,215 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 26 treesize of output 14 [2024-10-31 22:04:48,341 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-10-31 22:04:48,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:04:48,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:04:48,383 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:04:48,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:04:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-10-31 22:04:48,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:48,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038534906] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:48,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:04:48,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2024-10-31 22:04:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59463233] [2024-10-31 22:04:48,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:48,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:04:48,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:04:48,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2024-10-31 22:04:48,571 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:04:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:49,328 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2024-10-31 22:04:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:04:49,328 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2024-10-31 22:04:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:49,329 INFO L225 Difference]: With dead ends: 91 [2024-10-31 22:04:49,332 INFO L226 Difference]: Without dead ends: 91 [2024-10-31 22:04:49,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=610, Unknown=1, NotChecked=50, Total=756 [2024-10-31 22:04:49,333 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 10 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:49,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 654 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 485 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2024-10-31 22:04:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-31 22:04:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2024-10-31 22:04:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.375) internal successors, (88), 79 states have internal predecessors, (88), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 22:04:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2024-10-31 22:04:49,343 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 30 [2024-10-31 22:04:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:49,343 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2024-10-31 22:04:49,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:04:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2024-10-31 22:04:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:04:49,344 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:49,345 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:49,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:04:49,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:49,545 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:49,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:49,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1021640053, now seen corresponding path program 1 times [2024-10-31 22:04:49,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:49,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922952203] [2024-10-31 22:04:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:49,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:49,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:49,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:49,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:49,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922952203] [2024-10-31 22:04:49,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922952203] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:49,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:49,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-31 22:04:49,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550287716] [2024-10-31 22:04:49,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:49,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:04:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:04:49,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:04:49,718 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:04:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:49,843 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2024-10-31 22:04:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:04:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-10-31 22:04:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:49,845 INFO L225 Difference]: With dead ends: 92 [2024-10-31 22:04:49,845 INFO L226 Difference]: Without dead ends: 92 [2024-10-31 22:04:49,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:04:49,845 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 25 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:49,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 498 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:04:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-31 22:04:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2024-10-31 22:04:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.34375) internal successors, (86), 79 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 22:04:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-10-31 22:04:49,849 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 30 [2024-10-31 22:04:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:49,849 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-10-31 22:04:49,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:04:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-10-31 22:04:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 22:04:49,850 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:49,851 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:49,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:04:49,851 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:49,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1607511573, now seen corresponding path program 1 times [2024-10-31 22:04:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723026325] [2024-10-31 22:04:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:49,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:50,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:50,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:50,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723026325] [2024-10-31 22:04:50,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723026325] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:50,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:04:50,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 22:04:50,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590818965] [2024-10-31 22:04:50,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:50,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:04:50,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:50,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:04:50,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:04:50,026 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:04:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:50,209 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2024-10-31 22:04:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:04:50,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2024-10-31 22:04:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:50,210 INFO L225 Difference]: With dead ends: 91 [2024-10-31 22:04:50,210 INFO L226 Difference]: Without dead ends: 91 [2024-10-31 22:04:50,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:04:50,211 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 21 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:50,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 432 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:04:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-31 22:04:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2024-10-31 22:04:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 82 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-31 22:04:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2024-10-31 22:04:50,215 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 31 [2024-10-31 22:04:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:50,215 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2024-10-31 22:04:50,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:04:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2024-10-31 22:04:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-31 22:04:50,216 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:50,216 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:50,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:04:50,217 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:50,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash 290017258, now seen corresponding path program 1 times [2024-10-31 22:04:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:50,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640522165] [2024-10-31 22:04:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:50,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:50,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:50,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:04:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:04:50,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:50,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640522165] [2024-10-31 22:04:50,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640522165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:50,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993225047] [2024-10-31 22:04:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:50,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:50,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:50,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:50,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:04:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:50,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:04:50,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:50,598 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2024-10-31 22:04:50,643 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-31 22:04:50,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-31 22:04:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:50,646 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:04:50,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993225047] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:04:50,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:04:50,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-10-31 22:04:50,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130296892] [2024-10-31 22:04:50,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:04:50,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:04:50,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:50,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:04:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2024-10-31 22:04:50,648 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:04:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:50,712 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2024-10-31 22:04:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:04:50,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-10-31 22:04:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:50,714 INFO L225 Difference]: With dead ends: 96 [2024-10-31 22:04:50,714 INFO L226 Difference]: Without dead ends: 96 [2024-10-31 22:04:50,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2024-10-31 22:04:50,715 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:50,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2024-10-31 22:04:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-31 22:04:50,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2024-10-31 22:04:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 85 states have internal predecessors, (95), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:04:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2024-10-31 22:04:50,718 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 32 [2024-10-31 22:04:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:50,718 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2024-10-31 22:04:50,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:04:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2024-10-31 22:04:50,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-31 22:04:50,719 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:50,719 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:50,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:04:50,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:04:50,923 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:50,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash 290017259, now seen corresponding path program 1 times [2024-10-31 22:04:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:50,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711208475] [2024-10-31 22:04:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:50,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:51,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:51,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:51,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:04:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:04:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711208475] [2024-10-31 22:04:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711208475] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62419145] [2024-10-31 22:04:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:51,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:51,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:51,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:04:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:51,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-31 22:04:51,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:51,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:04:51,686 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-10-31 22:04:51,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:04:51,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:04:51,731 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:04:51,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:04:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-10-31 22:04:51,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62419145] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:51,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:04:51,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2024-10-31 22:04:51,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063334974] [2024-10-31 22:04:51,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:51,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:04:51,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:04:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=288, Unknown=1, NotChecked=34, Total=380 [2024-10-31 22:04:51,864 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:04:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:52,233 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2024-10-31 22:04:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:04:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2024-10-31 22:04:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:52,234 INFO L225 Difference]: With dead ends: 103 [2024-10-31 22:04:52,234 INFO L226 Difference]: Without dead ends: 103 [2024-10-31 22:04:52,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=354, Unknown=1, NotChecked=38, Total=462 [2024-10-31 22:04:52,235 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 11 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:52,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 440 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 289 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2024-10-31 22:04:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-31 22:04:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2024-10-31 22:04:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 90 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:04:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2024-10-31 22:04:52,240 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 32 [2024-10-31 22:04:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:52,241 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2024-10-31 22:04:52,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 13 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:04:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2024-10-31 22:04:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 22:04:52,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:52,242 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:52,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:04:52,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:04:52,446 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:04:52,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:52,447 INFO L85 PathProgramCache]: Analyzing trace with hash 492043658, now seen corresponding path program 1 times [2024-10-31 22:04:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:52,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684923321] [2024-10-31 22:04:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:53,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:53,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:04:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:53,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684923321] [2024-10-31 22:04:53,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684923321] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721338264] [2024-10-31 22:04:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:53,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:53,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:53,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:04:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:53,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-31 22:04:53,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:53,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:04:53,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:04:53,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:04:54,136 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:04:54,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:04:58,146 WARN L851 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (or (= (select (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (exists ((|v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_#memory_$Pointer$#0.offset|))) (and (= |c_#memory_$Pointer$#0.offset| (store |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| .cse0 (select |c_#memory_$Pointer$#0.offset| .cse0))) (= |c_ULTIMATE.start_create_#t~ret9#1.base| .cse0) (= (select (select |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))))) (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) is different from false [2024-10-31 22:04:58,149 WARN L873 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (or (= (select (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0) (exists ((|v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_#memory_$Pointer$#0.offset|))) (and (= |c_#memory_$Pointer$#0.offset| (store |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| .cse0 (select |c_#memory_$Pointer$#0.offset| .cse0))) (= |c_ULTIMATE.start_create_#t~ret9#1.base| .cse0) (= (select (select |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))))) (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) is different from true [2024-10-31 22:04:58,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:04:58,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:04:58,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:04:58,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-31 22:04:58,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:04:58,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-31 22:04:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:04:58,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:58,679 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_706 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_706) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (forall ((v_ArrVal_705 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_705) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2024-10-31 22:04:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721338264] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:59,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:04:59,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 33 [2024-10-31 22:04:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53833910] [2024-10-31 22:04:59,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:59,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-31 22:04:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-31 22:04:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1163, Unknown=20, NotChecked=138, Total=1406 [2024-10-31 22:04:59,045 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 33 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 27 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:04:59,685 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|))) (let ((.cse1 (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|)) (.cse2 (= (select .cse0 0) 0))) (and (= (select .cse0 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (= (select .cse1 0) 0) (= (select .cse1 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (or .cse2 (exists ((|v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse3 (@diff |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_#memory_$Pointer$#0.offset|))) (and (= |c_#memory_$Pointer$#0.offset| (store |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| .cse3 (select |c_#memory_$Pointer$#0.offset| .cse3))) (= |c_ULTIMATE.start_create_#t~ret9#1.base| .cse3) (= (select (select |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))))) .cse2 (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))))) is different from false [2024-10-31 22:04:59,688 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~shared~0#1.base|))) (let ((.cse1 (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|)) (.cse2 (= (select .cse0 0) 0))) (and (= (select .cse0 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (= (select .cse1 0) 0) (= (select .cse1 |c_ULTIMATE.start_main_~shared~0#1.offset|) 0) (or .cse2 (exists ((|v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| (Array Int (Array Int Int)))) (let ((.cse3 (@diff |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_#memory_$Pointer$#0.offset|))) (and (= |c_#memory_$Pointer$#0.offset| (store |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| .cse3 (select |c_#memory_$Pointer$#0.offset| .cse3))) (= |c_ULTIMATE.start_create_#t~ret9#1.base| .cse3) (= (select (select |v_#memory_$Pointer$#0.offset_BEFORE_CALL_2| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))))) .cse2 (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))))) is different from true [2024-10-31 22:05:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:00,430 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2024-10-31 22:05:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 22:05:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 27 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2024-10-31 22:05:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:00,432 INFO L225 Difference]: With dead ends: 104 [2024-10-31 22:05:00,432 INFO L226 Difference]: Without dead ends: 104 [2024-10-31 22:05:00,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=147, Invalid=2002, Unknown=25, NotChecked=276, Total=2450 [2024-10-31 22:05:00,434 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 18 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:00,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1091 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 997 Invalid, 0 Unknown, 128 Unchecked, 0.8s Time] [2024-10-31 22:05:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-31 22:05:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2024-10-31 22:05:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 93 states have internal predecessors, (104), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2024-10-31 22:05:00,439 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 34 [2024-10-31 22:05:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:00,439 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2024-10-31 22:05:00,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 27 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:05:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2024-10-31 22:05:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 22:05:00,440 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:00,441 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:00,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:05:00,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:05:00,646 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:05:00,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1570038634, now seen corresponding path program 1 times [2024-10-31 22:05:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:00,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033838967] [2024-10-31 22:05:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:00,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:01,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:05:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:01,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:05:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:01,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:05:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:01,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033838967] [2024-10-31 22:05:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033838967] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:01,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:01,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:05:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420810291] [2024-10-31 22:05:01,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:01,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:05:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:05:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:05:01,190 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:05:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:01,361 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2024-10-31 22:05:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:05:01,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-31 22:05:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:01,362 INFO L225 Difference]: With dead ends: 101 [2024-10-31 22:05:01,363 INFO L226 Difference]: Without dead ends: 101 [2024-10-31 22:05:01,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:05:01,364 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 4 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:01,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 342 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-10-31 22:05:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-10-31 22:05:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 92 states have internal predecessors, (102), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2024-10-31 22:05:01,370 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 35 [2024-10-31 22:05:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:01,371 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2024-10-31 22:05:01,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:05:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2024-10-31 22:05:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 22:05:01,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:01,372 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:01,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 22:05:01,372 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:05:01,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:01,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1570038635, now seen corresponding path program 1 times [2024-10-31 22:05:01,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:01,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993609779] [2024-10-31 22:05:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:01,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:01,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:05:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:01,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:05:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:01,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:05:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:05:01,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:01,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993609779] [2024-10-31 22:05:01,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993609779] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:01,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:01,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:05:01,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112920674] [2024-10-31 22:05:01,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:01,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:05:01,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:05:01,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:05:01,542 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:05:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:01,695 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2024-10-31 22:05:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:05:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-31 22:05:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:01,696 INFO L225 Difference]: With dead ends: 100 [2024-10-31 22:05:01,696 INFO L226 Difference]: Without dead ends: 100 [2024-10-31 22:05:01,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:05:01,697 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 3 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:01,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 316 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-31 22:05:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-10-31 22:05:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 91 states have internal predecessors, (100), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2024-10-31 22:05:01,702 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 35 [2024-10-31 22:05:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:01,703 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2024-10-31 22:05:01,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:05:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2024-10-31 22:05:01,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 22:05:01,704 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:01,705 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:01,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 22:05:01,705 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:05:01,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:01,705 INFO L85 PathProgramCache]: Analyzing trace with hash 407508154, now seen corresponding path program 1 times [2024-10-31 22:05:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:01,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357395756] [2024-10-31 22:05:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:01,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:01,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:02,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:05:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:02,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:05:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:02,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:02,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357395756] [2024-10-31 22:05:02,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357395756] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:02,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097869248] [2024-10-31 22:05:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:02,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:02,225 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:02,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:05:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:02,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-31 22:05:02,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:02,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:05:02,479 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:05:02,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:05:02,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:05:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:02,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:05:02,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:05:02,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-10-31 22:05:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:02,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097869248] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:05:02,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:05:02,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2024-10-31 22:05:02,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174750681] [2024-10-31 22:05:02,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:05:02,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-31 22:05:02,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-31 22:05:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2024-10-31 22:05:02,999 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:05:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:04,181 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2024-10-31 22:05:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-31 22:05:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2024-10-31 22:05:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:04,182 INFO L225 Difference]: With dead ends: 127 [2024-10-31 22:05:04,183 INFO L226 Difference]: Without dead ends: 127 [2024-10-31 22:05:04,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2024-10-31 22:05:04,184 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 79 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:04,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 528 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 22:05:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-31 22:05:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2024-10-31 22:05:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.2903225806451613) internal successors, (120), 105 states have internal predecessors, (120), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2024-10-31 22:05:04,189 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 36 [2024-10-31 22:05:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:04,190 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2024-10-31 22:05:04,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 22 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:05:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2024-10-31 22:05:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 22:05:04,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:04,191 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:04,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:05:04,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6914bf-d7da-4b92-bd95-f53900b7edac/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:04,395 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:05:04,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash 407508155, now seen corresponding path program 1 times [2024-10-31 22:05:04,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:04,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660207001] [2024-10-31 22:05:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:04,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:05:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:04,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:05:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:04,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:04,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660207001] [2024-10-31 22:05:04,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660207001] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:04,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:04,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 22:05:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536934529] [2024-10-31 22:05:04,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:04,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:05:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:05:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:05:04,711 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:04,967 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2024-10-31 22:05:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:05:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2024-10-31 22:05:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:04,969 INFO L225 Difference]: With dead ends: 141 [2024-10-31 22:05:04,969 INFO L226 Difference]: Without dead ends: 141 [2024-10-31 22:05:04,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:05:04,970 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:04,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:05:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-31 22:05:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2024-10-31 22:05:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 116 states have (on average 1.3275862068965518) internal successors, (154), 128 states have internal predecessors, (154), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2024-10-31 22:05:04,977 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 36 [2024-10-31 22:05:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:04,977 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2024-10-31 22:05:04,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2024-10-31 22:05:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-31 22:05:04,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:04,979 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:04,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-31 22:05:04,979 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:05:04,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash -252150541, now seen corresponding path program 1 times [2024-10-31 22:05:04,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:04,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563480779] [2024-10-31 22:05:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:04,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:05,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:05:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:05,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:05:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:05,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:05,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563480779] [2024-10-31 22:05:05,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563480779] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:05,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:05,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-31 22:05:05,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041561330] [2024-10-31 22:05:05,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:05,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:05:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:05,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:05:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:05:05,124 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:05,264 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2024-10-31 22:05:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:05:05,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2024-10-31 22:05:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:05,277 INFO L225 Difference]: With dead ends: 144 [2024-10-31 22:05:05,278 INFO L226 Difference]: Without dead ends: 144 [2024-10-31 22:05:05,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:05:05,279 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 22 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:05,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 468 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-31 22:05:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2024-10-31 22:05:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.2991452991452992) internal successors, (152), 129 states have internal predecessors, (152), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2024-10-31 22:05:05,285 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 37 [2024-10-31 22:05:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:05,286 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2024-10-31 22:05:05,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2024-10-31 22:05:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 22:05:05,286 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:05,287 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:05,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-31 22:05:05,287 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:05:05,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:05,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1797049481, now seen corresponding path program 1 times [2024-10-31 22:05:05,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:05,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536196996] [2024-10-31 22:05:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:05,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:05,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:05:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:05,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 22:05:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:05:05,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:05,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536196996] [2024-10-31 22:05:05,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536196996] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:05,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:05,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-31 22:05:05,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404465922] [2024-10-31 22:05:05,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:05,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:05:05,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:05,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:05:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:05:05,570 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:05,764 INFO L93 Difference]: Finished difference Result 143 states and 171 transitions. [2024-10-31 22:05:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:05:05,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-10-31 22:05:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:05,765 INFO L225 Difference]: With dead ends: 143 [2024-10-31 22:05:05,765 INFO L226 Difference]: Without dead ends: 143 [2024-10-31 22:05:05,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:05:05,766 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:05,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 426 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:05:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-31 22:05:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2024-10-31 22:05:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 121 states have (on average 1.3140495867768596) internal successors, (159), 133 states have internal predecessors, (159), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2024-10-31 22:05:05,773 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 39 [2024-10-31 22:05:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:05,773 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2024-10-31 22:05:05,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2024-10-31 22:05:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-31 22:05:05,774 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:05,774 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:05,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-31 22:05:05,775 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-31 22:05:05,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash -884584836, now seen corresponding path program 1 times [2024-10-31 22:05:05,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:05,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073881405] [2024-10-31 22:05:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:05,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat