./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/cstrchr-alloca-1.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_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/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_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/cstrchr-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/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_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/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 312f51ef4503f0fc4b94d177cfa21e5892ce6df837fb8c86c4b09d81ecb9ffbb --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:11:34,706 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:11:34,821 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-10-31 22:11:34,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:11:34,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:11:34,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:11:34,876 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:11:34,877 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:11:34,878 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:11:34,879 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:11:34,880 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:11:34,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:11:34,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:11:34,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:11:34,883 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:11:34,884 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:11:34,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:11:34,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:11:34,885 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:11:34,885 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:11:34,890 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:11:34,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:11:34,891 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:11:34,891 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:11:34,891 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:11:34,891 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:11:34,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:11:34,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:11:34,892 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:11:34,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:11:34,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:34,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:11:34,895 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:11:34,895 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:11:34,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:11:34,896 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:11:34,896 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:11:34,896 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:11:34,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:11:34,896 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_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 312f51ef4503f0fc4b94d177cfa21e5892ce6df837fb8c86c4b09d81ecb9ffbb [2024-10-31 22:11:35,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:11:35,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:11:35,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:11:35,217 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:11:35,217 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:11:35,219 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/termination-memory-alloca/cstrchr-alloca-1.i Unable to find full path for "g++" [2024-10-31 22:11:37,349 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:11:37,658 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:11:37,659 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/sv-benchmarks/c/termination-memory-alloca/cstrchr-alloca-1.i [2024-10-31 22:11:37,672 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/data/44ad21a98/db42bdf4f2664625bdf38cea92755eba/FLAGef0381b28 [2024-10-31 22:11:37,688 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/data/44ad21a98/db42bdf4f2664625bdf38cea92755eba [2024-10-31 22:11:37,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:11:37,696 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:11:37,697 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:37,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:11:37,704 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:11:37,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f800a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:37, skipping insertion in model container [2024-10-31 22:11:37,706 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:37" (1/1) ... [2024-10-31 22:11:37,757 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:11:38,150 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:11:38,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:38,168 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:11:38,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:38,246 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:11:38,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38 WrapperNode [2024-10-31 22:11:38,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:38,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:38,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:11:38,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:11:38,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,297 INFO L138 Inliner]: procedures = 111, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2024-10-31 22:11:38,297 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:38,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:11:38,298 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:11:38,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:11:38,310 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,314 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,328 INFO L175 MemorySlicer]: Split 4 memory accesses to 1 slices as follows [4]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-10-31 22:11:38,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,334 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,337 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,338 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,339 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,341 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:11:38,345 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:11:38,346 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:11:38,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:11:38,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (1/1) ... [2024-10-31 22:11:38,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:38,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:11:38,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:11:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:11:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:11:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:11:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:11:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:11:38,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:11:38,542 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:11:38,545 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:11:38,738 INFO L? ?]: Removed 35 outVars from TransFormulas that were not future-live. [2024-10-31 22:11:38,738 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:11:38,759 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:11:38,760 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:11:38,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:38 BoogieIcfgContainer [2024-10-31 22:11:38,760 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:11:38,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:11:38,766 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:11:38,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:11:38,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:11:37" (1/3) ... [2024-10-31 22:11:38,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fae177a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:38, skipping insertion in model container [2024-10-31 22:11:38,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:38" (2/3) ... [2024-10-31 22:11:38,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fae177a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:38, skipping insertion in model container [2024-10-31 22:11:38,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:38" (3/3) ... [2024-10-31 22:11:38,772 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-1.i [2024-10-31 22:11:38,785 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:11:38,785 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-10-31 22:11:38,831 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:38,837 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;@73a6aba3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:38,837 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-10-31 22:11:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-31 22:11:38,848 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:38,848 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:11:38,849 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:38,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:38,855 INFO L85 PathProgramCache]: Analyzing trace with hash 28693828, now seen corresponding path program 1 times [2024-10-31 22:11:38,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:38,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645460189] [2024-10-31 22:11:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:38,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:39,166 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 22:11:39,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:39,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645460189] [2024-10-31 22:11:39,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645460189] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:39,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:39,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:39,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514450591] [2024-10-31 22:11:39,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:39,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:39,238 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:39,295 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-10-31 22:11:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:39,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-31 22:11:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:39,308 INFO L225 Difference]: With dead ends: 26 [2024-10-31 22:11:39,309 INFO L226 Difference]: Without dead ends: 24 [2024-10-31 22:11:39,311 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 22:11:39,316 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:39,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-31 22:11:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-31 22:11:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-10-31 22:11:39,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 5 [2024-10-31 22:11:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:39,357 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-10-31 22:11:39,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-10-31 22:11:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-31 22:11:39,359 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:39,360 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:11:39,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:11:39,361 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:39,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash 28693829, now seen corresponding path program 1 times [2024-10-31 22:11:39,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950667932] [2024-10-31 22:11:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:39,698 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 22:11:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950667932] [2024-10-31 22:11:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950667932] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:39,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:39,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222035972] [2024-10-31 22:11:39,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:39,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:39,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:39,704 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:39,747 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-10-31 22:11:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:39,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-31 22:11:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:39,754 INFO L225 Difference]: With dead ends: 26 [2024-10-31 22:11:39,754 INFO L226 Difference]: Without dead ends: 26 [2024-10-31 22:11:39,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:39,756 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:39,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-31 22:11:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-31 22:11:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-10-31 22:11:39,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 5 [2024-10-31 22:11:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:39,773 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-10-31 22:11:39,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-10-31 22:11:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-31 22:11:39,780 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:39,780 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:11:39,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:11:39,781 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:39,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 28695751, now seen corresponding path program 1 times [2024-10-31 22:11:39,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:39,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090287694] [2024-10-31 22:11:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:40,076 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 22:11:40,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:40,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090287694] [2024-10-31 22:11:40,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090287694] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:40,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:40,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:11:40,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423037528] [2024-10-31 22:11:40,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:40,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:40,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:40,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:40,080 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:40,102 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-10-31 22:11:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:11:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-31 22:11:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:40,106 INFO L225 Difference]: With dead ends: 25 [2024-10-31 22:11:40,106 INFO L226 Difference]: Without dead ends: 25 [2024-10-31 22:11:40,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:40,108 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:40,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-31 22:11:40,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2024-10-31 22:11:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.5625) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-10-31 22:11:40,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 5 [2024-10-31 22:11:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:40,119 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-10-31 22:11:40,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-10-31 22:11:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:11:40,120 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:40,120 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:40,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:11:40,122 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:40,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964393, now seen corresponding path program 1 times [2024-10-31 22:11:40,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282412291] [2024-10-31 22:11:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:40,233 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 22:11:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:40,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282412291] [2024-10-31 22:11:40,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282412291] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:40,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:40,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944135001] [2024-10-31 22:11:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:40,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:40,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:40,236 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:40,303 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2024-10-31 22:11:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:11:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:40,305 INFO L225 Difference]: With dead ends: 20 [2024-10-31 22:11:40,305 INFO L226 Difference]: Without dead ends: 20 [2024-10-31 22:11:40,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:40,306 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:40,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-31 22:11:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-31 22:11:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-10-31 22:11:40,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2024-10-31 22:11:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:40,314 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-10-31 22:11:40,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-10-31 22:11:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:11:40,317 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:40,317 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:40,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:11:40,318 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:40,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964394, now seen corresponding path program 1 times [2024-10-31 22:11:40,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69830496] [2024-10-31 22:11:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:40,659 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 22:11:40,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:40,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69830496] [2024-10-31 22:11:40,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69830496] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:40,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:40,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:11:40,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366495235] [2024-10-31 22:11:40,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:40,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:11:40,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:11:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:11:40,663 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:40,726 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-10-31 22:11:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:11:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:11:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:40,728 INFO L225 Difference]: With dead ends: 28 [2024-10-31 22:11:40,728 INFO L226 Difference]: Without dead ends: 28 [2024-10-31 22:11:40,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:11:40,729 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:40,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-31 22:11:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-10-31 22:11:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-10-31 22:11:40,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 7 [2024-10-31 22:11:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:40,734 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-10-31 22:11:40,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-10-31 22:11:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:11:40,735 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:40,735 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:40,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:11:40,736 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:40,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1531298047, now seen corresponding path program 1 times [2024-10-31 22:11:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202003278] [2024-10-31 22:11:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202003278] [2024-10-31 22:11:40,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202003278] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:40,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:40,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:40,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804230520] [2024-10-31 22:11:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:40,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:40,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:40,779 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:40,803 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-10-31 22:11:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:40,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:11:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:40,804 INFO L225 Difference]: With dead ends: 29 [2024-10-31 22:11:40,804 INFO L226 Difference]: Without dead ends: 29 [2024-10-31 22:11:40,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:40,806 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:40,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-31 22:11:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-31 22:11:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-10-31 22:11:40,813 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2024-10-31 22:11:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:40,814 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-10-31 22:11:40,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-10-31 22:11:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-31 22:11:40,815 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:40,815 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:40,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:11:40,816 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:40,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:40,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1590499358, now seen corresponding path program 1 times [2024-10-31 22:11:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:40,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236964357] [2024-10-31 22:11:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:40,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:41,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:41,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236964357] [2024-10-31 22:11:41,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236964357] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:41,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:41,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:11:41,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515510290] [2024-10-31 22:11:41,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:41,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:11:41,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:41,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:11:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:11:41,150 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:41,286 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-10-31 22:11:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:11:41,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-31 22:11:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:41,287 INFO L225 Difference]: With dead ends: 38 [2024-10-31 22:11:41,287 INFO L226 Difference]: Without dead ends: 38 [2024-10-31 22:11:41,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:11:41,289 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:41,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:11:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-31 22:11:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-10-31 22:11:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-10-31 22:11:41,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2024-10-31 22:11:41,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:41,296 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-10-31 22:11:41,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-10-31 22:11:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-31 22:11:41,298 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:41,299 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:41,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:11:41,299 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:41,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:41,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2003403360, now seen corresponding path program 1 times [2024-10-31 22:11:41,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:41,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378045295] [2024-10-31 22:11:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:41,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,765 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 22:11:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:41,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378045295] [2024-10-31 22:11:41,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378045295] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:41,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560833087] [2024-10-31 22:11:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:41,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:41,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:41,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:41,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:11:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:41,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 22:11:41,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:41,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-31 22:11:42,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:11:42,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-10-31 22:11:42,441 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 22:11:42,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:42,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-31 22:11:42,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-31 22:11:42,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-31 22:11:42,930 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 22:11:42,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560833087] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:42,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:42,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-10-31 22:11:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105125533] [2024-10-31 22:11:42,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:42,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-31 22:11:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-31 22:11:42,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:11:42,934 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 21 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:43,429 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-10-31 22:11:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:11:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-31 22:11:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:43,431 INFO L225 Difference]: With dead ends: 45 [2024-10-31 22:11:43,432 INFO L226 Difference]: Without dead ends: 45 [2024-10-31 22:11:43,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2024-10-31 22:11:43,433 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:43,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 77 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:11:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-31 22:11:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2024-10-31 22:11:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-10-31 22:11:43,439 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 13 [2024-10-31 22:11:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:43,440 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-10-31 22:11:43,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-10-31 22:11:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:11:43,440 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:43,441 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:43,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:11:43,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:43,642 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:43,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2053675818, now seen corresponding path program 1 times [2024-10-31 22:11:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229310898] [2024-10-31 22:11:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:43,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:43,733 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 22:11:43,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:43,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229310898] [2024-10-31 22:11:43,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229310898] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:43,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:43,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:43,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562053915] [2024-10-31 22:11:43,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:43,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:43,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:43,736 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:11:43,758 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-10-31 22:11:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-31 22:11:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:11:43,759 INFO L225 Difference]: With dead ends: 31 [2024-10-31 22:11:43,759 INFO L226 Difference]: Without dead ends: 20 [2024-10-31 22:11:43,760 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 22:11:43,760 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:11:43,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:11:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-31 22:11:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-31 22:11:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2024-10-31 22:11:43,764 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 14 [2024-10-31 22:11:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:11:43,764 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2024-10-31 22:11:43,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:11:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2024-10-31 22:11:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-31 22:11:43,765 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:11:43,766 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:43,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:11:43,766 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:11:43,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1985024788, now seen corresponding path program 2 times [2024-10-31 22:11:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:43,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076268139] [2024-10-31 22:11:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:43,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:44,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076268139] [2024-10-31 22:11:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076268139] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:11:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694308473] [2024-10-31 22:11:44,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:11:44,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:11:44,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:44,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:11:44,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:11:44,685 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:11:44,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:11:44,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-31 22:11:44,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:11:44,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-31 22:11:45,918 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2024-10-31 22:11:45,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 23 [2024-10-31 22:11:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:46,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:11:46,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-10-31 22:11:46,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-31 22:11:46,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2024-10-31 22:11:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:46,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694308473] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:11:46,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:11:46,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2024-10-31 22:11:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5595919] [2024-10-31 22:11:46,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:11:46,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-31 22:11:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-31 22:11:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=869, Unknown=1, NotChecked=0, Total=992 [2024-10-31 22:11:46,965 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:05,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:12:06,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:12:06,305 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2024-10-31 22:12:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-31 22:12:06,306 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-31 22:12:06,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:12:06,307 INFO L225 Difference]: With dead ends: 43 [2024-10-31 22:12:06,307 INFO L226 Difference]: Without dead ends: 43 [2024-10-31 22:12:06,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=343, Invalid=2097, Unknown=10, NotChecked=0, Total=2450 [2024-10-31 22:12:06,309 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:12:06,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 100 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 8 Unknown, 0 Unchecked, 9.5s Time] [2024-10-31 22:12:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-31 22:12:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2024-10-31 22:12:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2024-10-31 22:12:06,322 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 19 [2024-10-31 22:12:06,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:12:06,322 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2024-10-31 22:12:06,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:12:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2024-10-31 22:12:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-31 22:12:06,324 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:12:06,324 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:06,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:12:06,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:12:06,525 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-31 22:12:06,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 898656624, now seen corresponding path program 3 times [2024-10-31 22:12:06,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:06,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873056956] [2024-10-31 22:12:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:07,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:07,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873056956] [2024-10-31 22:12:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873056956] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:12:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535471241] [2024-10-31 22:12:07,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:12:07,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:07,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:12:07,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688b420e-db5e-4d30-a0e9-b84bf3a8fc3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:12:08,043 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-31 22:12:08,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:12:08,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-31 22:12:08,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:08,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10