./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:59:20,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:59:20,822 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:59:20,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:59:20,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:59:20,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:59:20,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:59:20,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:59:20,874 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:59:20,879 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:59:20,880 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:59:20,881 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:59:20,882 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:59:20,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:59:20,884 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:59:20,885 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:59:20,885 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:59:20,885 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:59:20,886 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:59:20,886 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:59:20,887 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:59:20,887 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:59:20,888 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:59:20,888 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:59:20,889 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:59:20,889 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:59:20,889 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:59:20,890 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:59:20,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:59:20,891 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:59:20,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:59:20,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:59:20,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:20,894 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:59:20,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:59:20,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:59:20,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:59:20,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:59:20,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:59:20,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:59:20,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:59:20,896 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_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 [2023-11-24 21:59:21,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:59:21,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:59:21,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:59:21,258 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:59:21,258 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:59:21,260 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2023-11-24 21:59:24,452 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:59:24,855 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:59:24,856 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2023-11-24 21:59:24,876 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/data/5ebb202bd/276536fbc69f4c65893af13a64dca049/FLAG8664cfe23 [2023-11-24 21:59:25,067 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/data/5ebb202bd/276536fbc69f4c65893af13a64dca049 [2023-11-24 21:59:25,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:59:25,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:59:25,078 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:25,078 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:59:25,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:59:25,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242e2ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25, skipping insertion in model container [2023-11-24 21:59:25,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,147 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:59:25,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:25,538 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:59:25,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:25,614 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:59:25,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25 WrapperNode [2023-11-24 21:59:25,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:25,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:25,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:59:25,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:59:25,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,643 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,675 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-11-24 21:59:25,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:25,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:59:25,677 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:59:25,677 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:59:25,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,695 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,716 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [3, 1]. 75 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [2, 1]. [2023-11-24 21:59:25,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,733 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,736 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:59:25,737 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:59:25,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:59:25,738 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:59:25,738 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (1/1) ... [2023-11-24 21:59:25,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:25,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:25,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:59:25,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:59:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:59:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:59:25,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:59:25,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:59:25,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:59:25,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:59:25,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:59:25,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:59:26,015 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:59:26,017 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:59:26,330 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:59:26,391 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:59:26,393 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:59:26,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:26 BoogieIcfgContainer [2023-11-24 21:59:26,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:59:26,398 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:59:26,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:59:26,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:59:26,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:59:25" (1/3) ... [2023-11-24 21:59:26,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7a1f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:26, skipping insertion in model container [2023-11-24 21:59:26,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:25" (2/3) ... [2023-11-24 21:59:26,406 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7a1f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:26, skipping insertion in model container [2023-11-24 21:59:26,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:26" (3/3) ... [2023-11-24 21:59:26,408 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcpy-alloca-1.i [2023-11-24 21:59:26,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:59:26,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-11-24 21:59:26,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:59:26,505 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@539b7b9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:59:26,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-24 21:59:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 2.142857142857143) internal successors, (30), 23 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) [2023-11-24 21:59:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:59:26,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:26,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:59:26,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:26,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:26,533 INFO L85 PathProgramCache]: Analyzing trace with hash 92512218, now seen corresponding path program 1 times [2023-11-24 21:59:26,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:26,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980814316] [2023-11-24 21:59:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:26,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:26,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:26,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980814316] [2023-11-24 21:59:26,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980814316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:26,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:26,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:26,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802472814] [2023-11-24 21:59:26,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:26,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:26,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:26,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:26,868 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 2.142857142857143) internal successors, (30), 23 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 4 states, 4 states have (on average 1.25) 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) [2023-11-24 21:59:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:26,982 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-24 21:59:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) 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 [2023-11-24 21:59:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:26,995 INFO L225 Difference]: With dead ends: 27 [2023-11-24 21:59:26,995 INFO L226 Difference]: Without dead ends: 26 [2023-11-24 21:59:26,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:27,002 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:27,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-24 21:59:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-24 21:59:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 23 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) [2023-11-24 21:59:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-24 21:59:27,044 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 5 [2023-11-24 21:59:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:27,045 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-24 21:59:27,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) 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) [2023-11-24 21:59:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-24 21:59:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:59:27,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:27,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:59:27,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:59:27,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:27,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash 92514140, now seen corresponding path program 1 times [2023-11-24 21:59:27,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:27,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646477572] [2023-11-24 21:59:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:27,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:27,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646477572] [2023-11-24 21:59:27,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646477572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:27,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:27,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:59:27,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086312833] [2023-11-24 21:59:27,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:27,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:27,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:27,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:27,096 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2023-11-24 21:59:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:27,130 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-11-24 21:59:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2023-11-24 21:59:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:27,132 INFO L225 Difference]: With dead ends: 25 [2023-11-24 21:59:27,132 INFO L226 Difference]: Without dead ends: 24 [2023-11-24 21:59:27,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:27,134 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 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 [2023-11-24 21:59:27,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-24 21:59:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-11-24 21:59:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 22 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) [2023-11-24 21:59:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-24 21:59:27,142 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2023-11-24 21:59:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:27,142 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-24 21:59:27,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2023-11-24 21:59:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-24 21:59:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:59:27,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:27,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:59:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:59:27,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:27,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1427087765, now seen corresponding path program 1 times [2023-11-24 21:59:27,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:27,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583475756] [2023-11-24 21:59:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:27,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:27,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:27,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583475756] [2023-11-24 21:59:27,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583475756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:27,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:27,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:27,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206735746] [2023-11-24 21:59:27,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:27,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:27,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:27,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:27,303 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:27,342 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2023-11-24 21:59:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:27,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:59:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:27,344 INFO L225 Difference]: With dead ends: 40 [2023-11-24 21:59:27,344 INFO L226 Difference]: Without dead ends: 40 [2023-11-24 21:59:27,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:27,346 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:27,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-24 21:59:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2023-11-24 21:59:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 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) [2023-11-24 21:59:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-24 21:59:27,353 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 6 [2023-11-24 21:59:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:27,354 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-24 21:59:27,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-24 21:59:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:59:27,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:27,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:59:27,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:59:27,356 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:27,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1427028183, now seen corresponding path program 1 times [2023-11-24 21:59:27,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:27,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948519501] [2023-11-24 21:59:27,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:27,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:27,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:27,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948519501] [2023-11-24 21:59:27,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948519501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:27,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:27,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365053904] [2023-11-24 21:59:27,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:27,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:27,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:27,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:27,443 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:27,468 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-11-24 21:59:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:59:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:27,470 INFO L225 Difference]: With dead ends: 23 [2023-11-24 21:59:27,470 INFO L226 Difference]: Without dead ends: 23 [2023-11-24 21:59:27,471 INFO L412 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 [2023-11-24 21:59:27,472 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:27,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-24 21:59:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-24 21:59:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) internal successors, (26), 22 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) [2023-11-24 21:59:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-24 21:59:27,478 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2023-11-24 21:59:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:27,478 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-24 21:59:27,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-24 21:59:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:59:27,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:27,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:59:27,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:59:27,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:27,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1427028182, now seen corresponding path program 1 times [2023-11-24 21:59:27,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:27,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152334601] [2023-11-24 21:59:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:27,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:27,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152334601] [2023-11-24 21:59:27,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152334601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:27,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:27,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:27,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859454250] [2023-11-24 21:59:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:27,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:27,598 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:27,682 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2023-11-24 21:59:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:27,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:59:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:27,685 INFO L225 Difference]: With dead ends: 42 [2023-11-24 21:59:27,685 INFO L226 Difference]: Without dead ends: 42 [2023-11-24 21:59:27,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:27,687 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:27,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-24 21:59:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2023-11-24 21:59:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 23 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) [2023-11-24 21:59:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-24 21:59:27,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2023-11-24 21:59:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:27,693 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-24 21:59:27,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-24 21:59:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:59:27,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:27,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:59:27,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:59:27,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:27,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1425181140, now seen corresponding path program 1 times [2023-11-24 21:59:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591550202] [2023-11-24 21:59:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:28,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:28,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591550202] [2023-11-24 21:59:28,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591550202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:28,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:28,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:28,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526075471] [2023-11-24 21:59:28,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:28,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:28,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:28,036 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:28,125 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-24 21:59:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:28,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:59:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:28,126 INFO L225 Difference]: With dead ends: 27 [2023-11-24 21:59:28,126 INFO L226 Difference]: Without dead ends: 27 [2023-11-24 21:59:28,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:59:28,128 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:28,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-24 21:59:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-24 21:59:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.631578947368421) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-24 21:59:28,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2023-11-24 21:59:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:28,134 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-24 21:59:28,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-24 21:59:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:59:28,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:28,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:28,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:59:28,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:28,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1290049389, now seen corresponding path program 1 times [2023-11-24 21:59:28,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:28,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532174823] [2023-11-24 21:59:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:28,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:28,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532174823] [2023-11-24 21:59:28,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532174823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:28,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:28,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:28,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448960141] [2023-11-24 21:59:28,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:28,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:28,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:28,288 INFO L87 Difference]: Start difference. First operand 26 states and 31 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) [2023-11-24 21:59:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:28,326 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-11-24 21:59:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:28,327 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 [2023-11-24 21:59:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:28,327 INFO L225 Difference]: With dead ends: 41 [2023-11-24 21:59:28,328 INFO L226 Difference]: Without dead ends: 41 [2023-11-24 21:59:28,328 INFO L412 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 [2023-11-24 21:59:28,329 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:28,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-24 21:59:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2023-11-24 21:59:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-24 21:59:28,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 7 [2023-11-24 21:59:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:28,336 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-24 21:59:28,336 INFO L496 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) [2023-11-24 21:59:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-24 21:59:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:59:28,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:28,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:28,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:59:28,338 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:28,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1288202347, now seen corresponding path program 1 times [2023-11-24 21:59:28,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:28,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374934805] [2023-11-24 21:59:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:28,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:28,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:28,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374934805] [2023-11-24 21:59:28,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374934805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:28,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:28,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:28,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138288674] [2023-11-24 21:59:28,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:28,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:28,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:28,487 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2023-11-24 21:59:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:28,520 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-24 21:59:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2023-11-24 21:59:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:28,521 INFO L225 Difference]: With dead ends: 29 [2023-11-24 21:59:28,521 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:59:28,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:28,523 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:28,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:59:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2023-11-24 21:59:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-24 21:59:28,527 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2023-11-24 21:59:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:28,528 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-24 21:59:28,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2023-11-24 21:59:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-24 21:59:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:59:28,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:28,529 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:59:28,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:28,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 495533113, now seen corresponding path program 1 times [2023-11-24 21:59:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:28,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346963244] [2023-11-24 21:59:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:28,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346963244] [2023-11-24 21:59:28,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346963244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383079800] [2023-11-24 21:59:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:28,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:28,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:28,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:28,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:59:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:28,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:59:28,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:29,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:59:29,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:59:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:29,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:29,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383079800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:29,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:29,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-24 21:59:29,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114958311] [2023-11-24 21:59:29,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:29,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:59:29,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:29,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:59:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:59:29,481 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:29,789 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-11-24 21:59:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:59:29,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:59:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:29,791 INFO L225 Difference]: With dead ends: 27 [2023-11-24 21:59:29,791 INFO L226 Difference]: Without dead ends: 27 [2023-11-24 21:59:29,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:59:29,792 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:29,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 49 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-24 21:59:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2023-11-24 21:59:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 21 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) [2023-11-24 21:59:29,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-24 21:59:29,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 8 [2023-11-24 21:59:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:29,796 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-24 21:59:29,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-24 21:59:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:59:29,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:29,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:29,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:29,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:29,998 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:29,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1508116980, now seen corresponding path program 1 times [2023-11-24 21:59:29,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:29,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250354067] [2023-11-24 21:59:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:29,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:30,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250354067] [2023-11-24 21:59:30,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250354067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:30,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:30,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:30,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861196435] [2023-11-24 21:59:30,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:30,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:30,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:30,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:30,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:30,077 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:30,109 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2023-11-24 21:59:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-24 21:59:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:30,110 INFO L225 Difference]: With dead ends: 21 [2023-11-24 21:59:30,110 INFO L226 Difference]: Without dead ends: 21 [2023-11-24 21:59:30,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:30,112 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:30,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-24 21:59:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-24 21:59:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 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) [2023-11-24 21:59:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-24 21:59:30,115 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2023-11-24 21:59:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:30,115 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-24 21:59:30,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-24 21:59:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:59:30,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:30,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:30,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:59:30,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:30,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1508116981, now seen corresponding path program 1 times [2023-11-24 21:59:30,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:30,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788741684] [2023-11-24 21:59:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:30,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:30,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:30,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788741684] [2023-11-24 21:59:30,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788741684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:30,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:30,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:59:30,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532595676] [2023-11-24 21:59:30,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:30,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:59:30,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:30,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:59:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:59:30,248 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:30,316 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-24 21:59:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:59:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-24 21:59:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:30,317 INFO L225 Difference]: With dead ends: 27 [2023-11-24 21:59:30,317 INFO L226 Difference]: Without dead ends: 27 [2023-11-24 21:59:30,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:59:30,319 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:30,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-24 21:59:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-24 21:59:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-24 21:59:30,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 9 [2023-11-24 21:59:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:30,323 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-24 21:59:30,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-24 21:59:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:59:30,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:30,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:30,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:59:30,324 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:30,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash -493013856, now seen corresponding path program 1 times [2023-11-24 21:59:30,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:30,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440423799] [2023-11-24 21:59:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:30,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:30,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:30,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440423799] [2023-11-24 21:59:30,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440423799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:30,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:30,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927873220] [2023-11-24 21:59:30,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:30,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:30,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:30,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:30,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:30,441 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:30,488 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-11-24 21:59:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 21:59:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:30,489 INFO L225 Difference]: With dead ends: 22 [2023-11-24 21:59:30,489 INFO L226 Difference]: Without dead ends: 22 [2023-11-24 21:59:30,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:30,491 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:30,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-24 21:59:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-24 21:59:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 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) [2023-11-24 21:59:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-24 21:59:30,494 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2023-11-24 21:59:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:30,494 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-24 21:59:30,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-24 21:59:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:59:30,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:30,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:30,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:59:30,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:30,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash -493013855, now seen corresponding path program 1 times [2023-11-24 21:59:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:30,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592972292] [2023-11-24 21:59:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:30,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:30,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592972292] [2023-11-24 21:59:30,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592972292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:30,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:30,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:59:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327707856] [2023-11-24 21:59:30,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:30,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:59:30,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:59:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:59:30,691 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:30,806 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-11-24 21:59:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:59:30,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 21:59:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:30,807 INFO L225 Difference]: With dead ends: 39 [2023-11-24 21:59:30,807 INFO L226 Difference]: Without dead ends: 39 [2023-11-24 21:59:30,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:59:30,809 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:30,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 53 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-24 21:59:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2023-11-24 21:59:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) 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) [2023-11-24 21:59:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-24 21:59:30,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 10 [2023-11-24 21:59:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:30,816 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-24 21:59:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-24 21:59:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:59:30,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:30,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:30,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:59:30,817 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash 187044515, now seen corresponding path program 1 times [2023-11-24 21:59:30,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611849227] [2023-11-24 21:59:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:31,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:31,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611849227] [2023-11-24 21:59:31,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611849227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:31,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:31,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:59:31,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588244944] [2023-11-24 21:59:31,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:31,060 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:31,161 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-11-24 21:59:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:59:31,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 21:59:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:31,162 INFO L225 Difference]: With dead ends: 31 [2023-11-24 21:59:31,162 INFO L226 Difference]: Without dead ends: 31 [2023-11-24 21:59:31,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:59:31,164 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:31,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 24 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-24 21:59:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-11-24 21:59:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-24 21:59:31,169 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2023-11-24 21:59:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:31,169 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-24 21:59:31,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-24 21:59:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:59:31,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:31,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:31,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:59:31,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:31,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1412393616, now seen corresponding path program 1 times [2023-11-24 21:59:31,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:31,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779401130] [2023-11-24 21:59:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:31,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779401130] [2023-11-24 21:59:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779401130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:31,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:31,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:31,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836044807] [2023-11-24 21:59:31,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:31,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:31,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:31,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:31,369 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2023-11-24 21:59:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:31,387 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-11-24 21:59:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2023-11-24 21:59:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:31,389 INFO L225 Difference]: With dead ends: 22 [2023-11-24 21:59:31,389 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 21:59:31,391 INFO L412 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 [2023-11-24 21:59:31,391 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:31,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 21:59:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-24 21:59:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-24 21:59:31,395 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2023-11-24 21:59:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:31,396 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-24 21:59:31,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2023-11-24 21:59:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-24 21:59:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:59:31,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:31,398 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:31,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:59:31,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:31,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:31,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1412394685, now seen corresponding path program 1 times [2023-11-24 21:59:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:31,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521507807] [2023-11-24 21:59:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:31,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:31,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521507807] [2023-11-24 21:59:31,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521507807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:31,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:31,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:59:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386890045] [2023-11-24 21:59:31,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:31,643 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2023-11-24 21:59:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:31,721 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-24 21:59:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:59:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 [2023-11-24 21:59:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:31,722 INFO L225 Difference]: With dead ends: 28 [2023-11-24 21:59:31,722 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 21:59:31,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:59:31,723 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:31,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 21:59:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-24 21:59:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) 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) [2023-11-24 21:59:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-24 21:59:31,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2023-11-24 21:59:31,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:31,726 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-24 21:59:31,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2023-11-24 21:59:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-24 21:59:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:59:31,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:31,728 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:31,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:59:31,728 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:31,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2113459263, now seen corresponding path program 1 times [2023-11-24 21:59:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339603131] [2023-11-24 21:59:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:31,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:31,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:31,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339603131] [2023-11-24 21:59:31,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339603131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:31,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:31,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:59:31,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944780198] [2023-11-24 21:59:31,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:31,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:31,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:31,912 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2023-11-24 21:59:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:32,001 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2023-11-24 21:59:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:59:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 [2023-11-24 21:59:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:32,003 INFO L225 Difference]: With dead ends: 26 [2023-11-24 21:59:32,003 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 21:59:32,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:59:32,004 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:32,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 49 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 21:59:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-24 21:59:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-24 21:59:32,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2023-11-24 21:59:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:32,008 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-24 21:59:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2023-11-24 21:59:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-24 21:59:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:59:32,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:32,009 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:59:32,009 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:32,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1923342595, now seen corresponding path program 1 times [2023-11-24 21:59:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535420296] [2023-11-24 21:59:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:32,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:32,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:32,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535420296] [2023-11-24 21:59:32,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535420296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:32,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:32,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:59:32,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317440749] [2023-11-24 21:59:32,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:32,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:32,229 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2023-11-24 21:59:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:32,345 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-11-24 21:59:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:59:32,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 [2023-11-24 21:59:32,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:32,346 INFO L225 Difference]: With dead ends: 25 [2023-11-24 21:59:32,346 INFO L226 Difference]: Without dead ends: 19 [2023-11-24 21:59:32,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:59:32,348 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:32,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-24 21:59:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-11-24 21:59:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-24 21:59:32,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-11-24 21:59:32,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:32,351 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-24 21:59:32,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2023-11-24 21:59:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-24 21:59:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:59:32,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:32,354 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:59:32,354 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:32,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash -643506096, now seen corresponding path program 1 times [2023-11-24 21:59:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750967387] [2023-11-24 21:59:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:32,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:32,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:32,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750967387] [2023-11-24 21:59:32,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750967387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:32,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081126332] [2023-11-24 21:59:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:32,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:32,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:32,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:32,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:59:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:32,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-24 21:59:32,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:32,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:33,029 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 [2023-11-24 21:59:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:33,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081126332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:33,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:33,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-11-24 21:59:33,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378594821] [2023-11-24 21:59:33,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:59:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:59:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:59:33,078 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 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) [2023-11-24 21:59:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:33,346 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-11-24 21:59:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:59:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 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) Word has length 15 [2023-11-24 21:59:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:33,347 INFO L225 Difference]: With dead ends: 25 [2023-11-24 21:59:33,347 INFO L226 Difference]: Without dead ends: 25 [2023-11-24 21:59:33,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:59:33,348 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:33,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 38 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-24 21:59:33,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-11-24 21:59:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 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) [2023-11-24 21:59:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-24 21:59:33,351 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2023-11-24 21:59:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:33,351 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-24 21:59:33,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 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) [2023-11-24 21:59:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-24 21:59:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:59:33,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:33,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:33,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:33,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:33,559 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:33,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1526147494, now seen corresponding path program 1 times [2023-11-24 21:59:33,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:33,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407603407] [2023-11-24 21:59:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:33,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:33,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:33,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407603407] [2023-11-24 21:59:33,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407603407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:33,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611203327] [2023-11-24 21:59:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:33,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:33,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:33,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:33,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:59:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:34,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-24 21:59:34,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:34,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:59:34,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:59:34,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:59:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:34,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:34,626 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:59:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:34,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611203327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:34,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:34,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-11-24 21:59:34,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698570036] [2023-11-24 21:59:34,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:34,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 21:59:34,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 21:59:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:59:34,674 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2023-11-24 21:59:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:35,029 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-24 21:59:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:59:35,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 16 [2023-11-24 21:59:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:35,030 INFO L225 Difference]: With dead ends: 24 [2023-11-24 21:59:35,031 INFO L226 Difference]: Without dead ends: 24 [2023-11-24 21:59:35,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 21:59:35,032 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 79 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:35,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 33 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-24 21:59:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-24 21:59:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-11-24 21:59:35,041 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2023-11-24 21:59:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:35,041 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-11-24 21:59:35,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2023-11-24 21:59:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-11-24 21:59:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:59:35,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:35,043 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:35,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:35,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:35,249 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:35,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1063805032, now seen corresponding path program 2 times [2023-11-24 21:59:35,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:35,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471388906] [2023-11-24 21:59:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:35,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:35,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:35,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471388906] [2023-11-24 21:59:35,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471388906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:35,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918499408] [2023-11-24 21:59:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:59:35,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:35,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:35,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:59:35,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:59:35,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:35,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-24 21:59:35,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:35,784 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 [2023-11-24 21:59:36,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:59:36,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-11-24 21:59:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:36,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:36,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-24 21:59:36,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-24 21:59:36,712 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 [2023-11-24 21:59:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918499408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:36,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:36,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2023-11-24 21:59:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558345681] [2023-11-24 21:59:36,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:36,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-24 21:59:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-24 21:59:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:59:36,742 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:43,582 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2023-11-24 21:59:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:59:43,583 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-24 21:59:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:43,583 INFO L225 Difference]: With dead ends: 41 [2023-11-24 21:59:43,583 INFO L226 Difference]: Without dead ends: 31 [2023-11-24 21:59:43,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=271, Invalid=1798, Unknown=1, NotChecked=0, Total=2070 [2023-11-24 21:59:43,585 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:43,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 75 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:59:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-24 21:59:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2023-11-24 21:59:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 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) [2023-11-24 21:59:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-11-24 21:59:43,587 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2023-11-24 21:59:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:43,588 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-11-24 21:59:43,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-11-24 21:59:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:59:43,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:43,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:43,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:43,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-24 21:59:43,791 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:43,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1779827029, now seen corresponding path program 2 times [2023-11-24 21:59:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:43,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660472686] [2023-11-24 21:59:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:44,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:44,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660472686] [2023-11-24 21:59:44,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660472686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:44,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339254819] [2023-11-24 21:59:44,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:59:44,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:44,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:44,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:44,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:59:44,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:59:44,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:44,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-24 21:59:44,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:44,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:59:44,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:59:44,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:59:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:45,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:45,548 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:59:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:45,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339254819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:45,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:45,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-11-24 21:59:45,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471888345] [2023-11-24 21:59:45,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:45,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-24 21:59:45,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:45,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-24 21:59:45,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:59:45,621 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:46,361 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-11-24 21:59:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:59:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 21:59:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:46,364 INFO L225 Difference]: With dead ends: 29 [2023-11-24 21:59:46,365 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:59:46,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 21:59:46,366 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 122 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:46,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 48 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:59:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:59:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-24 21:59:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-24 21:59:46,369 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2023-11-24 21:59:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:46,370 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-24 21:59:46,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-24 21:59:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:59:46,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:46,371 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:46,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:46,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-24 21:59:46,572 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:46,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1455755149, now seen corresponding path program 3 times [2023-11-24 21:59:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:46,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074435760] [2023-11-24 21:59:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:47,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:47,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074435760] [2023-11-24 21:59:47,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074435760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:47,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430841561] [2023-11-24 21:59:47,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:59:47,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:47,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:47,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:47,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:59:47,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:59:47,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:47,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-24 21:59:47,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:47,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:59:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:47,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:47,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-24 21:59:47,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-24 21:59:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430841561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:47,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 21 [2023-11-24 21:59:47,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703781022] [2023-11-24 21:59:47,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:47,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:59:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:59:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:59:47,811 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2023-11-24 21:59:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:48,139 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-11-24 21:59:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:59:48,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) Word has length 25 [2023-11-24 21:59:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:48,141 INFO L225 Difference]: With dead ends: 45 [2023-11-24 21:59:48,141 INFO L226 Difference]: Without dead ends: 31 [2023-11-24 21:59:48,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:59:48,142 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:48,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 96 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:59:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-24 21:59:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-11-24 21:59:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 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) [2023-11-24 21:59:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-11-24 21:59:48,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2023-11-24 21:59:48,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:48,146 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-11-24 21:59:48,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 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) [2023-11-24 21:59:48,146 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-11-24 21:59:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:59:48,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:48,147 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:48,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:48,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-24 21:59:48,354 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:48,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash -437957306, now seen corresponding path program 4 times [2023-11-24 21:59:48,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:48,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503144221] [2023-11-24 21:59:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:48,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:48,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:48,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503144221] [2023-11-24 21:59:48,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503144221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:48,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600475124] [2023-11-24 21:59:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:59:48,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:48,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:48,809 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:48,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:59:48,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:59:48,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:48,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-24 21:59:48,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:48,966 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 [2023-11-24 21:59:49,965 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-11-24 21:59:49,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2023-11-24 21:59:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:59:50,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:50,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2023-11-24 21:59:51,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 54 [2023-11-24 21:59:51,033 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 [2023-11-24 21:59:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:59:51,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600475124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:51,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:51,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2023-11-24 21:59:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953235778] [2023-11-24 21:59:51,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:51,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-24 21:59:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-24 21:59:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 21:59:51,066 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 33 states, 32 states have (on average 1.90625) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:52,698 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-11-24 21:59:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 21:59:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-24 21:59:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:52,700 INFO L225 Difference]: With dead ends: 30 [2023-11-24 21:59:52,700 INFO L226 Difference]: Without dead ends: 30 [2023-11-24 21:59:52,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2023-11-24 21:59:52,702 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:52,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 41 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:59:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-24 21:59:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-11-24 21:59:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2023-11-24 21:59:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-24 21:59:52,704 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2023-11-24 21:59:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:52,704 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-24 21:59:52,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-24 21:59:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 21:59:52,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:52,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:52,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:52,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-24 21:59:52,906 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:52,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash -691774608, now seen corresponding path program 3 times [2023-11-24 21:59:52,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:52,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833002680] [2023-11-24 21:59:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:52,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:53,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:53,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833002680] [2023-11-24 21:59:53,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833002680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:53,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863472165] [2023-11-24 21:59:53,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:59:53,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:53,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:53,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:53,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:59:53,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:59:53,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:53,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-24 21:59:53,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:53,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:59:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:59:53,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:59:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:54,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:55,264 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:59:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:55,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863472165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:55,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:55,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-11-24 21:59:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094205609] [2023-11-24 21:59:55,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:55,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-24 21:59:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-24 21:59:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2023-11-24 21:59:55,330 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:56,415 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2023-11-24 21:59:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:59:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-24 21:59:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:56,416 INFO L225 Difference]: With dead ends: 34 [2023-11-24 21:59:56,416 INFO L226 Difference]: Without dead ends: 34 [2023-11-24 21:59:56,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=342, Invalid=2208, Unknown=0, NotChecked=0, Total=2550 [2023-11-24 21:59:56,418 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 119 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:56,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 75 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:59:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-24 21:59:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-11-24 21:59:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-24 21:59:56,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2023-11-24 21:59:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:56,421 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-24 21:59:56,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-24 21:59:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:59:56,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:56,423 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:56,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:56,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-24 21:59:56,630 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:59:56,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash -582512600, now seen corresponding path program 4 times [2023-11-24 21:59:56,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:56,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832299265] [2023-11-24 21:59:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:56,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:57,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832299265] [2023-11-24 21:59:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832299265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696496782] [2023-11-24 21:59:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:59:57,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:57,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:57,402 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:57,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:59:57,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:59:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:59:57,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-24 21:59:57,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:57,746 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 [2023-11-24 22:00:00,954 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2023-11-24 22:00:00,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2023-11-24 22:00:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 18 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:00,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:01,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2023-11-24 22:00:01,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 22:00:01,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 45 [2023-11-24 22:00:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:02,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696496782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:02,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:02,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 48 [2023-11-24 22:00:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629238158] [2023-11-24 22:00:02,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:02,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-24 22:00:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:02,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-24 22:00:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2038, Unknown=4, NotChecked=0, Total=2256 [2023-11-24 22:00:02,121 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 48 states, 48 states have (on average 1.75) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:05,857 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2023-11-24 22:00:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 22:00:05,858 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.75) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-24 22:00:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:05,858 INFO L225 Difference]: With dead ends: 54 [2023-11-24 22:00:05,858 INFO L226 Difference]: Without dead ends: 36 [2023-11-24 22:00:05,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=568, Invalid=3848, Unknown=6, NotChecked=0, Total=4422 [2023-11-24 22:00:05,861 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 71 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:05,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 94 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 22:00:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-24 22:00:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-11-24 22:00:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2023-11-24 22:00:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-11-24 22:00:05,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2023-11-24 22:00:05,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:05,864 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-11-24 22:00:05,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.75) internal successors, (84), 48 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-11-24 22:00:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 22:00:05,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:05,865 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:05,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:06,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:06,072 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:00:06,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2014687221, now seen corresponding path program 5 times [2023-11-24 22:00:06,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:06,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970341608] [2023-11-24 22:00:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:06,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:07,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:07,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970341608] [2023-11-24 22:00:07,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970341608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:07,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971548351] [2023-11-24 22:00:07,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 22:00:07,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:07,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:07,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:07,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:00:07,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-24 22:00:07,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:00:07,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-24 22:00:07,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:07,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 22:00:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:07,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 22:00:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:07,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:08,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 22:00:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:08,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971548351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:08,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:08,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 39 [2023-11-24 22:00:08,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355157005] [2023-11-24 22:00:08,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-24 22:00:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:08,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-24 22:00:08,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 22:00:08,596 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 41 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:09,550 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-11-24 22:00:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 22:00:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-24 22:00:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:09,551 INFO L225 Difference]: With dead ends: 40 [2023-11-24 22:00:09,551 INFO L226 Difference]: Without dead ends: 40 [2023-11-24 22:00:09,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=443, Invalid=2863, Unknown=0, NotChecked=0, Total=3306 [2023-11-24 22:00:09,553 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 126 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:09,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 115 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 22:00:09,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-24 22:00:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2023-11-24 22:00:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2023-11-24 22:00:09,556 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2023-11-24 22:00:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:09,557 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2023-11-24 22:00:09,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2023-11-24 22:00:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-24 22:00:09,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:09,558 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:09,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:09,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:09,765 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 22:00:09,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:09,766 INFO L85 PathProgramCache]: Analyzing trace with hash 354490925, now seen corresponding path program 6 times [2023-11-24 22:00:09,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:09,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047392525] [2023-11-24 22:00:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:09,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:10,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:10,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047392525] [2023-11-24 22:00:10,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047392525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:10,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846884407] [2023-11-24 22:00:10,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 22:00:10,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:10,624 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:10,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f3690f-078a-4fb2-ae24-55f93669cf0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 22:00:11,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-24 22:00:11,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 22:00:11,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-24 22:00:11,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:11,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 22:00:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:11,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:11,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-24 22:00:11,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-24 22:00:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:11,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846884407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:11,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:11,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 33 [2023-11-24 22:00:11,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570027622] [2023-11-24 22:00:11,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:11,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-24 22:00:11,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:11,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-24 22:00:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 22:00:11,704 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)