./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/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_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/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 64bit --witnessprinter.graph.data.programhash ddb0eb207fb72f46b2f9a0f11e334a77be9b4b455314fd1b26a90347e4178746 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:44:00,408 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:44:00,523 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-24 21:44:00,527 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:44:00,528 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:44:00,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:44:00,569 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:44:00,570 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:44:00,572 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:44:00,577 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:44:00,577 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:44:00,578 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:44:00,579 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:44:00,581 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:44:00,581 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:44:00,582 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:44:00,582 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:44:00,583 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:44:00,583 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:44:00,583 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:44:00,584 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:44:00,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:44:00,585 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:44:00,585 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:44:00,586 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:44:00,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:44:00,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:44:00,588 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:44:00,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:44:00,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:00,590 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:44:00,590 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:44:00,590 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:44:00,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:44:00,591 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:44:00,591 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:44:00,592 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:44:00,592 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:44:00,592 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_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ddb0eb207fb72f46b2f9a0f11e334a77be9b4b455314fd1b26a90347e4178746 [2023-11-24 21:44:00,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:44:00,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:44:00,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:44:00,921 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:44:00,922 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:44:00,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i [2023-11-24 21:44:04,041 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:44:04,301 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:44:04,302 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/sv-benchmarks/c/termination-memory-alloca/openbsd_cstpncpy-alloca-2.i [2023-11-24 21:44:04,322 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/data/9ce94c71e/789f1dd44aab41eb8af6255f19e2a616/FLAG3f3a06b34 [2023-11-24 21:44:04,340 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/data/9ce94c71e/789f1dd44aab41eb8af6255f19e2a616 [2023-11-24 21:44:04,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:44:04,344 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:44:04,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:04,345 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:44:04,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:44:04,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1381d019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04, skipping insertion in model container [2023-11-24 21:44:04,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,401 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:44:04,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:04,712 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:44:04,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:44:04,789 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:44:04,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04 WrapperNode [2023-11-24 21:44:04,790 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:44:04,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:04,791 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:44:04,791 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:44:04,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,859 INFO L138 Inliner]: procedures = 113, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-11-24 21:44:04,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:44:04,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:44:04,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:44:04,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:44:04,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,880 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,900 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 6, 2]. 60 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 6 writes are split as follows [1, 3, 2]. [2023-11-24 21:44:04,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,902 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,914 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:44:04,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:44:04,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:44:04,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:44:04,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (1/1) ... [2023-11-24 21:44:04,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:44:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:04,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:44:04,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:44:05,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:44:05,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:44:05,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:44:05,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:44:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:44:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:44:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:44:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:44:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:44:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:44:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:44:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:44:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:44:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:44:05,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:44:05,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:44:05,157 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:44:05,171 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:44:05,495 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:44:05,571 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:44:05,578 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:44:05,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:05 BoogieIcfgContainer [2023-11-24 21:44:05,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:44:05,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:44:05,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:44:05,588 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:44:05,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:44:04" (1/3) ... [2023-11-24 21:44:05,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386a8e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:05, skipping insertion in model container [2023-11-24 21:44:05,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:44:04" (2/3) ... [2023-11-24 21:44:05,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386a8e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:44:05, skipping insertion in model container [2023-11-24 21:44:05,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:44:05" (3/3) ... [2023-11-24 21:44:05,593 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpncpy-alloca-2.i [2023-11-24 21:44:05,625 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:44:05,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-11-24 21:44:05,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:44:05,695 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;@cf4e743, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:44:05,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-24 21:44:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 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 21:44:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:44:05,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:05,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:44:05,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:05,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:05,712 INFO L85 PathProgramCache]: Analyzing trace with hash 119294217, now seen corresponding path program 1 times [2023-11-24 21:44:05,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:05,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891461518] [2023-11-24 21:44:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:05,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:05,997 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 21:44:05,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:05,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891461518] [2023-11-24 21:44:05,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891461518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:05,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:05,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:44:06,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552322935] [2023-11-24 21:44:06,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:06,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:06,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:06,063 INFO L87 Difference]: Start difference. First operand has 44 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:06,144 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-11-24 21:44:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:06,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 21:44:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:06,156 INFO L225 Difference]: With dead ends: 43 [2023-11-24 21:44:06,156 INFO L226 Difference]: Without dead ends: 42 [2023-11-24 21:44:06,158 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 21:44:06,163 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:06,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-24 21:44:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-24 21:44:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 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 21:44:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-24 21:44:06,203 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 5 [2023-11-24 21:44:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:06,204 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-24 21:44:06,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-24 21:44:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:44:06,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:06,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:44:06,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:44:06,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:06,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash 119294218, now seen corresponding path program 1 times [2023-11-24 21:44:06,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:06,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557904991] [2023-11-24 21:44:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:06,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:06,528 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 21:44:06,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557904991] [2023-11-24 21:44:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557904991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:06,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:06,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943861797] [2023-11-24 21:44:06,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:06,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:44:06,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:44:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:44:06,533 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:06,611 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2023-11-24 21:44:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:44:06,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 21:44:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:06,614 INFO L225 Difference]: With dead ends: 81 [2023-11-24 21:44:06,614 INFO L226 Difference]: Without dead ends: 81 [2023-11-24 21:44:06,615 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 21:44:06,616 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:06,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 62 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-24 21:44:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 45. [2023-11-24 21:44:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 2.04) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 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 21:44:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-24 21:44:06,625 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 5 [2023-11-24 21:44:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:06,626 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-24 21:44:06,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-24 21:44:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:44:06,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:06,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:44:06,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:44:06,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:06,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:06,628 INFO L85 PathProgramCache]: Analyzing trace with hash 119353800, now seen corresponding path program 1 times [2023-11-24 21:44:06,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:06,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776521400] [2023-11-24 21:44:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:06,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:06,834 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 21:44:06,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:06,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776521400] [2023-11-24 21:44:06,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776521400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:06,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:06,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:06,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779328131] [2023-11-24 21:44:06,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:06,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:44:06,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:44:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:44:06,838 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 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 21:44:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:06,895 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-24 21:44:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:06,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 21:44:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:06,897 INFO L225 Difference]: With dead ends: 44 [2023-11-24 21:44:06,897 INFO L226 Difference]: Without dead ends: 44 [2023-11-24 21:44:06,897 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 21:44:06,899 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:06,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 24 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:44:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-24 21:44:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2023-11-24 21:44:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 2.090909090909091) internal successors, (46), 40 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 21:44:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-24 21:44:06,905 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 5 [2023-11-24 21:44:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:06,905 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-24 21:44:06,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 21:44:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-24 21:44:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:44:06,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:06,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:44:06,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:44:06,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:06,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -596844068, now seen corresponding path program 1 times [2023-11-24 21:44:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:06,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687340391] [2023-11-24 21:44:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:06,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:06,960 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 21:44:06,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:06,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687340391] [2023-11-24 21:44:06,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687340391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:06,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:06,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:44:06,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352021455] [2023-11-24 21:44:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:06,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:06,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:06,964 INFO L87 Difference]: Start difference. First operand 41 states and 46 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 21:44:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:07,010 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-11-24 21:44:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:07,010 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 21:44:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:07,011 INFO L225 Difference]: With dead ends: 35 [2023-11-24 21:44:07,012 INFO L226 Difference]: Without dead ends: 35 [2023-11-24 21:44:07,012 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 21:44:07,013 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:07,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:44:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-24 21:44:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-24 21:44:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 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 21:44:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-24 21:44:07,019 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 6 [2023-11-24 21:44:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:07,020 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-24 21:44:07,020 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 21:44:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-24 21:44:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:44:07,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:07,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:44:07,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:44:07,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:07,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash -596844067, now seen corresponding path program 1 times [2023-11-24 21:44:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:07,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446974529] [2023-11-24 21:44:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:07,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:07,101 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 21:44:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446974529] [2023-11-24 21:44:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446974529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:07,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:07,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:44:07,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465148710] [2023-11-24 21:44:07,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:07,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:44:07,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:44:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:44:07,119 INFO L87 Difference]: Start difference. First operand 35 states and 40 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 21:44:07,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:07,160 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-24 21:44:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:44:07,161 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 21:44:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:07,162 INFO L225 Difference]: With dead ends: 29 [2023-11-24 21:44:07,162 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:44:07,163 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 21:44:07,164 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:07,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:44:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:44:07,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-24 21:44:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 28 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 21:44:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-24 21:44:07,168 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 6 [2023-11-24 21:44:07,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:07,169 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-24 21:44:07,169 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 21:44:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-24 21:44:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:44:07,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:07,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:07,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:44:07,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:07,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:07,172 INFO L85 PathProgramCache]: Analyzing trace with hash 585592890, now seen corresponding path program 1 times [2023-11-24 21:44:07,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:07,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977660139] [2023-11-24 21:44:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:07,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:07,277 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 21:44:07,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:07,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977660139] [2023-11-24 21:44:07,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977660139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:07,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:07,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:44:07,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112394167] [2023-11-24 21:44:07,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:07,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:44:07,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:44:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:44:07,281 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 21:44:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:07,357 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-11-24 21:44:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:07,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 21:44:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:07,359 INFO L225 Difference]: With dead ends: 65 [2023-11-24 21:44:07,359 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 21:44:07,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 21:44:07,361 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:07,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 105 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:44:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 21:44:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 33. [2023-11-24 21:44:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 32 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 21:44:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-24 21:44:07,366 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 9 [2023-11-24 21:44:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:07,367 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-24 21:44:07,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 21:44:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-24 21:44:07,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:44:07,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:07,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:44:07,369 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:07,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1934367044, now seen corresponding path program 1 times [2023-11-24 21:44:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:07,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702275692] [2023-11-24 21:44:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:07,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:07,514 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 21:44:07,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:07,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702275692] [2023-11-24 21:44:07,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702275692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:07,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:07,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:44:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115579105] [2023-11-24 21:44:07,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:44:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:07,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:44:07,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:44:07,517 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 21:44:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:07,588 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-11-24 21:44:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:44:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 21:44:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:07,590 INFO L225 Difference]: With dead ends: 43 [2023-11-24 21:44:07,590 INFO L226 Difference]: Without dead ends: 43 [2023-11-24 21:44:07,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:44:07,591 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:07,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 44 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:44:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-24 21:44:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2023-11-24 21:44:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5) 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 21:44:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-24 21:44:07,596 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 9 [2023-11-24 21:44:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:07,596 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-24 21:44:07,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 21:44:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-24 21:44:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:44:07,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:07,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:07,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:44:07,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:07,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1845621127, now seen corresponding path program 1 times [2023-11-24 21:44:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973559978] [2023-11-24 21:44:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:07,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:07,788 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 21:44:07,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:07,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973559978] [2023-11-24 21:44:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973559978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:07,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:44:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720574013] [2023-11-24 21:44:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:44:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:07,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:44:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:44:07,793 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 21:44:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:07,897 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-24 21:44:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:44:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:44:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:07,901 INFO L225 Difference]: With dead ends: 28 [2023-11-24 21:44:07,901 INFO L226 Difference]: Without dead ends: 28 [2023-11-24 21:44:07,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:44:07,903 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:07,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 41 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-24 21:44:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-24 21:44:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 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 21:44:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-24 21:44:07,916 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2023-11-24 21:44:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:07,918 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-24 21:44:07,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 21:44:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-24 21:44:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:44:07,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:07,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:07,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:44:07,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:07,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1845621128, now seen corresponding path program 1 times [2023-11-24 21:44:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:07,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105294392] [2023-11-24 21:44:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:08,276 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 21:44:08,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105294392] [2023-11-24 21:44:08,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105294392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:08,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:08,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:44:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053489701] [2023-11-24 21:44:08,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:08,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:44:08,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:44:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:44:08,279 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 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 21:44:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:08,468 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2023-11-24 21:44:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:44:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:44:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:08,470 INFO L225 Difference]: With dead ends: 34 [2023-11-24 21:44:08,470 INFO L226 Difference]: Without dead ends: 34 [2023-11-24 21:44:08,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:44:08,471 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:08,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 49 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-24 21:44:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2023-11-24 21:44:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 29 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 21:44:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-24 21:44:08,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 12 [2023-11-24 21:44:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:08,476 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-24 21:44:08,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 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 21:44:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-24 21:44:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:44:08,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:08,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:08,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:44:08,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:08,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1379680104, now seen corresponding path program 1 times [2023-11-24 21:44:08,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:08,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842028695] [2023-11-24 21:44:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:08,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:08,772 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 21:44:08,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842028695] [2023-11-24 21:44:08,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842028695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:08,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:08,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:44:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618347884] [2023-11-24 21:44:08,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:08,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:44:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:44:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:44:08,774 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) 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 21:44:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:08,908 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-24 21:44:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:44:08,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) 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 21:44:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:08,909 INFO L225 Difference]: With dead ends: 31 [2023-11-24 21:44:08,909 INFO L226 Difference]: Without dead ends: 31 [2023-11-24 21:44:08,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:44:08,910 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:08,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 50 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-24 21:44:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-24 21:44:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) 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 21:44:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-24 21:44:08,913 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 13 [2023-11-24 21:44:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:08,913 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-24 21:44:08,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) 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 21:44:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-24 21:44:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:44:08,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:08,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:08,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:44:08,915 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:08,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1379680105, now seen corresponding path program 1 times [2023-11-24 21:44:08,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:08,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669490533] [2023-11-24 21:44:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:08,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:09,441 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 21:44:09,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:09,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669490533] [2023-11-24 21:44:09,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669490533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:09,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:09,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:44:09,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127571055] [2023-11-24 21:44:09,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:09,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:44:09,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:44:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:44:09,445 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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 21:44:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:09,921 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-24 21:44:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:44:09,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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 21:44:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:09,923 INFO L225 Difference]: With dead ends: 56 [2023-11-24 21:44:09,923 INFO L226 Difference]: Without dead ends: 56 [2023-11-24 21:44:09,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:44:09,924 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:09,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 118 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:44:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-24 21:44:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2023-11-24 21:44:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 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 21:44:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-24 21:44:09,932 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2023-11-24 21:44:09,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:09,933 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-24 21:44:09,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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 21:44:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-24 21:44:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:44:09,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:09,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:09,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:44:09,935 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:09,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:09,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2080744683, now seen corresponding path program 1 times [2023-11-24 21:44:09,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:09,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076164571] [2023-11-24 21:44:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:09,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:10,538 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 21:44:10,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:10,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076164571] [2023-11-24 21:44:10,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076164571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:10,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:10,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:44:10,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458959356] [2023-11-24 21:44:10,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:10,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:44:10,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:44:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:44:10,540 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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 21:44:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:10,923 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-11-24 21:44:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:44:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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 21:44:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:10,925 INFO L225 Difference]: With dead ends: 41 [2023-11-24 21:44:10,925 INFO L226 Difference]: Without dead ends: 41 [2023-11-24 21:44:10,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:44:10,926 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:10,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 71 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-24 21:44:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2023-11-24 21:44:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.36) internal successors, (34), 29 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 21:44:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-24 21:44:10,929 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 13 [2023-11-24 21:44:10,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:10,930 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-24 21:44:10,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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 21:44:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-24 21:44:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:44:10,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:10,931 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:10,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:44:10,931 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:10,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1373647826, now seen corresponding path program 1 times [2023-11-24 21:44:10,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:10,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604464899] [2023-11-24 21:44:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:10,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:11,107 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 21:44:11,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:11,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604464899] [2023-11-24 21:44:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604464899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:11,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:11,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:44:11,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958288967] [2023-11-24 21:44:11,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:11,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:44:11,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:44:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:44:11,110 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:11,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:11,202 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-24 21:44:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:44:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-24 21:44:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:11,204 INFO L225 Difference]: With dead ends: 53 [2023-11-24 21:44:11,204 INFO L226 Difference]: Without dead ends: 53 [2023-11-24 21:44:11,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:44:11,206 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:11,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-24 21:44:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2023-11-24 21:44:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 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 21:44:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-24 21:44:11,210 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 17 [2023-11-24 21:44:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:11,210 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-24 21:44:11,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-24 21:44:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:44:11,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:11,212 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:11,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:44:11,213 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:11,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash 93784148, now seen corresponding path program 1 times [2023-11-24 21:44:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:11,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198948342] [2023-11-24 21:44:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:11,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:11,510 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 21:44:11,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:11,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198948342] [2023-11-24 21:44:11,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198948342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:11,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:11,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:44:11,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487310812] [2023-11-24 21:44:11,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:11,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:44:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:44:11,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:44:11,514 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:11,693 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2023-11-24 21:44:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:44:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-24 21:44:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:11,695 INFO L225 Difference]: With dead ends: 75 [2023-11-24 21:44:11,695 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 21:44:11,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:44:11,697 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:11,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 162 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 21:44:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2023-11-24 21:44:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 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 21:44:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-24 21:44:11,701 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 17 [2023-11-24 21:44:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:11,702 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-24 21:44:11,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-24 21:44:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:44:11,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:11,707 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:11,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:44:11,707 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:11,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -927284206, now seen corresponding path program 1 times [2023-11-24 21:44:11,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:11,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341703677] [2023-11-24 21:44:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:11,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:12,393 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 21:44:12,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:12,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341703677] [2023-11-24 21:44:12,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341703677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:12,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155491251] [2023-11-24 21:44:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:12,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:12,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:12,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:44:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:12,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-24 21:44:12,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:12,624 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 21:44:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:12,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:44:12,667 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:44:12,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:44:13,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:44:13,106 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 21:44:13,226 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 21:44:13,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:44:13,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:44:13,712 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 21:44:13,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-24 21:44:13,730 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:44:13,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-24 21:44:13,739 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 21:44:13,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155491251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:13,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-24 21:44:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430765765] [2023-11-24 21:44:13,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:44:13,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:44:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:44:13,742 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:14,920 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2023-11-24 21:44:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:44:14,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-24 21:44:14,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:14,923 INFO L225 Difference]: With dead ends: 62 [2023-11-24 21:44:14,923 INFO L226 Difference]: Without dead ends: 62 [2023-11-24 21:44:14,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:44:14,924 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 238 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:14,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 144 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:44:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-24 21:44:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2023-11-24 21:44:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 57 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 21:44:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2023-11-24 21:44:14,928 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 17 [2023-11-24 21:44:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:14,928 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2023-11-24 21:44:14,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2023-11-24 21:44:14,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:44:14,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:14,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:14,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:15,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:44:15,130 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:15,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:15,130 INFO L85 PathProgramCache]: Analyzing trace with hash -416354124, now seen corresponding path program 1 times [2023-11-24 21:44:15,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:15,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880292197] [2023-11-24 21:44:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:15,219 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 21:44:15,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:15,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880292197] [2023-11-24 21:44:15,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880292197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:15,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:15,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:44:15,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546944945] [2023-11-24 21:44:15,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:15,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:44:15,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:15,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:44:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:44:15,222 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:15,293 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-11-24 21:44:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:44:15,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:44:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:15,295 INFO L225 Difference]: With dead ends: 57 [2023-11-24 21:44:15,295 INFO L226 Difference]: Without dead ends: 57 [2023-11-24 21:44:15,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:44:15,296 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:15,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 47 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-24 21:44:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-24 21:44:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 56 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2023-11-24 21:44:15,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 18 [2023-11-24 21:44:15,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:15,302 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2023-11-24 21:44:15,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:15,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2023-11-24 21:44:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:44:15,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:15,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:15,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:44:15,305 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:15,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:15,305 INFO L85 PathProgramCache]: Analyzing trace with hash -416354123, now seen corresponding path program 1 times [2023-11-24 21:44:15,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:15,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871453792] [2023-11-24 21:44:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:15,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:15,466 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 21:44:15,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:15,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871453792] [2023-11-24 21:44:15,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871453792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:15,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:15,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:44:15,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849997001] [2023-11-24 21:44:15,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:15,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:44:15,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:44:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:44:15,470 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 21:44:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:15,564 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-11-24 21:44:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:44:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:44:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:15,566 INFO L225 Difference]: With dead ends: 75 [2023-11-24 21:44:15,566 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 21:44:15,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:44:15,567 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:15,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:44:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 21:44:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2023-11-24 21:44:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 70 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-11-24 21:44:15,570 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 18 [2023-11-24 21:44:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:15,570 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-11-24 21:44:15,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 21:44:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-11-24 21:44:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:44:15,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:15,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:15,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:44:15,572 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:15,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1437422477, now seen corresponding path program 1 times [2023-11-24 21:44:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:15,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411134874] [2023-11-24 21:44:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:15,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:16,730 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 21:44:16,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:16,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411134874] [2023-11-24 21:44:16,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411134874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:16,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:16,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-24 21:44:16,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803142591] [2023-11-24 21:44:16,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:16,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:44:16,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:44:16,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:44:16,733 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 21:44:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:17,694 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2023-11-24 21:44:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:44:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:44:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:17,696 INFO L225 Difference]: With dead ends: 75 [2023-11-24 21:44:17,696 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 21:44:17,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:44:17,697 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 71 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:17,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 60 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:44:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 21:44:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-24 21:44:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-11-24 21:44:17,700 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 18 [2023-11-24 21:44:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:17,700 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-11-24 21:44:17,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 21:44:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-11-24 21:44:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:44:17,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:17,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:17,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:44:17,702 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:17,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1954955522, now seen corresponding path program 1 times [2023-11-24 21:44:17,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:17,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904294548] [2023-11-24 21:44:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:17,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:18,070 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 21:44:18,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:18,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904294548] [2023-11-24 21:44:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904294548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:18,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:18,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:18,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602761779] [2023-11-24 21:44:18,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:44:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:44:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:44:18,073 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 21:44:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:18,127 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2023-11-24 21:44:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:44:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:18,128 INFO L225 Difference]: With dead ends: 74 [2023-11-24 21:44:18,129 INFO L226 Difference]: Without dead ends: 45 [2023-11-24 21:44:18,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:44:18,130 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:18,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:44:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-24 21:44:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-24 21:44:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 44 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 21:44:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-11-24 21:44:18,134 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 18 [2023-11-24 21:44:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:18,134 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-11-24 21:44:18,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 21:44:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-11-24 21:44:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:44:18,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:18,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:18,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:44:18,136 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:18,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1318960671, now seen corresponding path program 1 times [2023-11-24 21:44:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:18,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477117218] [2023-11-24 21:44:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:18,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:19,160 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 21:44:19,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:19,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477117218] [2023-11-24 21:44:19,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477117218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:19,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950810682] [2023-11-24 21:44:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:19,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:19,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:19,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:19,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:44:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:19,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-24 21:44:19,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:19,355 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 21:44:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:19,361 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 21:44:19,423 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:44:19,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-24 21:44:19,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:44:19,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:44:19,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-24 21:44:19,663 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 7 [2023-11-24 21:44:20,269 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 21:44:20,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:21,215 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 21:44:21,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950810682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:21,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:21,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2023-11-24 21:44:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840706803] [2023-11-24 21:44:21,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:21,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-24 21:44:21,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:21,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-24 21:44:21,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 21:44:21,220 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 35 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 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 21:44:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:24,631 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-11-24 21:44:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:44:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:44:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:24,633 INFO L225 Difference]: With dead ends: 48 [2023-11-24 21:44:24,633 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 21:44:24,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=324, Invalid=2126, Unknown=0, NotChecked=0, Total=2450 [2023-11-24 21:44:24,635 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 200 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:24,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 82 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:44:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 21:44:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-11-24 21:44:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 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 21:44:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-11-24 21:44:24,638 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 18 [2023-11-24 21:44:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:24,638 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-11-24 21:44:24,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 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 21:44:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-11-24 21:44:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:44:24,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:24,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:24,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:24,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:24,848 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:44:24,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1427940954, now seen corresponding path program 1 times [2023-11-24 21:44:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:24,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841660889] [2023-11-24 21:44:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:24,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:26,077 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 21:44:26,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:26,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841660889] [2023-11-24 21:44:26,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841660889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934366530] [2023-11-24 21:44:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:26,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:26,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:26,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca3df5ed-c66c-48f9-bf80-f6656d6fdc7f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:44:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:26,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-24 21:44:26,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:26,419 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 21:44:26,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:44:26,506 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:44:26,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-24 21:44:26,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:44:26,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:44:26,743 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 27 treesize of output 15 [2023-11-24 21:44:26,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:44:27,827 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 21:44:27,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:36,928 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:44:36,934 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 21:44:36,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934366530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:36,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:36,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 39 [2023-11-24 21:44:36,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672173996] [2023-11-24 21:44:36,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:36,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-24 21:44:36,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:36,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-24 21:44:36,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1417, Unknown=1, NotChecked=0, Total=1560 [2023-11-24 21:44:36,938 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 40 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 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 21:44:45,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-24 21:44:50,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-24 21:44:54,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]