./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/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_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:40:37,605 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:40:37,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:40:37,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:40:37,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:40:37,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:40:37,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:40:37,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:40:37,787 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:40:37,788 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:40:37,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:40:37,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:40:37,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:40:37,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:40:37,791 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:40:37,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:40:37,792 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:40:37,792 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:40:37,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:40:37,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:40:37,794 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:40:37,795 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:40:37,795 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:40:37,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:40:37,796 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:40:37,797 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:40:37,797 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:40:37,798 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:40:37,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:40:37,799 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:40:37,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:40:37,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:40:37,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:40:37,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:40:37,801 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:40:37,801 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:40:37,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:40:37,802 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:40:37,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:40:37,803 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:40:37,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:40:37,804 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_5cece1b9-ae60-4431-a70d-2b7e573fbc73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab [2023-11-24 21:40:38,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:40:38,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:40:38,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:40:38,200 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:40:38,201 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:40:38,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2023-11-24 21:40:41,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:40:41,736 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:40:41,747 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2023-11-24 21:40:41,771 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/data/16b994550/051a2afc8e99497dbb8efc967d9ceaef/FLAG927e214bd [2023-11-24 21:40:41,790 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/data/16b994550/051a2afc8e99497dbb8efc967d9ceaef [2023-11-24 21:40:41,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:40:41,803 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:40:41,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:40:41,805 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:40:41,810 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:40:41,811 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:40:41" (1/1) ... [2023-11-24 21:40:41,812 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40962aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:41, skipping insertion in model container [2023-11-24 21:40:41,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:40:41" (1/1) ... [2023-11-24 21:40:41,883 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:40:42,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:40:42,614 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:40:42,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:40:42,812 WARN L675 CHandler]: The function strncpy is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:40:42,821 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:40:42,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42 WrapperNode [2023-11-24 21:40:42,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:40:42,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:40:42,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:40:42,824 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:40:42,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:42,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:42,943 INFO L138 Inliner]: procedures = 184, calls = 150, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 234 [2023-11-24 21:40:42,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:40:42,950 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:40:42,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:40:42,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:40:42,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:42,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:42,973 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:43,046 INFO L175 MemorySlicer]: Split 93 memory accesses to 3 slices as follows [2, 19, 72]. 77 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 9, 0]. The 44 writes are split as follows [0, 6, 38]. [2023-11-24 21:40:43,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:43,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:43,104 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:43,122 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:43,137 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:43,141 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:43,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:40:43,165 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:40:43,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:40:43,165 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:40:43,166 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (1/1) ... [2023-11-24 21:40:43,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:40:43,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:40:43,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:40:43,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cece1b9-ae60-4431-a70d-2b7e573fbc73/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:40:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:40:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:40:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:40:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-24 21:40:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-24 21:40:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure event_precess [2023-11-24 21:40:43,283 INFO L138 BoogieDeclarations]: Found implementation of procedure event_precess [2023-11-24 21:40:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:40:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:40:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:40:43,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:40:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure ASNull [2023-11-24 21:40:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ASNull [2023-11-24 21:40:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:40:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:40:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:40:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:40:43,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:40:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure ASStart [2023-11-24 21:40:43,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStart [2023-11-24 21:40:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure status_update [2023-11-24 21:40:43,289 INFO L138 BoogieDeclarations]: Found implementation of procedure status_update [2023-11-24 21:40:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure message_send [2023-11-24 21:40:43,289 INFO L138 BoogieDeclarations]: Found implementation of procedure message_send [2023-11-24 21:40:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:40:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:40:43,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:40:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure ASIdle [2023-11-24 21:40:43,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ASIdle [2023-11-24 21:40:43,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:40:43,292 INFO L130 BoogieDeclarations]: Found specification of procedure system_initialize [2023-11-24 21:40:43,292 INFO L138 BoogieDeclarations]: Found implementation of procedure system_initialize [2023-11-24 21:40:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:40:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:40:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:40:43,293 INFO L130 BoogieDeclarations]: Found specification of procedure ASStop [2023-11-24 21:40:43,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStop [2023-11-24 21:40:43,294 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2023-11-24 21:40:43,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:40:43,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:40:43,557 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:40:43,560 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:40:44,693 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:40:44,833 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:40:44,840 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:40:44,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:40:44 BoogieIcfgContainer [2023-11-24 21:40:44,841 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:40:44,843 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:40:44,845 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:40:44,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:40:44,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:40:41" (1/3) ... [2023-11-24 21:40:44,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@884db33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:40:44, skipping insertion in model container [2023-11-24 21:40:44,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:42" (2/3) ... [2023-11-24 21:40:44,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@884db33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:40:44, skipping insertion in model container [2023-11-24 21:40:44,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:40:44" (3/3) ... [2023-11-24 21:40:44,875 INFO L112 eAbstractionObserver]: Analyzing ICFG system-with-recursion.i [2023-11-24 21:40:44,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:40:44,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 162 error locations. [2023-11-24 21:40:44,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:40:44,974 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;@62847326, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:40:44,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 162 error locations. [2023-11-24 21:40:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 362 states, 161 states have (on average 2.186335403726708) internal successors, (352), 323 states have internal predecessors, (352), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-24 21:40:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:40:44,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:44,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:40:44,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:44,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 623714232, now seen corresponding path program 1 times [2023-11-24 21:40:45,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:45,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249298861] [2023-11-24 21:40:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:45,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:45,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:45,453 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 21:40:45,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:45,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249298861] [2023-11-24 21:40:45,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249298861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:45,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:45,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:45,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871891504] [2023-11-24 21:40:45,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:45,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:40:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:45,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:40:45,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:45,542 INFO L87 Difference]: Start difference. First operand has 362 states, 161 states have (on average 2.186335403726708) internal successors, (352), 323 states have internal predecessors, (352), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:46,732 INFO L93 Difference]: Finished difference Result 436 states and 542 transitions. [2023-11-24 21:40:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:40:46,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 5 [2023-11-24 21:40:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:46,768 INFO L225 Difference]: With dead ends: 436 [2023-11-24 21:40:46,768 INFO L226 Difference]: Without dead ends: 435 [2023-11-24 21:40:46,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:40:46,777 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 538 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:46,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 308 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:40:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-24 21:40:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 356. [2023-11-24 21:40:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 174 states have (on average 2.0) internal successors, (348), 312 states have internal predecessors, (348), 32 states have call successors, (32), 11 states have call predecessors, (32), 11 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2023-11-24 21:40:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 417 transitions. [2023-11-24 21:40:46,891 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 417 transitions. Word has length 5 [2023-11-24 21:40:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:46,892 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 417 transitions. [2023-11-24 21:40:46,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 417 transitions. [2023-11-24 21:40:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:40:46,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:46,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:40:46,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:40:46,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:46,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash 623714233, now seen corresponding path program 1 times [2023-11-24 21:40:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:46,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570993420] [2023-11-24 21:40:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:46,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:47,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:47,161 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 21:40:47,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:47,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570993420] [2023-11-24 21:40:47,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570993420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:47,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:47,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:40:47,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044378081] [2023-11-24 21:40:47,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:47,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:40:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:40:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:40:47,166 INFO L87 Difference]: Start difference. First operand 356 states and 417 transitions. Second operand has 5 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:48,134 INFO L93 Difference]: Finished difference Result 502 states and 646 transitions. [2023-11-24 21:40:48,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:40:48,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 5 [2023-11-24 21:40:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:48,150 INFO L225 Difference]: With dead ends: 502 [2023-11-24 21:40:48,152 INFO L226 Difference]: Without dead ends: 502 [2023-11-24 21:40:48,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:40:48,155 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 358 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:48,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 786 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:40:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-24 21:40:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 422. [2023-11-24 21:40:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 228 states have (on average 1.8728070175438596) internal successors, (427), 363 states have internal predecessors, (427), 42 states have call successors, (42), 18 states have call predecessors, (42), 19 states have return successors, (55), 40 states have call predecessors, (55), 42 states have call successors, (55) [2023-11-24 21:40:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 524 transitions. [2023-11-24 21:40:48,215 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 524 transitions. Word has length 5 [2023-11-24 21:40:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:48,215 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 524 transitions. [2023-11-24 21:40:48,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 524 transitions. [2023-11-24 21:40:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:40:48,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:48,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:48,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:40:48,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:48,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:48,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1042625853, now seen corresponding path program 1 times [2023-11-24 21:40:48,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:48,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321583550] [2023-11-24 21:40:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:48,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:48,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:48,545 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 21:40:48,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:48,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321583550] [2023-11-24 21:40:48,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321583550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:48,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:48,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:40:48,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021321120] [2023-11-24 21:40:48,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:48,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:40:48,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:48,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:40:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:40:48,551 INFO L87 Difference]: Start difference. First operand 422 states and 524 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:49,387 INFO L93 Difference]: Finished difference Result 476 states and 624 transitions. [2023-11-24 21:40:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:40:49,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-24 21:40:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:49,397 INFO L225 Difference]: With dead ends: 476 [2023-11-24 21:40:49,397 INFO L226 Difference]: Without dead ends: 476 [2023-11-24 21:40:49,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:40:49,403 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 152 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:49,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1039 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:40:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-24 21:40:49,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 421. [2023-11-24 21:40:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 228 states have (on average 1.868421052631579) internal successors, (426), 362 states have internal predecessors, (426), 42 states have call successors, (42), 18 states have call predecessors, (42), 19 states have return successors, (55), 40 states have call predecessors, (55), 42 states have call successors, (55) [2023-11-24 21:40:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 523 transitions. [2023-11-24 21:40:49,468 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 523 transitions. Word has length 8 [2023-11-24 21:40:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:49,469 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 523 transitions. [2023-11-24 21:40:49,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 523 transitions. [2023-11-24 21:40:49,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:40:49,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:49,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:49,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:40:49,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:49,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:49,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1042625854, now seen corresponding path program 1 times [2023-11-24 21:40:49,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:49,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043687184] [2023-11-24 21:40:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:49,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:49,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:49,824 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 21:40:49,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:49,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043687184] [2023-11-24 21:40:49,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043687184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:49,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:49,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:40:49,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981518038] [2023-11-24 21:40:49,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:49,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:40:49,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:40:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:40:49,833 INFO L87 Difference]: Start difference. First operand 421 states and 523 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:50,780 INFO L93 Difference]: Finished difference Result 475 states and 623 transitions. [2023-11-24 21:40:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:40:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-24 21:40:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:50,786 INFO L225 Difference]: With dead ends: 475 [2023-11-24 21:40:50,786 INFO L226 Difference]: Without dead ends: 475 [2023-11-24 21:40:50,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:40:50,787 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 149 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:50,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1017 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:40:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-11-24 21:40:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 420. [2023-11-24 21:40:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 228 states have (on average 1.8640350877192982) internal successors, (425), 361 states have internal predecessors, (425), 42 states have call successors, (42), 18 states have call predecessors, (42), 19 states have return successors, (55), 40 states have call predecessors, (55), 42 states have call successors, (55) [2023-11-24 21:40:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 522 transitions. [2023-11-24 21:40:50,816 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 522 transitions. Word has length 8 [2023-11-24 21:40:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:50,817 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 522 transitions. [2023-11-24 21:40:50,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 522 transitions. [2023-11-24 21:40:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:40:50,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:50,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:40:50,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:50,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1717601966, now seen corresponding path program 1 times [2023-11-24 21:40:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:50,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087032750] [2023-11-24 21:40:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:50,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:50,910 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 21:40:50,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:50,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087032750] [2023-11-24 21:40:50,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087032750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:50,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:50,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:50,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184830424] [2023-11-24 21:40:50,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:50,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:40:50,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:40:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:50,913 INFO L87 Difference]: Start difference. First operand 420 states and 522 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:51,430 INFO L93 Difference]: Finished difference Result 474 states and 622 transitions. [2023-11-24 21:40:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:40:51,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-24 21:40:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:51,435 INFO L225 Difference]: With dead ends: 474 [2023-11-24 21:40:51,435 INFO L226 Difference]: Without dead ends: 474 [2023-11-24 21:40:51,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:51,437 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 144 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:51,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 655 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:40:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-24 21:40:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 419. [2023-11-24 21:40:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 228 states have (on average 1.8596491228070176) internal successors, (424), 360 states have internal predecessors, (424), 42 states have call successors, (42), 18 states have call predecessors, (42), 19 states have return successors, (55), 40 states have call predecessors, (55), 42 states have call successors, (55) [2023-11-24 21:40:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 521 transitions. [2023-11-24 21:40:51,462 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 521 transitions. Word has length 12 [2023-11-24 21:40:51,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:51,463 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 521 transitions. [2023-11-24 21:40:51,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 521 transitions. [2023-11-24 21:40:51,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:40:51,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:51,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:51,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:40:51,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:51,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:51,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1717601965, now seen corresponding path program 1 times [2023-11-24 21:40:51,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:51,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130239944] [2023-11-24 21:40:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:51,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:51,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:51,646 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 21:40:51,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:51,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130239944] [2023-11-24 21:40:51,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130239944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:51,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:51,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:51,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154439443] [2023-11-24 21:40:51,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:51,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:40:51,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:40:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:51,650 INFO L87 Difference]: Start difference. First operand 419 states and 521 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:52,149 INFO L93 Difference]: Finished difference Result 473 states and 621 transitions. [2023-11-24 21:40:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:40:52,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-24 21:40:52,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:52,154 INFO L225 Difference]: With dead ends: 473 [2023-11-24 21:40:52,154 INFO L226 Difference]: Without dead ends: 473 [2023-11-24 21:40:52,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:52,156 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 143 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:52,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 637 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:40:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-11-24 21:40:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 418. [2023-11-24 21:40:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 228 states have (on average 1.855263157894737) internal successors, (423), 359 states have internal predecessors, (423), 42 states have call successors, (42), 18 states have call predecessors, (42), 19 states have return successors, (55), 40 states have call predecessors, (55), 42 states have call successors, (55) [2023-11-24 21:40:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 520 transitions. [2023-11-24 21:40:52,178 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 520 transitions. Word has length 12 [2023-11-24 21:40:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:52,179 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 520 transitions. [2023-11-24 21:40:52,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 520 transitions. [2023-11-24 21:40:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:40:52,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:52,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:52,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:40:52,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ASNullErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:52,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1901166374, now seen corresponding path program 1 times [2023-11-24 21:40:52,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:52,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492231987] [2023-11-24 21:40:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:52,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:52,361 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 21:40:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492231987] [2023-11-24 21:40:52,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492231987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:52,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:52,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:40:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704858410] [2023-11-24 21:40:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:52,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:40:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:40:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:40:52,364 INFO L87 Difference]: Start difference. First operand 418 states and 520 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:53,287 INFO L93 Difference]: Finished difference Result 506 states and 679 transitions. [2023-11-24 21:40:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:40:53,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-24 21:40:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:53,292 INFO L225 Difference]: With dead ends: 506 [2023-11-24 21:40:53,292 INFO L226 Difference]: Without dead ends: 506 [2023-11-24 21:40:53,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:40:53,294 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 220 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:53,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1399 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:40:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2023-11-24 21:40:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 438. [2023-11-24 21:40:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 244 states have (on average 1.8319672131147542) internal successors, (447), 376 states have internal predecessors, (447), 43 states have call successors, (43), 20 states have call predecessors, (43), 22 states have return successors, (59), 41 states have call predecessors, (59), 43 states have call successors, (59) [2023-11-24 21:40:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 549 transitions. [2023-11-24 21:40:53,321 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 549 transitions. Word has length 20 [2023-11-24 21:40:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:53,321 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 549 transitions. [2023-11-24 21:40:53,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 549 transitions. [2023-11-24 21:40:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:40:53,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:53,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:53,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:40:53,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ASNullErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:53,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:53,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1901166373, now seen corresponding path program 1 times [2023-11-24 21:40:53,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:53,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653571557] [2023-11-24 21:40:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:53,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:53,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:53,679 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 21:40:53,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:53,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653571557] [2023-11-24 21:40:53,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653571557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:53,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:53,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:40:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85786139] [2023-11-24 21:40:53,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:53,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:40:53,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:53,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:40:53,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:40:53,685 INFO L87 Difference]: Start difference. First operand 438 states and 549 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:54,778 INFO L93 Difference]: Finished difference Result 505 states and 678 transitions. [2023-11-24 21:40:54,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:40:54,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-24 21:40:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:54,783 INFO L225 Difference]: With dead ends: 505 [2023-11-24 21:40:54,783 INFO L226 Difference]: Without dead ends: 505 [2023-11-24 21:40:54,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:40:54,784 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 211 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:54,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1336 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:40:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-11-24 21:40:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 438. [2023-11-24 21:40:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 244 states have (on average 1.8278688524590163) internal successors, (446), 376 states have internal predecessors, (446), 43 states have call successors, (43), 20 states have call predecessors, (43), 22 states have return successors, (59), 41 states have call predecessors, (59), 43 states have call successors, (59) [2023-11-24 21:40:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 548 transitions. [2023-11-24 21:40:54,804 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 548 transitions. Word has length 20 [2023-11-24 21:40:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:54,805 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 548 transitions. [2023-11-24 21:40:54,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 548 transitions. [2023-11-24 21:40:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:40:54,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:54,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:54,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:40:54,807 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:54,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1190591824, now seen corresponding path program 1 times [2023-11-24 21:40:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:54,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293023118] [2023-11-24 21:40:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:54,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:54,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:54,986 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 21:40:54,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:54,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293023118] [2023-11-24 21:40:54,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293023118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:54,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:54,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:40:54,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683526452] [2023-11-24 21:40:54,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:54,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:40:54,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:54,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:40:54,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:40:54,989 INFO L87 Difference]: Start difference. First operand 438 states and 548 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:56,016 INFO L93 Difference]: Finished difference Result 592 states and 803 transitions. [2023-11-24 21:40:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:40:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-24 21:40:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:56,022 INFO L225 Difference]: With dead ends: 592 [2023-11-24 21:40:56,022 INFO L226 Difference]: Without dead ends: 592 [2023-11-24 21:40:56,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:40:56,024 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 340 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:56,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 1309 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:40:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2023-11-24 21:40:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 473. [2023-11-24 21:40:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 270 states have (on average 1.8111111111111111) internal successors, (489), 405 states have internal predecessors, (489), 49 states have call successors, (49), 24 states have call predecessors, (49), 25 states have return successors, (71), 43 states have call predecessors, (71), 49 states have call successors, (71) [2023-11-24 21:40:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 609 transitions. [2023-11-24 21:40:56,077 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 609 transitions. Word has length 21 [2023-11-24 21:40:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:56,078 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 609 transitions. [2023-11-24 21:40:56,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 609 transitions. [2023-11-24 21:40:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:40:56,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:56,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:56,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:40:56,083 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:56,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1190591825, now seen corresponding path program 1 times [2023-11-24 21:40:56,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:56,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381824077] [2023-11-24 21:40:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:56,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:56,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:56,426 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 21:40:56,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:56,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381824077] [2023-11-24 21:40:56,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381824077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:56,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:56,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:40:56,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614819721] [2023-11-24 21:40:56,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:56,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:40:56,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:56,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:40:56,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:40:56,430 INFO L87 Difference]: Start difference. First operand 473 states and 609 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:57,144 INFO L93 Difference]: Finished difference Result 493 states and 616 transitions. [2023-11-24 21:40:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:40:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-24 21:40:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:57,150 INFO L225 Difference]: With dead ends: 493 [2023-11-24 21:40:57,150 INFO L226 Difference]: Without dead ends: 493 [2023-11-24 21:40:57,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:40:57,151 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 231 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:57,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1272 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:40:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-11-24 21:40:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 470. [2023-11-24 21:40:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 263 states have (on average 1.7452471482889733) internal successors, (459), 395 states have internal predecessors, (459), 47 states have call successors, (47), 22 states have call predecessors, (47), 31 states have return successors, (99), 52 states have call predecessors, (99), 47 states have call successors, (99) [2023-11-24 21:40:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 605 transitions. [2023-11-24 21:40:57,182 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 605 transitions. Word has length 21 [2023-11-24 21:40:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:57,184 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 605 transitions. [2023-11-24 21:40:57,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:40:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 605 transitions. [2023-11-24 21:40:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 21:40:57,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:57,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:57,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:40:57,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:57,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1908770742, now seen corresponding path program 1 times [2023-11-24 21:40:57,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:57,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435190351] [2023-11-24 21:40:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:57,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:40:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:57,406 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 21:40:57,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:57,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435190351] [2023-11-24 21:40:57,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435190351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:57,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:57,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:40:57,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337242099] [2023-11-24 21:40:57,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:57,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:40:57,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:57,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:40:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:40:57,409 INFO L87 Difference]: Start difference. First operand 470 states and 605 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:40:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:58,047 INFO L93 Difference]: Finished difference Result 490 states and 623 transitions. [2023-11-24 21:40:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:40:58,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-24 21:40:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:58,053 INFO L225 Difference]: With dead ends: 490 [2023-11-24 21:40:58,054 INFO L226 Difference]: Without dead ends: 486 [2023-11-24 21:40:58,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:40:58,055 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 164 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:58,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1180 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:40:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-11-24 21:40:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 479. [2023-11-24 21:40:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 270 states have (on average 1.7333333333333334) internal successors, (468), 403 states have internal predecessors, (468), 47 states have call successors, (47), 23 states have call predecessors, (47), 33 states have return successors, (99), 52 states have call predecessors, (99), 47 states have call successors, (99) [2023-11-24 21:40:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 614 transitions. [2023-11-24 21:40:58,085 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 614 transitions. Word has length 30 [2023-11-24 21:40:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:58,085 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 614 transitions. [2023-11-24 21:40:58,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:40:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 614 transitions. [2023-11-24 21:40:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:40:58,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:58,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:58,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:40:58,092 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:40:58,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2039089993, now seen corresponding path program 1 times [2023-11-24 21:40:58,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:58,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456243850] [2023-11-24 21:40:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:58,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:58,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:40:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:58,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-24 21:40:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:58,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-24 21:40:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:58,618 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 21:40:58,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:58,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456243850] [2023-11-24 21:40:58,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456243850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:58,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:58,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:40:58,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20906643] [2023-11-24 21:40:58,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:58,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:40:58,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:40:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:40:58,622 INFO L87 Difference]: Start difference. First operand 479 states and 614 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:41:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:00,158 INFO L93 Difference]: Finished difference Result 505 states and 669 transitions. [2023-11-24 21:41:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:41:00,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-11-24 21:41:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:00,163 INFO L225 Difference]: With dead ends: 505 [2023-11-24 21:41:00,163 INFO L226 Difference]: Without dead ends: 499 [2023-11-24 21:41:00,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:41:00,164 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 313 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:00,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1765 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:41:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-24 21:41:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2023-11-24 21:41:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 269 states have (on average 1.7323420074349443) internal successors, (466), 401 states have internal predecessors, (466), 47 states have call successors, (47), 23 states have call predecessors, (47), 32 states have return successors, (98), 52 states have call predecessors, (98), 47 states have call successors, (98) [2023-11-24 21:41:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 611 transitions. [2023-11-24 21:41:00,197 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 611 transitions. Word has length 29 [2023-11-24 21:41:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:00,197 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 611 transitions. [2023-11-24 21:41:00,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:41:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 611 transitions. [2023-11-24 21:41:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:41:00,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:00,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:00,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:41:00,200 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:00,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash -645868780, now seen corresponding path program 1 times [2023-11-24 21:41:00,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:00,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488696411] [2023-11-24 21:41:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:00,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:00,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:00,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:00,653 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 21:41:00,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:00,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488696411] [2023-11-24 21:41:00,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488696411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:00,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:00,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:41:00,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816577510] [2023-11-24 21:41:00,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:00,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:41:00,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:41:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:41:00,657 INFO L87 Difference]: Start difference. First operand 477 states and 611 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:41:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:01,927 INFO L93 Difference]: Finished difference Result 458 states and 571 transitions. [2023-11-24 21:41:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:41:01,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-24 21:41:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:01,932 INFO L225 Difference]: With dead ends: 458 [2023-11-24 21:41:01,932 INFO L226 Difference]: Without dead ends: 456 [2023-11-24 21:41:01,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:41:01,934 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 196 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:01,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1555 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:41:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-11-24 21:41:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 412. [2023-11-24 21:41:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 222 states have (on average 1.8153153153153154) internal successors, (403), 356 states have internal predecessors, (403), 40 states have call successors, (40), 19 states have call predecessors, (40), 21 states have return successors, (58), 36 states have call predecessors, (58), 40 states have call successors, (58) [2023-11-24 21:41:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 501 transitions. [2023-11-24 21:41:01,961 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 501 transitions. Word has length 32 [2023-11-24 21:41:01,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:01,962 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 501 transitions. [2023-11-24 21:41:01,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:41:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 501 transitions. [2023-11-24 21:41:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 21:41:01,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:01,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:01,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:41:01,965 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting system_initializeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:01,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1467299206, now seen corresponding path program 1 times [2023-11-24 21:41:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:01,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800423265] [2023-11-24 21:41:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:01,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:02,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:02,573 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 21:41:02,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:02,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800423265] [2023-11-24 21:41:02,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800423265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:02,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:02,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:41:02,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252954711] [2023-11-24 21:41:02,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:02,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:41:02,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:41:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:41:02,579 INFO L87 Difference]: Start difference. First operand 412 states and 501 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:41:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:03,826 INFO L93 Difference]: Finished difference Result 463 states and 599 transitions. [2023-11-24 21:41:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:41:03,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-11-24 21:41:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:03,832 INFO L225 Difference]: With dead ends: 463 [2023-11-24 21:41:03,832 INFO L226 Difference]: Without dead ends: 463 [2023-11-24 21:41:03,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:41:03,834 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1322 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:03,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 307 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:41:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-24 21:41:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 393. [2023-11-24 21:41:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 222 states have (on average 1.7027027027027026) internal successors, (378), 337 states have internal predecessors, (378), 40 states have call successors, (40), 19 states have call predecessors, (40), 21 states have return successors, (58), 36 states have call predecessors, (58), 40 states have call successors, (58) [2023-11-24 21:41:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 476 transitions. [2023-11-24 21:41:03,859 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 476 transitions. Word has length 33 [2023-11-24 21:41:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:03,859 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 476 transitions. [2023-11-24 21:41:03,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:41:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 476 transitions. [2023-11-24 21:41:03,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 21:41:03,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:03,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:03,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:41:03,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting system_initializeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:03,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:03,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1758364824, now seen corresponding path program 1 times [2023-11-24 21:41:03,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:03,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429164212] [2023-11-24 21:41:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:03,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:04,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:04,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:04,955 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 21:41:04,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:04,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429164212] [2023-11-24 21:41:04,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429164212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:04,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:04,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:41:04,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717448741] [2023-11-24 21:41:04,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:04,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:41:04,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:41:04,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:41:04,959 INFO L87 Difference]: Start difference. First operand 393 states and 476 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:41:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:06,783 INFO L93 Difference]: Finished difference Result 609 states and 821 transitions. [2023-11-24 21:41:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:41:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-11-24 21:41:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:06,790 INFO L225 Difference]: With dead ends: 609 [2023-11-24 21:41:06,790 INFO L226 Difference]: Without dead ends: 609 [2023-11-24 21:41:06,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:41:06,791 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 628 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:06,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1341 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 21:41:06,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2023-11-24 21:41:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 483. [2023-11-24 21:41:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 290 states have (on average 1.6724137931034482) internal successors, (485), 408 states have internal predecessors, (485), 54 states have call successors, (54), 27 states have call predecessors, (54), 29 states have return successors, (83), 47 states have call predecessors, (83), 54 states have call successors, (83) [2023-11-24 21:41:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 622 transitions. [2023-11-24 21:41:06,825 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 622 transitions. Word has length 34 [2023-11-24 21:41:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:06,826 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 622 transitions. [2023-11-24 21:41:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:41:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 622 transitions. [2023-11-24 21:41:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 21:41:06,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:06,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:06,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:41:06,830 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting system_initializeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:06,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1758364823, now seen corresponding path program 1 times [2023-11-24 21:41:06,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:06,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571426509] [2023-11-24 21:41:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:06,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:08,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:08,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:08,560 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 21:41:08,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:08,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571426509] [2023-11-24 21:41:08,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571426509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:08,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:08,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:41:08,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434443865] [2023-11-24 21:41:08,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:08,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:41:08,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:41:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:41:08,567 INFO L87 Difference]: Start difference. First operand 483 states and 622 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:41:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:10,653 INFO L93 Difference]: Finished difference Result 629 states and 827 transitions. [2023-11-24 21:41:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:41:10,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-11-24 21:41:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:10,659 INFO L225 Difference]: With dead ends: 629 [2023-11-24 21:41:10,659 INFO L226 Difference]: Without dead ends: 629 [2023-11-24 21:41:10,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:41:10,660 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 401 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:10,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1570 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-24 21:41:10,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-11-24 21:41:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 511. [2023-11-24 21:41:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 311 states have (on average 1.6270096463022508) internal successors, (506), 423 states have internal predecessors, (506), 54 states have call successors, (54), 27 states have call predecessors, (54), 36 states have return successors, (108), 60 states have call predecessors, (108), 54 states have call successors, (108) [2023-11-24 21:41:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 668 transitions. [2023-11-24 21:41:10,690 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 668 transitions. Word has length 34 [2023-11-24 21:41:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:10,690 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 668 transitions. [2023-11-24 21:41:10,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:41:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 668 transitions. [2023-11-24 21:41:10,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 21:41:10,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:10,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:10,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:41:10,692 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting system_initializeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:10,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:10,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1866445911, now seen corresponding path program 1 times [2023-11-24 21:41:10,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:10,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284627138] [2023-11-24 21:41:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:10,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:10,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:10,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:10,839 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 21:41:10,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:10,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284627138] [2023-11-24 21:41:10,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284627138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:10,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:10,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:41:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583902367] [2023-11-24 21:41:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:10,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:41:10,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:10,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:41:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:41:10,842 INFO L87 Difference]: Start difference. First operand 511 states and 668 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:11,449 INFO L93 Difference]: Finished difference Result 564 states and 760 transitions. [2023-11-24 21:41:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:41:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-11-24 21:41:11,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:11,455 INFO L225 Difference]: With dead ends: 564 [2023-11-24 21:41:11,455 INFO L226 Difference]: Without dead ends: 564 [2023-11-24 21:41:11,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:41:11,456 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 138 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:11,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 743 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:41:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-11-24 21:41:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 509. [2023-11-24 21:41:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 311 states have (on average 1.6141479099678457) internal successors, (502), 421 states have internal predecessors, (502), 54 states have call successors, (54), 27 states have call predecessors, (54), 36 states have return successors, (108), 60 states have call predecessors, (108), 54 states have call successors, (108) [2023-11-24 21:41:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 664 transitions. [2023-11-24 21:41:11,486 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 664 transitions. Word has length 36 [2023-11-24 21:41:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:11,488 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 664 transitions. [2023-11-24 21:41:11,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 664 transitions. [2023-11-24 21:41:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 21:41:11,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:11,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:11,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:41:11,490 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting system_initializeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:11,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1866445910, now seen corresponding path program 1 times [2023-11-24 21:41:11,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:11,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51351357] [2023-11-24 21:41:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:11,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:11,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:11,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:11,683 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 21:41:11,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:11,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51351357] [2023-11-24 21:41:11,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51351357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:11,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:11,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:41:11,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180493303] [2023-11-24 21:41:11,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:11,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:41:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:41:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:41:11,686 INFO L87 Difference]: Start difference. First operand 509 states and 664 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:12,256 INFO L93 Difference]: Finished difference Result 562 states and 756 transitions. [2023-11-24 21:41:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:41:12,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-11-24 21:41:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:12,263 INFO L225 Difference]: With dead ends: 562 [2023-11-24 21:41:12,263 INFO L226 Difference]: Without dead ends: 562 [2023-11-24 21:41:12,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:41:12,264 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 263 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:12,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 629 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:41:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-11-24 21:41:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 507. [2023-11-24 21:41:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 311 states have (on average 1.6012861736334405) internal successors, (498), 419 states have internal predecessors, (498), 54 states have call successors, (54), 27 states have call predecessors, (54), 36 states have return successors, (108), 60 states have call predecessors, (108), 54 states have call successors, (108) [2023-11-24 21:41:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 660 transitions. [2023-11-24 21:41:12,299 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 660 transitions. Word has length 36 [2023-11-24 21:41:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:12,299 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 660 transitions. [2023-11-24 21:41:12,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 660 transitions. [2023-11-24 21:41:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:41:12,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:12,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:12,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:41:12,301 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ASNullErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:12,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1326446247, now seen corresponding path program 1 times [2023-11-24 21:41:12,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:12,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005825145] [2023-11-24 21:41:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:12,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:12,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:12,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:12,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005825145] [2023-11-24 21:41:12,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005825145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:12,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:12,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:41:12,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136593950] [2023-11-24 21:41:12,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:41:12,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:41:12,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:41:12,583 INFO L87 Difference]: Start difference. First operand 507 states and 660 transitions. Second operand has 9 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:13,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:13,706 INFO L93 Difference]: Finished difference Result 627 states and 877 transitions. [2023-11-24 21:41:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:41:13,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-11-24 21:41:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:13,714 INFO L225 Difference]: With dead ends: 627 [2023-11-24 21:41:13,714 INFO L226 Difference]: Without dead ends: 627 [2023-11-24 21:41:13,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:41:13,716 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 353 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:13,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1370 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:41:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2023-11-24 21:41:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 547. [2023-11-24 21:41:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 343 states have (on average 1.5918367346938775) internal successors, (546), 453 states have internal predecessors, (546), 56 states have call successors, (56), 31 states have call predecessors, (56), 42 states have return successors, (121), 62 states have call predecessors, (121), 56 states have call successors, (121) [2023-11-24 21:41:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 723 transitions. [2023-11-24 21:41:13,749 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 723 transitions. Word has length 44 [2023-11-24 21:41:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:13,750 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 723 transitions. [2023-11-24 21:41:13,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 723 transitions. [2023-11-24 21:41:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:41:13,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:13,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:13,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:41:13,752 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ASNullErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:13,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1326446246, now seen corresponding path program 1 times [2023-11-24 21:41:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:13,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560758022] [2023-11-24 21:41:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:13,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:14,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:14,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:14,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560758022] [2023-11-24 21:41:14,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560758022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:14,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:14,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:41:14,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29198342] [2023-11-24 21:41:14,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:14,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:41:14,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:14,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:41:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:41:14,106 INFO L87 Difference]: Start difference. First operand 547 states and 723 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:15,275 INFO L93 Difference]: Finished difference Result 674 states and 915 transitions. [2023-11-24 21:41:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:41:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-11-24 21:41:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:15,283 INFO L225 Difference]: With dead ends: 674 [2023-11-24 21:41:15,283 INFO L226 Difference]: Without dead ends: 674 [2023-11-24 21:41:15,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:41:15,284 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 441 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:15,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1926 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:41:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-11-24 21:41:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 620. [2023-11-24 21:41:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 399 states have (on average 1.506265664160401) internal successors, (601), 500 states have internal predecessors, (601), 58 states have call successors, (58), 33 states have call predecessors, (58), 57 states have return successors, (191), 86 states have call predecessors, (191), 58 states have call successors, (191) [2023-11-24 21:41:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 850 transitions. [2023-11-24 21:41:15,326 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 850 transitions. Word has length 44 [2023-11-24 21:41:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:15,327 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 850 transitions. [2023-11-24 21:41:15,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 850 transitions. [2023-11-24 21:41:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 21:41:15,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:15,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:15,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:41:15,329 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:15,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1827046577, now seen corresponding path program 1 times [2023-11-24 21:41:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:15,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193886235] [2023-11-24 21:41:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:15,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:15,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:15,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:15,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193886235] [2023-11-24 21:41:15,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193886235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:15,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:15,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:41:15,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111596799] [2023-11-24 21:41:15,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:15,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:41:15,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:41:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:41:15,579 INFO L87 Difference]: Start difference. First operand 620 states and 850 transitions. Second operand has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:16,825 INFO L93 Difference]: Finished difference Result 737 states and 1039 transitions. [2023-11-24 21:41:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:41:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-11-24 21:41:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:16,834 INFO L225 Difference]: With dead ends: 737 [2023-11-24 21:41:16,834 INFO L226 Difference]: Without dead ends: 737 [2023-11-24 21:41:16,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:41:16,836 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 328 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:16,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 1374 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:41:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2023-11-24 21:41:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 638. [2023-11-24 21:41:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 413 states have (on average 1.5060532687651331) internal successors, (622), 514 states have internal predecessors, (622), 60 states have call successors, (60), 35 states have call predecessors, (60), 59 states have return successors, (196), 88 states have call predecessors, (196), 60 states have call successors, (196) [2023-11-24 21:41:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 878 transitions. [2023-11-24 21:41:16,878 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 878 transitions. Word has length 45 [2023-11-24 21:41:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:16,879 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 878 transitions. [2023-11-24 21:41:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 878 transitions. [2023-11-24 21:41:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 21:41:16,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:16,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:16,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:41:16,881 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:16,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1827046578, now seen corresponding path program 1 times [2023-11-24 21:41:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:16,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125824877] [2023-11-24 21:41:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:17,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:17,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:17,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:17,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125824877] [2023-11-24 21:41:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125824877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:17,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:17,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:41:17,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014494038] [2023-11-24 21:41:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:17,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:41:17,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:41:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:41:17,343 INFO L87 Difference]: Start difference. First operand 638 states and 878 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:18,485 INFO L93 Difference]: Finished difference Result 678 states and 945 transitions. [2023-11-24 21:41:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:41:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-11-24 21:41:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:18,492 INFO L225 Difference]: With dead ends: 678 [2023-11-24 21:41:18,493 INFO L226 Difference]: Without dead ends: 678 [2023-11-24 21:41:18,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:41:18,495 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 349 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:18,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1388 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:41:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2023-11-24 21:41:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 638. [2023-11-24 21:41:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 413 states have (on average 1.4987893462469735) internal successors, (619), 514 states have internal predecessors, (619), 60 states have call successors, (60), 35 states have call predecessors, (60), 59 states have return successors, (196), 88 states have call predecessors, (196), 60 states have call successors, (196) [2023-11-24 21:41:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 875 transitions. [2023-11-24 21:41:18,533 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 875 transitions. Word has length 45 [2023-11-24 21:41:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:18,533 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 875 transitions. [2023-11-24 21:41:18,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 21:41:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 875 transitions. [2023-11-24 21:41:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:41:18,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:18,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:18,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 21:41:18,535 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:18,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 858378320, now seen corresponding path program 1 times [2023-11-24 21:41:18,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:18,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588141315] [2023-11-24 21:41:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:18,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:18,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-24 21:41:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:41:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588141315] [2023-11-24 21:41:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588141315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:18,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:18,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:41:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159066354] [2023-11-24 21:41:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:18,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:41:18,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:41:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:41:18,986 INFO L87 Difference]: Start difference. First operand 638 states and 875 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:41:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:19,971 INFO L93 Difference]: Finished difference Result 831 states and 1190 transitions. [2023-11-24 21:41:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:41:19,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-11-24 21:41:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:19,980 INFO L225 Difference]: With dead ends: 831 [2023-11-24 21:41:19,980 INFO L226 Difference]: Without dead ends: 831 [2023-11-24 21:41:19,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:41:19,981 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 237 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:19,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2362 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:41:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2023-11-24 21:41:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 745. [2023-11-24 21:41:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 502 states have (on average 1.4741035856573705) internal successors, (740), 604 states have internal predecessors, (740), 68 states have call successors, (68), 47 states have call predecessors, (68), 69 states have return successors, (223), 93 states have call predecessors, (223), 68 states have call successors, (223) [2023-11-24 21:41:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1031 transitions. [2023-11-24 21:41:20,025 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1031 transitions. Word has length 51 [2023-11-24 21:41:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:20,025 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1031 transitions. [2023-11-24 21:41:20,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:41:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1031 transitions. [2023-11-24 21:41:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:41:20,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:20,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:20,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 21:41:20,027 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:20,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash 777288624, now seen corresponding path program 1 times [2023-11-24 21:41:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:20,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949630368] [2023-11-24 21:41:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:20,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:41:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:41:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:20,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-24 21:41:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:41:20,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949630368] [2023-11-24 21:41:20,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949630368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:20,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:20,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:41:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067372397] [2023-11-24 21:41:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:41:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:41:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:41:20,192 INFO L87 Difference]: Start difference. First operand 745 states and 1031 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:41:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:20,922 INFO L93 Difference]: Finished difference Result 766 states and 1073 transitions. [2023-11-24 21:41:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:41:20,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-11-24 21:41:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:20,929 INFO L225 Difference]: With dead ends: 766 [2023-11-24 21:41:20,929 INFO L226 Difference]: Without dead ends: 766 [2023-11-24 21:41:20,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:41:20,931 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 162 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:20,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 880 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:41:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2023-11-24 21:41:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 743. [2023-11-24 21:41:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 502 states have (on average 1.4701195219123506) internal successors, (738), 602 states have internal predecessors, (738), 68 states have call successors, (68), 47 states have call predecessors, (68), 69 states have return successors, (223), 93 states have call predecessors, (223), 68 states have call successors, (223) [2023-11-24 21:41:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1029 transitions. [2023-11-24 21:41:20,984 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1029 transitions. Word has length 51 [2023-11-24 21:41:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:20,985 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1029 transitions. [2023-11-24 21:41:20,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:41:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1029 transitions. [2023-11-24 21:41:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:41:20,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:20,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:20,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 21:41:20,987 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ASStartErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ASStartErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ASStartErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 159 more)] === [2023-11-24 21:41:20,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:20,988 INFO L85 PathProgramCache]: Analyzing trace with hash 777288625, now seen corresponding path program 1 times [2023-11-24 21:41:20,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:20,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676003472] [2023-11-24 21:41:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:20,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat