/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.trace.refinement.strategy FOX -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-17387ad-m [2024-11-06 14:20:32,374 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 14:20:32,466 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-06 14:20:32,473 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 14:20:32,473 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 14:20:32,492 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 14:20:32,493 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 14:20:32,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 14:20:32,494 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 14:20:32,494 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 14:20:32,495 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 14:20:32,495 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 14:20:32,496 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 14:20:32,496 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 14:20:32,496 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 14:20:32,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 14:20:32,497 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 14:20:32,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 14:20:32,497 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 14:20:32,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 14:20:32,498 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 14:20:32,499 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-06 14:20:32,499 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-06 14:20:32,499 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 14:20:32,499 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-06 14:20:32,500 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 14:20:32,500 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 14:20:32,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 14:20:32,500 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 14:20:32,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 14:20:32,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 14:20:32,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 14:20:32,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 14:20:32,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 14:20:32,502 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 14:20:32,502 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-06 14:20:32,503 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-06 14:20:32,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 14:20:32,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 14:20:32,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 14:20:32,504 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 14:20:32,506 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX [2024-11-06 14:20:32,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 14:20:32,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 14:20:32,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 14:20:32,805 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 14:20:32,805 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 14:20:32,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i [2024-11-06 14:20:34,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 14:20:34,767 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 14:20:34,769 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i [2024-11-06 14:20:34,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd4ca0913/6b8dc39c96c249babf330ff80c26aa01/FLAG8a9d97b7d [2024-11-06 14:20:34,815 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd4ca0913/6b8dc39c96c249babf330ff80c26aa01 [2024-11-06 14:20:34,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 14:20:34,819 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-06 14:20:34,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 14:20:34,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 14:20:34,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 14:20:34,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:20:34" (1/1) ... [2024-11-06 14:20:34,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1421a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:34, skipping insertion in model container [2024-11-06 14:20:34,828 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:20:34" (1/1) ... [2024-11-06 14:20:34,917 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 14:20:35,275 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2024-11-06 14:20:35,287 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2024-11-06 14:20:36,287 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,427 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,427 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,428 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,441 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,444 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,445 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,445 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,446 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,446 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,448 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,452 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,452 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,455 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,455 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,465 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,465 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,466 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,466 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,468 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,468 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,469 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,469 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,471 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,472 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,472 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,472 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,473 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,473 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:36,843 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,844 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,845 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,845 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,952 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:36,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 14:20:36,992 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-06 14:20:37,021 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 14:20:37,026 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2024-11-06 14:20:37,027 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2024-11-06 14:20:37,056 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,067 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,068 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,069 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,074 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,075 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,075 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,075 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,076 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,076 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,076 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,078 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,078 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,079 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,080 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,083 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,084 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,084 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,084 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,085 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,085 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,085 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,086 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,086 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,087 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,087 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,087 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,088 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,088 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,148 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,148 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,149 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,149 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,181 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:20:37,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 14:20:37,194 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 14:20:37,212 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2024-11-06 14:20:37,212 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2024-11-06 14:20:37,253 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,253 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,253 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,254 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,254 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,260 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,260 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,262 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,263 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,263 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,264 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,264 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,265 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:20:37,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 14:20:37,543 WARN L710 CHandler]: The following functions are not defined or handled internally: aws_array_list_ensure_capacity [2024-11-06 14:20:37,550 INFO L204 MainTranslator]: Completed translation [2024-11-06 14:20:37,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37 WrapperNode [2024-11-06 14:20:37,551 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 14:20:37,552 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 14:20:37,552 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 14:20:37,552 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 14:20:37,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,629 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,676 INFO L138 Inliner]: procedures = 687, calls = 1038, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 138 [2024-11-06 14:20:37,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 14:20:37,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 14:20:37,677 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 14:20:37,677 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 14:20:37,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,693 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,710 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 14, 5]. 67 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 6 writes are split as follows [0, 6, 0]. [2024-11-06 14:20:37,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,748 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 14:20:37,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 14:20:37,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 14:20:37,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 14:20:37,761 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (1/1) ... [2024-11-06 14:20:37,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 14:20:37,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:37,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-06 14:20:37,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-06 14:20:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-06 14:20:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-06 14:20:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-06 14:20:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-06 14:20:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-06 14:20:37,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-06 14:20:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-06 14:20:37,820 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-06 14:20:37,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-06 14:20:37,820 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2024-11-06 14:20:37,820 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2024-11-06 14:20:37,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 14:20:37,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-06 14:20:37,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-06 14:20:37,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-06 14:20:37,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 14:20:37,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 14:20:37,822 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-06 14:20:37,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-06 14:20:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-06 14:20:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-06 14:20:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-06 14:20:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-06 14:20:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-06 14:20:37,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-06 14:20:37,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-06 14:20:37,824 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-11-06 14:20:37,824 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-11-06 14:20:38,080 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 14:20:38,083 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 14:20:38,443 INFO L? ?]: Removed 54 outVars from TransFormulas that were not future-live. [2024-11-06 14:20:38,443 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 14:20:38,455 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 14:20:38,455 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-06 14:20:38,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:20:38 BoogieIcfgContainer [2024-11-06 14:20:38,458 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 14:20:38,461 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 14:20:38,461 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 14:20:38,464 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 14:20:38,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:20:34" (1/3) ... [2024-11-06 14:20:38,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6e27ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:20:38, skipping insertion in model container [2024-11-06 14:20:38,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:20:37" (2/3) ... [2024-11-06 14:20:38,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6e27ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:20:38, skipping insertion in model container [2024-11-06 14:20:38,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:20:38" (3/3) ... [2024-11-06 14:20:38,466 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2024-11-06 14:20:38,481 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 14:20:38,482 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 14:20:38,546 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 14:20:38,554 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@8497590, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 14:20:38,555 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 14:20:38,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-06 14:20:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-06 14:20:38,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:38,569 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:20:38,569 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:38,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2024-11-06 14:20:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77442908] [2024-11-06 14:20:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:38,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:38,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:38,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:38,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-06 14:20:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:38,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-06 14:20:38,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-06 14:20:38,831 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:38,832 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77442908] [2024-11-06 14:20:38,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77442908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:38,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:38,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-06 14:20:38,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84971760] [2024-11-06 14:20:38,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:38,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-06 14:20:38,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:38,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-06 14:20:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 14:20:38,863 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-06 14:20:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:38,885 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2024-11-06 14:20:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-06 14:20:38,887 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2024-11-06 14:20:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:38,892 INFO L225 Difference]: With dead ends: 128 [2024-11-06 14:20:38,892 INFO L226 Difference]: Without dead ends: 63 [2024-11-06 14:20:38,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 14:20:38,898 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:38,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:20:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-06 14:20:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-06 14:20:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-06 14:20:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2024-11-06 14:20:38,931 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2024-11-06 14:20:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:38,932 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2024-11-06 14:20:38,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-06 14:20:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2024-11-06 14:20:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-06 14:20:38,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:38,935 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:20:38,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-06 14:20:39,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:39,136 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:39,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2024-11-06 14:20:39,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:39,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373529246] [2024-11-06 14:20:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:39,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:39,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:39,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:39,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-06 14:20:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:39,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-06 14:20:39,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-06 14:20:39,430 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:39,433 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:39,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373529246] [2024-11-06 14:20:39,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373529246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:39,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:39,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-06 14:20:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010915308] [2024-11-06 14:20:39,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:39,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 14:20:39,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 14:20:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-06 14:20:39,437 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-06 14:20:39,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:39,516 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2024-11-06 14:20:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 14:20:39,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2024-11-06 14:20:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:39,519 INFO L225 Difference]: With dead ends: 114 [2024-11-06 14:20:39,519 INFO L226 Difference]: Without dead ends: 65 [2024-11-06 14:20:39,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-06 14:20:39,523 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:39,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 377 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 14:20:39,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-06 14:20:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-06 14:20:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-06 14:20:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2024-11-06 14:20:39,541 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 68 [2024-11-06 14:20:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:39,542 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2024-11-06 14:20:39,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-06 14:20:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2024-11-06 14:20:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-06 14:20:39,544 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:39,544 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:20:39,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-06 14:20:39,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:39,745 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:39,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2024-11-06 14:20:39,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:39,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428426848] [2024-11-06 14:20:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:39,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:39,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:39,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-06 14:20:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:39,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-06 14:20:39,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-06 14:20:40,039 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:40,039 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:40,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428426848] [2024-11-06 14:20:40,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428426848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:40,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:40,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-06 14:20:40,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890829230] [2024-11-06 14:20:40,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:40,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 14:20:40,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:40,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 14:20:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-06 14:20:40,042 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-06 14:20:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:40,192 INFO L93 Difference]: Finished difference Result 121 states and 163 transitions. [2024-11-06 14:20:40,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 14:20:40,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2024-11-06 14:20:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:40,194 INFO L225 Difference]: With dead ends: 121 [2024-11-06 14:20:40,195 INFO L226 Difference]: Without dead ends: 70 [2024-11-06 14:20:40,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-06 14:20:40,199 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 20 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:40,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 300 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 14:20:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-06 14:20:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-11-06 14:20:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 50 states have internal predecessors, (60), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-06 14:20:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2024-11-06 14:20:40,213 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 70 [2024-11-06 14:20:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:40,213 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2024-11-06 14:20:40,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-06 14:20:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2024-11-06 14:20:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-06 14:20:40,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:40,215 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-06 14:20:40,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-06 14:20:40,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:40,420 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:40,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2024-11-06 14:20:40,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:40,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3760598] [2024-11-06 14:20:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:40,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:40,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-06 14:20:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:40,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 14:20:40,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-06 14:20:40,709 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:40,711 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:40,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3760598] [2024-11-06 14:20:40,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3760598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:40,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-06 14:20:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763632742] [2024-11-06 14:20:40,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:40,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-06 14:20:40,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-06 14:20:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-06 14:20:40,714 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-06 14:20:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:40,928 INFO L93 Difference]: Finished difference Result 133 states and 181 transitions. [2024-11-06 14:20:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-06 14:20:40,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2024-11-06 14:20:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:40,930 INFO L225 Difference]: With dead ends: 133 [2024-11-06 14:20:40,930 INFO L226 Difference]: Without dead ends: 79 [2024-11-06 14:20:40,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-06 14:20:40,932 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 29 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:40,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 354 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 14:20:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-06 14:20:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2024-11-06 14:20:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-06 14:20:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2024-11-06 14:20:40,951 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 72 [2024-11-06 14:20:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:40,952 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2024-11-06 14:20:40,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-06 14:20:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2024-11-06 14:20:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-06 14:20:40,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:40,953 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-06 14:20:40,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-06 14:20:41,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:41,156 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:41,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2024-11-06 14:20:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:41,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731197821] [2024-11-06 14:20:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:41,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:41,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:41,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:41,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-06 14:20:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:41,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-06 14:20:41,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-06 14:20:41,353 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:41,354 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:41,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731197821] [2024-11-06 14:20:41,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731197821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:41,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:41,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-06 14:20:41,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718526946] [2024-11-06 14:20:41,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:41,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-06 14:20:41,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-06 14:20:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-06 14:20:41,356 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-06 14:20:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:41,392 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2024-11-06 14:20:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-06 14:20:41,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2024-11-06 14:20:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:41,395 INFO L225 Difference]: With dead ends: 130 [2024-11-06 14:20:41,395 INFO L226 Difference]: Without dead ends: 74 [2024-11-06 14:20:41,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-06 14:20:41,396 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:41,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 152 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:20:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-06 14:20:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2024-11-06 14:20:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-06 14:20:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-11-06 14:20:41,405 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 73 [2024-11-06 14:20:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:41,405 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-11-06 14:20:41,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-06 14:20:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-11-06 14:20:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-06 14:20:41,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:41,408 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-06 14:20:41,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-06 14:20:41,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:41,615 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:41,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2024-11-06 14:20:41,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:41,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392655275] [2024-11-06 14:20:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:41,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:41,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:41,619 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:41,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-06 14:20:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:41,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-06 14:20:41,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-06 14:20:41,866 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:41,866 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:41,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392655275] [2024-11-06 14:20:41,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392655275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:41,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:41,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-06 14:20:41,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290976938] [2024-11-06 14:20:41,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:41,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 14:20:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 14:20:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-06 14:20:41,868 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-06 14:20:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:41,908 INFO L93 Difference]: Finished difference Result 121 states and 161 transitions. [2024-11-06 14:20:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 14:20:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2024-11-06 14:20:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:41,910 INFO L225 Difference]: With dead ends: 121 [2024-11-06 14:20:41,910 INFO L226 Difference]: Without dead ends: 71 [2024-11-06 14:20:41,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-06 14:20:41,911 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:41,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 376 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:20:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-06 14:20:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-06 14:20:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-06 14:20:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2024-11-06 14:20:41,924 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 81 [2024-11-06 14:20:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:41,924 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2024-11-06 14:20:41,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-06 14:20:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2024-11-06 14:20:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-06 14:20:41,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:41,926 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-06 14:20:41,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-06 14:20:42,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:42,133 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:42,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1338639547, now seen corresponding path program 1 times [2024-11-06 14:20:42,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312623730] [2024-11-06 14:20:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:42,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:42,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:42,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-06 14:20:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:42,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-06 14:20:42,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-06 14:20:42,414 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:42,414 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:42,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312623730] [2024-11-06 14:20:42,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312623730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:42,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:42,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-06 14:20:42,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788122422] [2024-11-06 14:20:42,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:42,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-06 14:20:42,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-06 14:20:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-06 14:20:42,416 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 14:20:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:42,549 INFO L93 Difference]: Finished difference Result 130 states and 169 transitions. [2024-11-06 14:20:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-06 14:20:42,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2024-11-06 14:20:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:42,551 INFO L225 Difference]: With dead ends: 130 [2024-11-06 14:20:42,551 INFO L226 Difference]: Without dead ends: 73 [2024-11-06 14:20:42,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-06 14:20:42,552 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 23 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:42,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 364 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 14:20:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-06 14:20:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-11-06 14:20:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.26) internal successors, (63), 53 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-06 14:20:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-11-06 14:20:42,564 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 83 [2024-11-06 14:20:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:42,565 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-11-06 14:20:42,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 14:20:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-11-06 14:20:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-06 14:20:42,567 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:42,567 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-06 14:20:42,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-06 14:20:42,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:42,768 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:42,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1040869362, now seen corresponding path program 1 times [2024-11-06 14:20:42,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:42,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476599059] [2024-11-06 14:20:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:42,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:42,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:42,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-06 14:20:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:42,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-06 14:20:42,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-06 14:20:43,039 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:43,039 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476599059] [2024-11-06 14:20:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476599059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:43,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:43,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-06 14:20:43,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136143645] [2024-11-06 14:20:43,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:43,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-06 14:20:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-06 14:20:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-06 14:20:43,042 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 14:20:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:43,228 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2024-11-06 14:20:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-06 14:20:43,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 85 [2024-11-06 14:20:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:43,230 INFO L225 Difference]: With dead ends: 130 [2024-11-06 14:20:43,230 INFO L226 Difference]: Without dead ends: 72 [2024-11-06 14:20:43,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-06 14:20:43,231 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 32 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:43,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 410 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 14:20:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-06 14:20:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-11-06 14:20:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 49 states have internal predecessors, (59), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-06 14:20:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2024-11-06 14:20:43,238 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 85 [2024-11-06 14:20:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:43,238 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2024-11-06 14:20:43,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 14:20:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2024-11-06 14:20:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-06 14:20:43,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:43,240 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-06 14:20:43,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-06 14:20:43,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:43,440 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:43,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1678268318, now seen corresponding path program 2 times [2024-11-06 14:20:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:43,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085293874] [2024-11-06 14:20:43,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 14:20:43,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:43,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:43,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:43,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-06 14:20:43,629 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 14:20:43,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 14:20:43,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-06 14:20:43,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-06 14:20:43,678 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:43,678 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:43,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085293874] [2024-11-06 14:20:43,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085293874] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:43,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:43,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-06 14:20:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41761561] [2024-11-06 14:20:43,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:43,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-06 14:20:43,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-06 14:20:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-06 14:20:43,680 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-06 14:20:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:43,731 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2024-11-06 14:20:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-06 14:20:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2024-11-06 14:20:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:43,732 INFO L225 Difference]: With dead ends: 123 [2024-11-06 14:20:43,732 INFO L226 Difference]: Without dead ends: 70 [2024-11-06 14:20:43,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-06 14:20:43,734 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:43,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 441 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:20:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-06 14:20:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-06 14:20:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-06 14:20:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2024-11-06 14:20:43,745 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 94 [2024-11-06 14:20:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:43,746 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2024-11-06 14:20:43,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-06 14:20:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2024-11-06 14:20:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-06 14:20:43,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:43,747 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2024-11-06 14:20:43,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-06 14:20:43,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:43,948 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:43,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1005701739, now seen corresponding path program 1 times [2024-11-06 14:20:43,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:43,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864224266] [2024-11-06 14:20:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:43,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:43,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:43,951 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:43,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-06 14:20:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:44,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-06 14:20:44,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-06 14:20:44,179 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:44,179 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864224266] [2024-11-06 14:20:44,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864224266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:44,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:44,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-06 14:20:44,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965748612] [2024-11-06 14:20:44,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:44,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-06 14:20:44,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:44,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-06 14:20:44,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-06 14:20:44,181 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-06 14:20:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:44,230 INFO L93 Difference]: Finished difference Result 119 states and 156 transitions. [2024-11-06 14:20:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-06 14:20:44,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 96 [2024-11-06 14:20:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:44,231 INFO L225 Difference]: With dead ends: 119 [2024-11-06 14:20:44,232 INFO L226 Difference]: Without dead ends: 70 [2024-11-06 14:20:44,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-06 14:20:44,232 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:44,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 440 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:20:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-06 14:20:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-11-06 14:20:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 50 states have internal predecessors, (60), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-06 14:20:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2024-11-06 14:20:44,268 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 96 [2024-11-06 14:20:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:44,269 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2024-11-06 14:20:44,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-06 14:20:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2024-11-06 14:20:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-06 14:20:44,270 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:44,270 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-06 14:20:44,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-06 14:20:44,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:44,471 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:44,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:44,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1128444350, now seen corresponding path program 1 times [2024-11-06 14:20:44,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:44,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690875582] [2024-11-06 14:20:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:44,474 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:44,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-06 14:20:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:44,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-06 14:20:44,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:44,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-06 14:20:44,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-06 14:20:49,176 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$#1.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) (_ bv0 64))))) is different from true [2024-11-06 14:20:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-06 14:20:49,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:20:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-06 14:20:49,853 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:49,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690875582] [2024-11-06 14:20:49,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690875582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:20:49,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:20:49,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2024-11-06 14:20:49,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2598321] [2024-11-06 14:20:49,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:20:49,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-06 14:20:49,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-06 14:20:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2024-11-06 14:20:49,856 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-06 14:20:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:50,766 INFO L93 Difference]: Finished difference Result 166 states and 228 transitions. [2024-11-06 14:20:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-06 14:20:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 98 [2024-11-06 14:20:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:50,771 INFO L225 Difference]: With dead ends: 166 [2024-11-06 14:20:50,771 INFO L226 Difference]: Without dead ends: 112 [2024-11-06 14:20:50,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=76, Invalid=347, Unknown=1, NotChecked=38, Total=462 [2024-11-06 14:20:50,774 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 60 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:50,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 635 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 312 Invalid, 1 Unknown, 268 Unchecked, 0.7s Time] [2024-11-06 14:20:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-06 14:20:50,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2024-11-06 14:20:50,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.28125) internal successors, (82), 66 states have internal predecessors, (82), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-06 14:20:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2024-11-06 14:20:50,791 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 98 [2024-11-06 14:20:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:50,791 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2024-11-06 14:20:50,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-06 14:20:50,792 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2024-11-06 14:20:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-06 14:20:50,793 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:50,793 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-06 14:20:50,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-06 14:20:50,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:50,993 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:50,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:50,994 INFO L85 PathProgramCache]: Analyzing trace with hash 604075650, now seen corresponding path program 1 times [2024-11-06 14:20:50,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:50,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887246098] [2024-11-06 14:20:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:50,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:50,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:50,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-06 14:20:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:51,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-06 14:20:51,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-06 14:20:51,173 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:51,174 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:51,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887246098] [2024-11-06 14:20:51,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887246098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:51,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:51,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-06 14:20:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661815486] [2024-11-06 14:20:51,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:51,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-06 14:20:51,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:51,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-06 14:20:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 14:20:51,175 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-06 14:20:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:51,222 INFO L93 Difference]: Finished difference Result 159 states and 214 transitions. [2024-11-06 14:20:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-06 14:20:51,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 98 [2024-11-06 14:20:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:51,224 INFO L225 Difference]: With dead ends: 159 [2024-11-06 14:20:51,224 INFO L226 Difference]: Without dead ends: 87 [2024-11-06 14:20:51,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 14:20:51,225 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:51,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 231 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:20:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-06 14:20:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-11-06 14:20:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.265625) internal successors, (81), 66 states have internal predecessors, (81), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-06 14:20:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2024-11-06 14:20:51,233 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 98 [2024-11-06 14:20:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:51,234 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2024-11-06 14:20:51,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-06 14:20:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2024-11-06 14:20:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-06 14:20:51,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:51,235 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-06 14:20:51,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-06 14:20:51,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:51,436 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:51,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1924312770, now seen corresponding path program 1 times [2024-11-06 14:20:51,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:51,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446537919] [2024-11-06 14:20:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:51,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:51,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:51,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:51,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-06 14:20:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:51,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-06 14:20:51,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-06 14:20:51,603 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:20:51,603 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446537919] [2024-11-06 14:20:51,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446537919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:20:51,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:20:51,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-06 14:20:51,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145988722] [2024-11-06 14:20:51,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:20:51,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-06 14:20:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:51,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-06 14:20:51,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 14:20:51,605 INFO L87 Difference]: Start difference. First operand 86 states and 111 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-06 14:20:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:20:51,628 INFO L93 Difference]: Finished difference Result 158 states and 213 transitions. [2024-11-06 14:20:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-06 14:20:51,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 98 [2024-11-06 14:20:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:20:51,630 INFO L225 Difference]: With dead ends: 158 [2024-11-06 14:20:51,630 INFO L226 Difference]: Without dead ends: 86 [2024-11-06 14:20:51,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 14:20:51,631 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:20:51,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 232 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:20:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-06 14:20:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2024-11-06 14:20:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-06 14:20:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2024-11-06 14:20:51,638 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 98 [2024-11-06 14:20:51,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:20:51,639 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2024-11-06 14:20:51,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-06 14:20:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2024-11-06 14:20:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-06 14:20:51,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:20:51,640 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-06 14:20:51,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-06 14:20:51,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:51,841 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:20:51,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:20:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1438193982, now seen corresponding path program 1 times [2024-11-06 14:20:51,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:20:51,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105494334] [2024-11-06 14:20:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:20:51,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:20:51,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:20:51,843 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:20:51,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-06 14:20:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:20:52,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-06 14:20:52,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:20:52,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-06 14:20:52,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-06 14:20:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-06 14:20:53,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:20:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-06 14:20:54,145 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:20:54,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105494334] [2024-11-06 14:20:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105494334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:20:54,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:20:54,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2024-11-06 14:20:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564658252] [2024-11-06 14:20:54,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:20:54,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-06 14:20:54,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:20:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-06 14:20:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-06 14:20:54,148 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 21 states, 21 states have (on average 6.0) internal successors, (126), 19 states have internal predecessors, (126), 10 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-06 14:20:58,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:21:02,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:21:06,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:21:10,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:21:14,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:21:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:21:16,023 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2024-11-06 14:21:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-06 14:21:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 19 states have internal predecessors, (126), 10 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 100 [2024-11-06 14:21:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:21:16,025 INFO L225 Difference]: With dead ends: 199 [2024-11-06 14:21:16,025 INFO L226 Difference]: Without dead ends: 128 [2024-11-06 14:21:16,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2024-11-06 14:21:16,027 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 101 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 47 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2024-11-06 14:21:16,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 707 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 392 Invalid, 4 Unknown, 0 Unchecked, 21.4s Time] [2024-11-06 14:21:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-06 14:21:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-11-06 14:21:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 16 states have call successors, (16), 10 states have call predecessors, (16), 11 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2024-11-06 14:21:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 152 transitions. [2024-11-06 14:21:16,044 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 152 transitions. Word has length 100 [2024-11-06 14:21:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:21:16,045 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 152 transitions. [2024-11-06 14:21:16,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 19 states have internal predecessors, (126), 10 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-06 14:21:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 152 transitions. [2024-11-06 14:21:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-06 14:21:16,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:21:16,047 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-06 14:21:16,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-06 14:21:16,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:16,247 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:21:16,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:21:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2047426688, now seen corresponding path program 1 times [2024-11-06 14:21:16,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:21:16,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546190032] [2024-11-06 14:21:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:21:16,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:16,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:21:16,251 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:21:16,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-06 14:21:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:21:16,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-06 14:21:16,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:21:16,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-06 14:21:16,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-06 14:21:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-06 14:21:17,987 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:21:17,987 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:21:17,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546190032] [2024-11-06 14:21:17,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546190032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:21:17,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:21:17,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-06 14:21:17,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891645003] [2024-11-06 14:21:17,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:21:17,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-06 14:21:17,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:21:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-06 14:21:17,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-06 14:21:17,988 INFO L87 Difference]: Start difference. First operand 124 states and 152 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 14:21:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:21:19,684 INFO L93 Difference]: Finished difference Result 298 states and 371 transitions. [2024-11-06 14:21:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-06 14:21:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 100 [2024-11-06 14:21:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:21:19,686 INFO L225 Difference]: With dead ends: 298 [2024-11-06 14:21:19,686 INFO L226 Difference]: Without dead ends: 236 [2024-11-06 14:21:19,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-06 14:21:19,687 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 46 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-06 14:21:19,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 398 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-06 14:21:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-06 14:21:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2024-11-06 14:21:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 181 states have (on average 1.2265193370165746) internal successors, (222), 185 states have internal predecessors, (222), 30 states have call successors, (30), 18 states have call predecessors, (30), 20 states have return successors, (36), 28 states have call predecessors, (36), 28 states have call successors, (36) [2024-11-06 14:21:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 288 transitions. [2024-11-06 14:21:19,722 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 288 transitions. Word has length 100 [2024-11-06 14:21:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:21:19,722 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 288 transitions. [2024-11-06 14:21:19,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 14:21:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 288 transitions. [2024-11-06 14:21:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-06 14:21:19,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:21:19,725 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-06 14:21:19,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-06 14:21:19,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:19,926 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:21:19,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:21:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1654399678, now seen corresponding path program 1 times [2024-11-06 14:21:19,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:21:19,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550713121] [2024-11-06 14:21:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:21:19,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:19,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:21:19,929 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:21:19,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-06 14:21:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:21:20,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-06 14:21:20,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:21:20,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-06 14:21:20,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-06 14:21:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-06 14:21:23,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:21:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-06 14:21:24,420 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:21:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550713121] [2024-11-06 14:21:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550713121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:21:24,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:21:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2024-11-06 14:21:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877409557] [2024-11-06 14:21:24,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:21:24,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-06 14:21:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:21:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-06 14:21:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-11-06 14:21:24,422 INFO L87 Difference]: Start difference. First operand 232 states and 288 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 23 states have internal predecessors, (123), 10 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-06 14:21:28,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:21:32,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:21:36,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:21:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:21:39,765 INFO L93 Difference]: Finished difference Result 352 states and 444 transitions. [2024-11-06 14:21:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-06 14:21:39,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 23 states have internal predecessors, (123), 10 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 100 [2024-11-06 14:21:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:21:39,767 INFO L225 Difference]: With dead ends: 352 [2024-11-06 14:21:39,767 INFO L226 Difference]: Without dead ends: 236 [2024-11-06 14:21:39,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 170 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2024-11-06 14:21:39,768 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 74 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 45 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2024-11-06 14:21:39,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 963 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 659 Invalid, 3 Unknown, 0 Unchecked, 14.8s Time] [2024-11-06 14:21:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-06 14:21:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2024-11-06 14:21:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 181 states have (on average 1.2154696132596685) internal successors, (220), 185 states have internal predecessors, (220), 30 states have call successors, (30), 18 states have call predecessors, (30), 20 states have return successors, (36), 28 states have call predecessors, (36), 28 states have call successors, (36) [2024-11-06 14:21:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 286 transitions. [2024-11-06 14:21:39,799 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 286 transitions. Word has length 100 [2024-11-06 14:21:39,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:21:39,800 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 286 transitions. [2024-11-06 14:21:39,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 23 states have internal predecessors, (123), 10 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-06 14:21:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 286 transitions. [2024-11-06 14:21:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-06 14:21:39,801 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:21:39,801 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2024-11-06 14:21:39,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-06 14:21:40,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:40,002 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:21:40,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:21:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1912565116, now seen corresponding path program 1 times [2024-11-06 14:21:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:21:40,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772346847] [2024-11-06 14:21:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:21:40,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:40,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:21:40,005 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:21:40,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-06 14:21:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:21:40,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-06 14:21:40,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:21:40,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-06 14:21:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-06 14:21:41,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:21:43,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2024-11-06 14:21:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-06 14:21:43,210 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:21:43,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772346847] [2024-11-06 14:21:43,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772346847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:21:43,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:21:43,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2024-11-06 14:21:43,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557332673] [2024-11-06 14:21:43,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:21:43,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-06 14:21:43,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:21:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-06 14:21:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-06 14:21:43,212 INFO L87 Difference]: Start difference. First operand 232 states and 286 transitions. Second operand has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 13 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-06 14:21:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:21:46,848 INFO L93 Difference]: Finished difference Result 586 states and 736 transitions. [2024-11-06 14:21:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-06 14:21:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 13 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 100 [2024-11-06 14:21:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:21:46,851 INFO L225 Difference]: With dead ends: 586 [2024-11-06 14:21:46,851 INFO L226 Difference]: Without dead ends: 456 [2024-11-06 14:21:46,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 174 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=267, Invalid=1539, Unknown=0, NotChecked=0, Total=1806 [2024-11-06 14:21:46,852 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 185 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-06 14:21:46,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1010 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-06 14:21:46,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2024-11-06 14:21:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 390. [2024-11-06 14:21:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 301 states have (on average 1.2192691029900333) internal successors, (367), 311 states have internal predecessors, (367), 52 states have call successors, (52), 28 states have call predecessors, (52), 36 states have return successors, (70), 50 states have call predecessors, (70), 48 states have call successors, (70) [2024-11-06 14:21:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 489 transitions. [2024-11-06 14:21:46,911 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 489 transitions. Word has length 100 [2024-11-06 14:21:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:21:46,911 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 489 transitions. [2024-11-06 14:21:46,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 27 states have internal predecessors, (130), 13 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-06 14:21:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 489 transitions. [2024-11-06 14:21:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-06 14:21:46,913 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:21:46,913 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2024-11-06 14:21:46,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-06 14:21:47,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:47,114 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:21:47,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:21:47,114 INFO L85 PathProgramCache]: Analyzing trace with hash 901447866, now seen corresponding path program 1 times [2024-11-06 14:21:47,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:21:47,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467228522] [2024-11-06 14:21:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:21:47,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:21:47,117 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:21:47,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-06 14:21:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:21:47,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 14:21:47,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:21:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-06 14:21:47,435 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:21:47,435 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:21:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467228522] [2024-11-06 14:21:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467228522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:21:47,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:21:47,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-06 14:21:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249978389] [2024-11-06 14:21:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:21:47,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 14:21:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:21:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 14:21:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-06 14:21:47,437 INFO L87 Difference]: Start difference. First operand 390 states and 489 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-06 14:21:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:21:47,600 INFO L93 Difference]: Finished difference Result 839 states and 1079 transitions. [2024-11-06 14:21:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 14:21:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 100 [2024-11-06 14:21:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:21:47,603 INFO L225 Difference]: With dead ends: 839 [2024-11-06 14:21:47,604 INFO L226 Difference]: Without dead ends: 377 [2024-11-06 14:21:47,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-06 14:21:47,606 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 22 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 14:21:47,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 380 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 14:21:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2024-11-06 14:21:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2024-11-06 14:21:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 288 states have (on average 1.2013888888888888) internal successors, (346), 298 states have internal predecessors, (346), 52 states have call successors, (52), 28 states have call predecessors, (52), 36 states have return successors, (70), 50 states have call predecessors, (70), 48 states have call successors, (70) [2024-11-06 14:21:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 468 transitions. [2024-11-06 14:21:47,684 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 468 transitions. Word has length 100 [2024-11-06 14:21:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:21:47,684 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 468 transitions. [2024-11-06 14:21:47,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-06 14:21:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 468 transitions. [2024-11-06 14:21:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-06 14:21:47,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:21:47,686 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2024-11-06 14:21:47,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-06 14:21:47,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:47,887 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:21:47,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:21:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 364122814, now seen corresponding path program 1 times [2024-11-06 14:21:47,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:21:47,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132132777] [2024-11-06 14:21:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:21:47,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:21:47,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:21:47,890 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:21:47,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-06 14:21:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:21:48,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-06 14:21:48,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:21:48,299 INFO L349 Elim1Store]: treesize reduction 50, result has 41.2 percent of original size [2024-11-06 14:21:48,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 104 [2024-11-06 14:21:48,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-06 14:21:48,327 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-06 14:21:48,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-06 14:21:48,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 20 [2024-11-06 14:21:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-06 14:21:52,907 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:21:52,907 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:21:52,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132132777] [2024-11-06 14:21:52,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132132777] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:21:52,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:21:52,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-06 14:21:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760342875] [2024-11-06 14:21:52,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:21:52,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-06 14:21:52,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:21:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-06 14:21:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-06 14:21:52,910 INFO L87 Difference]: Start difference. First operand 377 states and 468 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 14:21:56,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:22:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:01,061 INFO L93 Difference]: Finished difference Result 503 states and 623 transitions. [2024-11-06 14:22:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-06 14:22:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 102 [2024-11-06 14:22:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:01,064 INFO L225 Difference]: With dead ends: 503 [2024-11-06 14:22:01,064 INFO L226 Difference]: Without dead ends: 380 [2024-11-06 14:22:01,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-06 14:22:01,065 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 36 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:01,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 586 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 4 Unknown, 0 Unchecked, 7.6s Time] [2024-11-06 14:22:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-11-06 14:22:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 196. [2024-11-06 14:22:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 149 states have (on average 1.1879194630872483) internal successors, (177), 154 states have internal predecessors, (177), 27 states have call successors, (27), 15 states have call predecessors, (27), 19 states have return successors, (36), 26 states have call predecessors, (36), 25 states have call successors, (36) [2024-11-06 14:22:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 240 transitions. [2024-11-06 14:22:01,104 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 240 transitions. Word has length 102 [2024-11-06 14:22:01,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:01,104 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 240 transitions. [2024-11-06 14:22:01,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-06 14:22:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 240 transitions. [2024-11-06 14:22:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-06 14:22:01,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:01,105 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:22:01,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-06 14:22:01,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:01,306 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:01,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2065682137, now seen corresponding path program 1 times [2024-11-06 14:22:01,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:01,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327675337] [2024-11-06 14:22:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:01,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:01,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:01,308 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:01,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-06 14:22:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:01,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-06 14:22:01,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:01,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 8 [2024-11-06 14:22:01,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-06 14:22:01,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-06 14:22:01,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1