/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 15:07:19,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 15:07:19,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-04 15:07:19,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 15:07:19,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 15:07:19,690 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 15:07:19,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 15:07:19,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 15:07:19,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 15:07:19,692 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 15:07:19,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 15:07:19,693 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 15:07:19,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 15:07:19,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 15:07:19,693 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 15:07:19,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 15:07:19,694 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 15:07:19,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 15:07:19,697 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 15:07:19,697 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 15:07:19,697 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 15:07:19,699 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 15:07:19,700 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 15:07:19,700 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 15:07:19,700 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 15:07:19,700 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 15:07:19,700 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 15:07:19,700 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 15:07:19,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 15:07:19,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 15:07:19,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 15:07:19,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 15:07:19,701 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 15:07:19,701 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 15:07:19,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 15:07:19,702 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 15:07:19,702 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 15:07:19,702 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 15:07:19,702 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 15:07:19,702 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 15:07:19,702 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 15:07:19,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:19,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 15:07:19,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 15:07:19,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 15:07:19,911 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 15:07:19,912 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 15:07:19,912 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i [2024-11-04 15:07:21,181 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 15:07:21,552 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 15:07:21,553 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_init_harness.i [2024-11-04 15:07:21,580 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b428dbb5/604b0d666ea648969539b0bf55707a35/FLAG69b8febfb [2024-11-04 15:07:21,755 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b428dbb5/604b0d666ea648969539b0bf55707a35 [2024-11-04 15:07:21,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 15:07:21,759 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 15:07:21,761 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 15:07:21,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 15:07:21,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 15:07:21,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:07:21" (1/1) ... [2024-11-04 15:07:21,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6edf45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:21, skipping insertion in model container [2024-11-04 15:07:21,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:07:21" (1/1) ... [2024-11-04 15:07:21,852 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 15:07:22,123 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_init_harness.i[4494,4507] [2024-11-04 15:07:22,129 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_init_harness.i[4554,4567] [2024-11-04 15:07:22,542 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,612 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,612 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,613 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,621 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,628 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,628 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,629 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,631 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,631 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,631 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,633 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,634 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,642 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,642 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,655 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,655 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,655 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,656 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,657 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,657 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,657 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,658 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,659 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,659 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,659 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,660 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,660 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,664 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:22,923 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,923 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,924 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:22,924 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,008 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:23,054 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-04 15:07:23,079 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 15:07:23,083 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_init_harness.i[4494,4507] [2024-11-04 15:07:23,083 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_init_harness.i[4554,4567] [2024-11-04 15:07:23,107 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,120 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,121 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,121 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,124 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,125 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,126 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,126 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,126 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,127 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,127 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,128 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,129 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,130 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,130 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,133 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,134 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,134 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,134 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,135 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,135 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,135 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,136 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,136 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,137 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,137 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,137 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,138 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,138 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,180 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,181 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,181 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,181 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,213 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:23,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:23,224 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 15:07:23,234 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_init_harness.i[4494,4507] [2024-11-04 15:07:23,234 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_init_harness.i[4554,4567] [2024-11-04 15:07:23,259 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,259 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,260 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,260 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,260 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,265 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,265 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,266 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,266 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,266 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,267 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,267 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,267 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:23,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:23,437 WARN L710 CHandler]: The following functions are not defined or handled internally: aws_array_list_ensure_capacity [2024-11-04 15:07:23,446 INFO L204 MainTranslator]: Completed translation [2024-11-04 15:07:23,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23 WrapperNode [2024-11-04 15:07:23,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 15:07:23,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 15:07:23,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 15:07:23,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 15:07:23,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,496 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,518 INFO L138 Inliner]: procedures = 687, calls = 1034, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 93 [2024-11-04 15:07:23,518 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 15:07:23,519 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 15:07:23,519 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 15:07:23,519 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 15:07:23,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,534 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,560 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 13, 5]. 65 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 4 writes are split as follows [0, 4, 0]. [2024-11-04 15:07:23,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,576 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 15:07:23,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 15:07:23,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 15:07:23,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 15:07:23,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (1/1) ... [2024-11-04 15:07:23,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 15:07:23,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:23,635 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) [2024-11-04 15:07:23,637 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 [2024-11-04 15:07:23,656 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2024-11-04 15:07:23,656 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2024-11-04 15:07:23,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-04 15:07:23,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 15:07:23,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-04 15:07:23,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-04 15:07:23,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-04 15:07:23,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-04 15:07:23,657 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-04 15:07:23,658 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-04 15:07:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2024-11-04 15:07:23,658 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2024-11-04 15:07:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 15:07:23,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2024-11-04 15:07:23,659 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-04 15:07:23,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-04 15:07:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-04 15:07:23,868 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 15:07:23,871 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 15:07:24,079 INFO L? ?]: Removed 41 outVars from TransFormulas that were not future-live. [2024-11-04 15:07:24,079 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 15:07:24,089 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 15:07:24,089 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-04 15:07:24,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:07:24 BoogieIcfgContainer [2024-11-04 15:07:24,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 15:07:24,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 15:07:24,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 15:07:24,095 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 15:07:24,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 03:07:21" (1/3) ... [2024-11-04 15:07:24,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f530496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:07:24, skipping insertion in model container [2024-11-04 15:07:24,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:23" (2/3) ... [2024-11-04 15:07:24,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f530496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:07:24, skipping insertion in model container [2024-11-04 15:07:24,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:07:24" (3/3) ... [2024-11-04 15:07:24,097 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2024-11-04 15:07:24,108 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 15:07:24,109 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 15:07:24,160 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 15:07:24,164 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;@34570510, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 15:07:24,165 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 15:07:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-04 15:07:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-04 15:07:24,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:24,204 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:24,205 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:24,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:24,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1017333715, now seen corresponding path program 1 times [2024-11-04 15:07:24,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:24,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158176941] [2024-11-04 15:07:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:24,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:24,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:24,235 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) [2024-11-04 15:07:24,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-04 15:07:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:24,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-04 15:07:24,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:24,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:24,441 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:24,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158176941] [2024-11-04 15:07:24,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [158176941] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:24,445 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:24,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-04 15:07:24,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741402055] [2024-11-04 15:07:24,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:24,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-04 15:07:24,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-04 15:07:24,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 15:07:24,471 INFO L87 Difference]: Start difference. First operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-04 15:07:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:24,488 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2024-11-04 15:07:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-04 15:07:24,490 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-04 15:07:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:24,495 INFO L225 Difference]: With dead ends: 117 [2024-11-04 15:07:24,495 INFO L226 Difference]: Without dead ends: 56 [2024-11-04 15:07:24,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 15:07:24,500 INFO L432 NwaCegarLoop]: 75 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, 75 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 [2024-11-04 15:07:24,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:24,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-04 15:07:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-04 15:07:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-04 15:07:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2024-11-04 15:07:24,529 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2024-11-04 15:07:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:24,529 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2024-11-04 15:07:24,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-04 15:07:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2024-11-04 15:07:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-04 15:07:24,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:24,531 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:24,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-04 15:07:24,731 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 [2024-11-04 15:07:24,731 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:24,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1834982165, now seen corresponding path program 1 times [2024-11-04 15:07:24,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:24,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710270928] [2024-11-04 15:07:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:24,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:24,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:24,734 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) [2024-11-04 15:07:24,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-04 15:07:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:24,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-04 15:07:24,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:24,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2024-11-04 15:07:24,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-04 15:07:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:25,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:25,778 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:25,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710270928] [2024-11-04 15:07:25,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [710270928] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:25,778 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:25,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 6] imperfect sequences [] total 14 [2024-11-04 15:07:25,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171138495] [2024-11-04 15:07:25,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:25,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-04 15:07:25,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-04 15:07:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-04 15:07:25,781 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 15:07:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:26,330 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2024-11-04 15:07:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-04 15:07:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-11-04 15:07:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:26,333 INFO L225 Difference]: With dead ends: 114 [2024-11-04 15:07:26,333 INFO L226 Difference]: Without dead ends: 65 [2024-11-04 15:07:26,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-04 15:07:26,335 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 61 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:26,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 389 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-04 15:07:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-04 15:07:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2024-11-04 15:07:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 46 states have internal predecessors, (57), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-04 15:07:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2024-11-04 15:07:26,350 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 26 [2024-11-04 15:07:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:26,350 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2024-11-04 15:07:26,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 15:07:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2024-11-04 15:07:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-04 15:07:26,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:26,351 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:26,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:26,555 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 [2024-11-04 15:07:26,555 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:26,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1650638505, now seen corresponding path program 1 times [2024-11-04 15:07:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:26,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065013070] [2024-11-04 15:07:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:26,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:26,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:26,563 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) [2024-11-04 15:07:26,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-04 15:07:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:26,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-04 15:07:26,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:26,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-04 15:07:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:27,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:27,645 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:27,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065013070] [2024-11-04 15:07:27,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065013070] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:27,646 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:27,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 19 [2024-11-04 15:07:27,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103121032] [2024-11-04 15:07:27,646 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:27,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-04 15:07:27,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-04 15:07:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-04 15:07:27,647 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 15:07:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:28,400 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2024-11-04 15:07:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-04 15:07:28,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-11-04 15:07:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:28,402 INFO L225 Difference]: With dead ends: 131 [2024-11-04 15:07:28,402 INFO L226 Difference]: Without dead ends: 79 [2024-11-04 15:07:28,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2024-11-04 15:07:28,403 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 129 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:28,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 616 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-04 15:07:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-04 15:07:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2024-11-04 15:07:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 55 states have internal predecessors, (72), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-04 15:07:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2024-11-04 15:07:28,425 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 26 [2024-11-04 15:07:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:28,425 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2024-11-04 15:07:28,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 15:07:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2024-11-04 15:07:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-04 15:07:28,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:28,426 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:28,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:28,626 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 [2024-11-04 15:07:28,627 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:28,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1257611495, now seen corresponding path program 1 times [2024-11-04 15:07:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:28,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414284328] [2024-11-04 15:07:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:28,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:28,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:28,635 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) [2024-11-04 15:07:28,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-04 15:07:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:28,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-04 15:07:28,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:28,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-04 15:07:28,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2024-11-04 15:07:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:29,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:29,705 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:29,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414284328] [2024-11-04 15:07:29,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [414284328] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:29,705 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:29,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 7] imperfect sequences [] total 16 [2024-11-04 15:07:29,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898751845] [2024-11-04 15:07:29,706 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:29,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-04 15:07:29,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:29,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-04 15:07:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-11-04 15:07:29,711 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 15:07:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:30,548 INFO L93 Difference]: Finished difference Result 158 states and 211 transitions. [2024-11-04 15:07:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-04 15:07:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-11-04 15:07:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:30,550 INFO L225 Difference]: With dead ends: 158 [2024-11-04 15:07:30,550 INFO L226 Difference]: Without dead ends: 96 [2024-11-04 15:07:30,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-04 15:07:30,555 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 112 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:30,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 460 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-04 15:07:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-04 15:07:30,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2024-11-04 15:07:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.368421052631579) internal successors, (78), 59 states have internal predecessors, (78), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-04 15:07:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2024-11-04 15:07:30,572 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 26 [2024-11-04 15:07:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:30,572 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2024-11-04 15:07:30,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 15:07:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2024-11-04 15:07:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-04 15:07:30,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:30,573 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:30,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:30,774 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 [2024-11-04 15:07:30,774 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:30,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:30,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1515776933, now seen corresponding path program 1 times [2024-11-04 15:07:30,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:30,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625543080] [2024-11-04 15:07:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:30,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:30,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:30,777 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) [2024-11-04 15:07:30,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-04 15:07:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:30,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-04 15:07:30,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:30,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2024-11-04 15:07:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:31,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:31,511 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625543080] [2024-11-04 15:07:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [625543080] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:31,511 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:31,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 19 [2024-11-04 15:07:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332268573] [2024-11-04 15:07:31,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:31,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-04 15:07:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-04 15:07:31,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-04 15:07:31,513 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 15:07:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:32,514 INFO L93 Difference]: Finished difference Result 180 states and 245 transitions. [2024-11-04 15:07:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-04 15:07:32,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-11-04 15:07:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:32,515 INFO L225 Difference]: With dead ends: 180 [2024-11-04 15:07:32,516 INFO L226 Difference]: Without dead ends: 114 [2024-11-04 15:07:32,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2024-11-04 15:07:32,517 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:32,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 721 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-04 15:07:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-04 15:07:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2024-11-04 15:07:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 63 states have internal predecessors, (84), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-04 15:07:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2024-11-04 15:07:32,540 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 26 [2024-11-04 15:07:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:32,540 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2024-11-04 15:07:32,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-04 15:07:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2024-11-04 15:07:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-04 15:07:32,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:32,541 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:32,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-04 15:07:32,742 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 [2024-11-04 15:07:32,742 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:32,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:32,743 INFO L85 PathProgramCache]: Analyzing trace with hash 504659683, now seen corresponding path program 1 times [2024-11-04 15:07:32,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:32,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768759985] [2024-11-04 15:07:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:32,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:32,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:32,745 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) [2024-11-04 15:07:32,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-04 15:07:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:32,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-04 15:07:32,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:32,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:32,942 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:32,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768759985] [2024-11-04 15:07:32,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [768759985] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:32,943 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:32,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2024-11-04 15:07:32,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305817389] [2024-11-04 15:07:32,943 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:32,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-04 15:07:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-04 15:07:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-04 15:07:32,944 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 15:07:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:33,022 INFO L93 Difference]: Finished difference Result 177 states and 242 transitions. [2024-11-04 15:07:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-04 15:07:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-11-04 15:07:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:33,024 INFO L225 Difference]: With dead ends: 177 [2024-11-04 15:07:33,024 INFO L226 Difference]: Without dead ends: 74 [2024-11-04 15:07:33,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:33,029 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 22 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:33,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 460 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 15:07:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-04 15:07:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-04 15:07:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 56 states have internal predecessors, (72), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-04 15:07:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2024-11-04 15:07:33,044 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 26 [2024-11-04 15:07:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:33,044 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2024-11-04 15:07:33,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 15:07:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2024-11-04 15:07:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-04 15:07:33,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:33,045 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:33,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:33,245 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 [2024-11-04 15:07:33,246 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:33,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:33,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1687611897, now seen corresponding path program 1 times [2024-11-04 15:07:33,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:33,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967647405] [2024-11-04 15:07:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:33,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:33,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:33,248 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) [2024-11-04 15:07:33,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-04 15:07:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:33,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-04 15:07:33,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:33,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:33,477 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967647405] [2024-11-04 15:07:33,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [967647405] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:33,477 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:33,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2024-11-04 15:07:33,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310733741] [2024-11-04 15:07:33,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:33,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-04 15:07:33,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:33,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-04 15:07:33,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-04 15:07:33,478 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 15:07:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:33,587 INFO L93 Difference]: Finished difference Result 149 states and 189 transitions. [2024-11-04 15:07:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-04 15:07:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-04 15:07:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:33,588 INFO L225 Difference]: With dead ends: 149 [2024-11-04 15:07:33,588 INFO L226 Difference]: Without dead ends: 80 [2024-11-04 15:07:33,589 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-04 15:07:33,589 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 32 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:33,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 309 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 15:07:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-04 15:07:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2024-11-04 15:07:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 56 states have internal predecessors, (70), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-04 15:07:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2024-11-04 15:07:33,600 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 28 [2024-11-04 15:07:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:33,601 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2024-11-04 15:07:33,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 15:07:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2024-11-04 15:07:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-04 15:07:33,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:33,601 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:33,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:33,802 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 [2024-11-04 15:07:33,802 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:33,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1850407916, now seen corresponding path program 1 times [2024-11-04 15:07:33,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374135249] [2024-11-04 15:07:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:33,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:33,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:33,804 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) [2024-11-04 15:07:33,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-04 15:07:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:33,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-04 15:07:33,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:33,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:34,053 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:34,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374135249] [2024-11-04 15:07:34,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [374135249] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:34,053 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:34,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 12 [2024-11-04 15:07:34,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256540852] [2024-11-04 15:07:34,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:34,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-04 15:07:34,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-04 15:07:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-04 15:07:34,054 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 15:07:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:34,265 INFO L93 Difference]: Finished difference Result 161 states and 205 transitions. [2024-11-04 15:07:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-04 15:07:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-04 15:07:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:34,266 INFO L225 Difference]: With dead ends: 161 [2024-11-04 15:07:34,266 INFO L226 Difference]: Without dead ends: 90 [2024-11-04 15:07:34,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-04 15:07:34,267 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 34 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:34,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 443 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 15:07:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-04 15:07:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2024-11-04 15:07:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 58 states have internal predecessors, (72), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-04 15:07:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2024-11-04 15:07:34,277 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 30 [2024-11-04 15:07:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:34,277 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2024-11-04 15:07:34,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 15:07:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2024-11-04 15:07:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-04 15:07:34,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:34,278 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:34,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-04 15:07:34,478 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 [2024-11-04 15:07:34,479 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:34,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1395309347, now seen corresponding path program 1 times [2024-11-04 15:07:34,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:34,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296026071] [2024-11-04 15:07:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:34,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:34,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:34,481 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) [2024-11-04 15:07:34,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-04 15:07:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:34,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 15:07:34,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:34,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:34,594 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:34,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296026071] [2024-11-04 15:07:34,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296026071] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:34,595 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:34,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-11-04 15:07:34,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521952296] [2024-11-04 15:07:34,595 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:34,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 15:07:34,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:34,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 15:07:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:34,596 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 15:07:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:34,625 INFO L93 Difference]: Finished difference Result 149 states and 193 transitions. [2024-11-04 15:07:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-04 15:07:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-04 15:07:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:34,628 INFO L225 Difference]: With dead ends: 149 [2024-11-04 15:07:34,628 INFO L226 Difference]: Without dead ends: 84 [2024-11-04 15:07:34,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:34,629 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:34,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 185 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-04 15:07:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2024-11-04 15:07:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 60 states have internal predecessors, (74), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-04 15:07:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-11-04 15:07:34,639 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 31 [2024-11-04 15:07:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:34,639 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-11-04 15:07:34,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 15:07:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-11-04 15:07:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-04 15:07:34,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:34,640 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:34,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:34,840 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 [2024-11-04 15:07:34,841 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:34,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1854431003, now seen corresponding path program 1 times [2024-11-04 15:07:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:34,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184885769] [2024-11-04 15:07:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:34,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:34,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:34,843 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) [2024-11-04 15:07:34,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-04 15:07:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:34,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-04 15:07:34,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:35,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-04 15:07:35,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-04 15:07:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:36,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:37,881 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:37,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184885769] [2024-11-04 15:07:37,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184885769] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:37,882 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:37,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18, 11] imperfect sequences [] total 27 [2024-11-04 15:07:37,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043991919] [2024-11-04 15:07:37,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:37,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-04 15:07:37,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-04 15:07:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2024-11-04 15:07:37,883 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 27 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 15:07:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:40,032 INFO L93 Difference]: Finished difference Result 168 states and 213 transitions. [2024-11-04 15:07:40,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-04 15:07:40,033 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2024-11-04 15:07:40,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:40,037 INFO L225 Difference]: With dead ends: 168 [2024-11-04 15:07:40,037 INFO L226 Difference]: Without dead ends: 101 [2024-11-04 15:07:40,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2024-11-04 15:07:40,038 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:40,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 602 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-04 15:07:40,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-04 15:07:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2024-11-04 15:07:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.278688524590164) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-04 15:07:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2024-11-04 15:07:40,061 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2024-11-04 15:07:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:40,061 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2024-11-04 15:07:40,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 15:07:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2024-11-04 15:07:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-04 15:07:40,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:40,062 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:40,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-04 15:07:40,263 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 [2024-11-04 15:07:40,263 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:40,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1596265565, now seen corresponding path program 1 times [2024-11-04 15:07:40,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:40,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284468124] [2024-11-04 15:07:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:40,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:40,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:40,268 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) [2024-11-04 15:07:40,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-04 15:07:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:40,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-04 15:07:40,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:40,379 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 [2024-11-04 15:07:40,382 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 [2024-11-04 15:07:44,615 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_3| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_3|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_3| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_3|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_3|))))) is different from true [2024-11-04 15:07:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:45,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:46,024 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:46,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284468124] [2024-11-04 15:07:46,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284468124] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:46,024 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:46,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 11] imperfect sequences [] total 22 [2024-11-04 15:07:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454303725] [2024-11-04 15:07:46,025 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:46,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-04 15:07:46,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-04 15:07:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=360, Unknown=1, NotChecked=38, Total=462 [2024-11-04 15:07:46,026 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-04 15:07:50,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:07:52,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:07:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:52,899 INFO L93 Difference]: Finished difference Result 195 states and 258 transitions. [2024-11-04 15:07:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-04 15:07:52,899 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2024-11-04 15:07:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:52,900 INFO L225 Difference]: With dead ends: 195 [2024-11-04 15:07:52,900 INFO L226 Difference]: Without dead ends: 120 [2024-11-04 15:07:52,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=118, Invalid=641, Unknown=1, NotChecked=52, Total=812 [2024-11-04 15:07:52,901 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 68 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:52,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 618 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 343 Invalid, 1 Unknown, 139 Unchecked, 6.4s Time] [2024-11-04 15:07:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-04 15:07:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2024-11-04 15:07:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.28) internal successors, (96), 79 states have internal predecessors, (96), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-04 15:07:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2024-11-04 15:07:52,917 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 39 [2024-11-04 15:07:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:52,917 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2024-11-04 15:07:52,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-04 15:07:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2024-11-04 15:07:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-04 15:07:52,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:52,918 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:52,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-04 15:07:53,121 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 [2024-11-04 15:07:53,122 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:53,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1687584481, now seen corresponding path program 1 times [2024-11-04 15:07:53,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:53,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225900957] [2024-11-04 15:07:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:53,124 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) [2024-11-04 15:07:53,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-04 15:07:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:53,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-04 15:07:53,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:53,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:53,485 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:53,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225900957] [2024-11-04 15:07:53,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [225900957] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:53,485 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:53,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 14 [2024-11-04 15:07:53,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53856850] [2024-11-04 15:07:53,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:53,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-04 15:07:53,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-04 15:07:53,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-04 15:07:53,486 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-04 15:07:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:53,794 INFO L93 Difference]: Finished difference Result 229 states and 310 transitions. [2024-11-04 15:07:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-04 15:07:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2024-11-04 15:07:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:53,795 INFO L225 Difference]: With dead ends: 229 [2024-11-04 15:07:53,795 INFO L226 Difference]: Without dead ends: 111 [2024-11-04 15:07:53,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-04 15:07:53,796 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:53,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 508 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 15:07:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-04 15:07:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2024-11-04 15:07:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 80 states have internal predecessors, (95), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (19), 11 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-04 15:07:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2024-11-04 15:07:53,814 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 39 [2024-11-04 15:07:53,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:53,815 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2024-11-04 15:07:53,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-04 15:07:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2024-11-04 15:07:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-04 15:07:53,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:53,816 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:53,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-04 15:07:54,016 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 [2024-11-04 15:07:54,017 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:54,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1045188466, now seen corresponding path program 1 times [2024-11-04 15:07:54,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:54,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981353596] [2024-11-04 15:07:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:54,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:54,019 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) [2024-11-04 15:07:54,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-04 15:07:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:54,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-04 15:07:54,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:54,135 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 [2024-11-04 15:07:54,139 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 [2024-11-04 15:07:58,351 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_7| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_5| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_7|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_5|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_7| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_5| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_7|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_5|))))) is different from true [2024-11-04 15:07:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:58,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:07:58,743 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:58,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981353596] [2024-11-04 15:07:58,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981353596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:07:58,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:07:58,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2024-11-04 15:07:58,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999039719] [2024-11-04 15:07:58,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:07:58,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-04 15:07:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-04 15:07:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=171, Unknown=1, NotChecked=26, Total=240 [2024-11-04 15:07:58,744 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-04 15:07:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:59,097 INFO L93 Difference]: Finished difference Result 210 states and 280 transitions. [2024-11-04 15:07:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-04 15:07:59,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2024-11-04 15:07:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:59,100 INFO L225 Difference]: With dead ends: 210 [2024-11-04 15:07:59,100 INFO L226 Difference]: Without dead ends: 121 [2024-11-04 15:07:59,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-11-04 15:07:59,101 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 33 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:59,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 422 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 189 Unchecked, 0.3s Time] [2024-11-04 15:07:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-04 15:07:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2024-11-04 15:07:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 82 states have internal predecessors, (99), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (16), 12 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-04 15:07:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2024-11-04 15:07:59,146 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 41 [2024-11-04 15:07:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:59,146 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2024-11-04 15:07:59,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-04 15:07:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2024-11-04 15:07:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-04 15:07:59,147 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:59,147 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-04 15:07:59,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:59,347 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 [2024-11-04 15:07:59,347 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:59,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 964483973, now seen corresponding path program 1 times [2024-11-04 15:07:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:59,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324261455] [2024-11-04 15:07:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:59,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:59,350 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) [2024-11-04 15:07:59,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-04 15:07:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:59,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-04 15:07:59,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-04 15:07:59,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-04 15:07:59,674 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:59,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324261455] [2024-11-04 15:07:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [324261455] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:59,674 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 16 [2024-11-04 15:07:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519737987] [2024-11-04 15:07:59,674 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:59,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-04 15:07:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-04 15:07:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-11-04 15:07:59,675 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-04 15:07:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:59,766 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2024-11-04 15:07:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-04 15:07:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2024-11-04 15:07:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:59,768 INFO L225 Difference]: With dead ends: 119 [2024-11-04 15:07:59,768 INFO L226 Difference]: Without dead ends: 117 [2024-11-04 15:07:59,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-04 15:07:59,768 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:59,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 676 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 15:07:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-04 15:07:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2024-11-04 15:07:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.25) internal successors, (105), 89 states have internal predecessors, (105), 15 states have call successors, (15), 9 states have call predecessors, (15), 12 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-04 15:07:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2024-11-04 15:07:59,787 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 42 [2024-11-04 15:07:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:59,787 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2024-11-04 15:07:59,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-04 15:07:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2024-11-04 15:07:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-04 15:07:59,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:59,788 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-04 15:07:59,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:59,988 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 [2024-11-04 15:07:59,988 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:59,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1440497479, now seen corresponding path program 1 times [2024-11-04 15:07:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:59,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460380988] [2024-11-04 15:07:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:59,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:59,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:59,994 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) [2024-11-04 15:07:59,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-04 15:08:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:00,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-04 15:08:00,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:00,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2024-11-04 15:08:00,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2024-11-04 15:08:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:08:24,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:08:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-04 15:08:25,615 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:08:25,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460380988] [2024-11-04 15:08:25,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1460380988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:08:25,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:08:25,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2024-11-04 15:08:25,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699794762] [2024-11-04 15:08:25,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:08:25,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-04 15:08:25,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:08:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-04 15:08:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=274, Unknown=6, NotChecked=0, Total=342 [2024-11-04 15:08:25,616 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 19 states, 16 states have (on average 4.1875) internal successors, (67), 18 states have internal predecessors, (67), 10 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-04 15:08:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:08:27,727 INFO L93 Difference]: Finished difference Result 237 states and 299 transitions. [2024-11-04 15:08:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-04 15:08:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.1875) internal successors, (67), 18 states have internal predecessors, (67), 10 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2024-11-04 15:08:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:08:27,734 INFO L225 Difference]: With dead ends: 237 [2024-11-04 15:08:27,734 INFO L226 Difference]: Without dead ends: 136 [2024-11-04 15:08:27,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=137, Invalid=613, Unknown=6, NotChecked=0, Total=756 [2024-11-04 15:08:27,735 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 132 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-04 15:08:27,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 449 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-04 15:08:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-04 15:08:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2024-11-04 15:08:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 79 states have (on average 1.240506329113924) internal successors, (98), 83 states have internal predecessors, (98), 13 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-04 15:08:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2024-11-04 15:08:27,769 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 50 [2024-11-04 15:08:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:08:27,769 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2024-11-04 15:08:27,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.1875) internal successors, (67), 18 states have internal predecessors, (67), 10 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-04 15:08:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2024-11-04 15:08:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-04 15:08:27,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:08:27,770 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:08:27,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-04 15:08:27,970 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 [2024-11-04 15:08:27,970 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:08:27,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:08:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash -41969126, now seen corresponding path program 1 times [2024-11-04 15:08:27,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:08:27,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901383603] [2024-11-04 15:08:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:08:27,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:27,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:08:27,972 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) [2024-11-04 15:08:27,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-04 15:08:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:28,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-04 15:08:28,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:28,137 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 [2024-11-04 15:08:28,140 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 [2024-11-04 15:08:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 15:08:29,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:08:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-04 15:08:30,487 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:08:30,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901383603] [2024-11-04 15:08:30,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901383603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:08:30,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:08:30,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 30 [2024-11-04 15:08:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262200572] [2024-11-04 15:08:30,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:08:30,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-04 15:08:30,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:08:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-04 15:08:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2024-11-04 15:08:30,488 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 30 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-04 15:08:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:08:32,952 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2024-11-04 15:08:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-04 15:08:32,952 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 58 [2024-11-04 15:08:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:08:32,953 INFO L225 Difference]: With dead ends: 188 [2024-11-04 15:08:32,953 INFO L226 Difference]: Without dead ends: 138 [2024-11-04 15:08:32,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=237, Invalid=2115, Unknown=0, NotChecked=0, Total=2352 [2024-11-04 15:08:32,954 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 174 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-04 15:08:32,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 821 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-04 15:08:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-04 15:08:32,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2024-11-04 15:08:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.1875) internal successors, (114), 98 states have internal predecessors, (114), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 12 states have call predecessors, (15), 13 states have call successors, (15) [2024-11-04 15:08:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2024-11-04 15:08:32,977 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 58 [2024-11-04 15:08:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:08:32,977 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2024-11-04 15:08:32,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-04 15:08:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2024-11-04 15:08:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-04 15:08:32,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:08:32,978 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:08:32,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-04 15:08:33,182 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 [2024-11-04 15:08:33,183 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:08:33,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:08:33,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1239716043, now seen corresponding path program 1 times [2024-11-04 15:08:33,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:08:33,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114702974] [2024-11-04 15:08:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:08:33,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:33,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:08:33,185 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) [2024-11-04 15:08:33,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-04 15:08:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:33,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-04 15:08:33,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:33,358 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 42 treesize of output 9 [2024-11-04 15:08:33,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 17 [2024-11-04 15:08:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-04 15:08:34,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:08:35,327 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 1378 treesize of output 1354 [2024-11-04 15:08:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-04 15:08:35,373 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-04 15:08:35,373 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-04 15:08:35,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-04 15:08:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-04 15:08:35,395 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:08:35,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114702974] [2024-11-04 15:08:35,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [114702974] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:08:35,396 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:08:35,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 8] imperfect sequences [] total 16 [2024-11-04 15:08:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968273389] [2024-11-04 15:08:35,396 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:08:35,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-04 15:08:35,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:08:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-04 15:08:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-04 15:08:35,397 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 16 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 9 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-04 15:08:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:08:36,716 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2024-11-04 15:08:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-04 15:08:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 9 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 78 [2024-11-04 15:08:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:08:36,717 INFO L225 Difference]: With dead ends: 144 [2024-11-04 15:08:36,717 INFO L226 Difference]: Without dead ends: 137 [2024-11-04 15:08:36,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-11-04 15:08:36,718 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 38 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-04 15:08:36,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 582 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-04 15:08:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-04 15:08:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 121. [2024-11-04 15:08:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 97 states have internal predecessors, (109), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-11-04 15:08:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2024-11-04 15:08:36,744 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 78 [2024-11-04 15:08:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:08:36,744 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2024-11-04 15:08:36,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 9 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-04 15:08:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2024-11-04 15:08:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-04 15:08:36,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:08:36,745 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:08:36,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-04 15:08:36,948 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 [2024-11-04 15:08:36,949 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:08:36,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:08:36,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2049062669, now seen corresponding path program 1 times [2024-11-04 15:08:36,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:08:36,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444693237] [2024-11-04 15:08:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:08:36,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:36,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:08:36,951 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) [2024-11-04 15:08:36,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-04 15:08:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:37,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-04 15:08:37,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-04 15:08:37,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-04 15:08:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-04 15:08:37,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 17 [2024-11-04 15:08:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-04 15:08:38,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:08:55,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3162 treesize of output 3114 [2024-11-04 15:08:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-04 15:08:55,350 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:08:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444693237] [2024-11-04 15:08:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [444693237] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:08:55,350 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:08:55,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 10] imperfect sequences [] total 21 [2024-11-04 15:08:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138747066] [2024-11-04 15:08:55,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:08:55,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-04 15:08:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:08:55,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-04 15:08:55,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=342, Unknown=4, NotChecked=0, Total=420 [2024-11-04 15:08:55,352 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 21 states, 16 states have (on average 6.25) internal successors, (100), 18 states have internal predecessors, (100), 12 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18)