/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.trace.refinement.strategy FOX -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_prev_harness.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-17387ad-m [2024-11-06 14:22:14,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 14:22:14,786 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-06 14:22:14,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 14:22:14,791 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 14:22:14,812 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 14:22:14,813 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 14:22:14,813 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 14:22:14,813 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 14:22:14,814 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 14:22:14,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 14:22:14,815 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 14:22:14,816 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 14:22:14,818 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 14:22:14,818 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 14:22:14,819 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 14:22:14,819 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 14:22:14,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 14:22:14,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 14:22:14,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 14:22:14,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 14:22:14,820 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-06 14:22:14,820 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-06 14:22:14,820 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 14:22:14,820 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-06 14:22:14,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 14:22:14,820 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 14:22:14,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 14:22:14,821 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 14:22:14,821 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 14:22:14,821 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 14:22:14,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 14:22:14,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 14:22:14,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 14:22:14,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 14:22:14,822 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-06 14:22:14,822 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-06 14:22:14,822 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 14:22:14,822 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 14:22:14,824 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 14:22:14,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 14:22:14,825 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX [2024-11-06 14:22:15,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 14:22:15,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 14:22:15,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 14:22:15,043 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 14:22:15,044 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 14:22:15,044 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_prev_harness.i [2024-11-06 14:22:16,268 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 14:22:16,625 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 14:22:16,626 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_prev_harness.i [2024-11-06 14:22:16,659 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb5b2c209/68eec586722f4b389efd6a5db3a50964/FLAGcf699f4cd [2024-11-06 14:22:16,835 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb5b2c209/68eec586722f4b389efd6a5db3a50964 [2024-11-06 14:22:16,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 14:22:16,837 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-06 14:22:16,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 14:22:16,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 14:22:16,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 14:22:16,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:22:16" (1/1) ... [2024-11-06 14:22:16,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1cb5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:16, skipping insertion in model container [2024-11-06 14:22:16,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:22:16" (1/1) ... [2024-11-06 14:22:16,920 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 14:22:17,134 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_prev_harness.i[4494,4507] [2024-11-06 14:22:17,141 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_prev_harness.i[4554,4567] [2024-11-06 14:22:17,558 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,626 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,626 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,627 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,634 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,638 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,638 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,639 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,639 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,639 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,641 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,644 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,644 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,647 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,647 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,654 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,655 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,655 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,657 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,659 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,659 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,659 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,660 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,660 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,661 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,662 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,662 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,663 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,663 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:17,904 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,904 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,905 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,905 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:17,999 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 14:22:18,034 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-06 14:22:18,060 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 14:22:18,065 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_prev_harness.i[4494,4507] [2024-11-06 14:22:18,065 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_prev_harness.i[4554,4567] [2024-11-06 14:22:18,090 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,103 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,104 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,104 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,107 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,111 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,112 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,112 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,113 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,113 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,113 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,115 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,116 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,117 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,117 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,121 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,121 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,121 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,122 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,122 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,123 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,123 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,123 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,124 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,124 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,124 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,124 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,125 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,125 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,171 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,171 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,172 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,172 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,193 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-06 14:22:18,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 14:22:18,202 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 14:22:18,215 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_prev_harness.i[4494,4507] [2024-11-06 14:22:18,216 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_prev_harness.i[4554,4567] [2024-11-06 14:22:18,252 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,254 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,254 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,255 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,255 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,260 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,260 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,261 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,261 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,262 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,262 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,263 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,263 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-06 14:22:18,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 14:22:18,491 WARN L710 CHandler]: The following functions are not defined or handled internally: aws_array_list_ensure_capacity [2024-11-06 14:22:18,499 INFO L204 MainTranslator]: Completed translation [2024-11-06 14:22:18,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18 WrapperNode [2024-11-06 14:22:18,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 14:22:18,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 14:22:18,501 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 14:22:18,501 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 14:22:18,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,603 INFO L138 Inliner]: procedures = 687, calls = 1039, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 57 [2024-11-06 14:22:18,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 14:22:18,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 14:22:18,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 14:22:18,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 14:22:18,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,639 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 4, 5, 6]. 35 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 2 writes are split as follows [0, 1, 0, 1]. [2024-11-06 14:22:18,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,661 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,666 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 14:22:18,667 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 14:22:18,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 14:22:18,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 14:22:18,667 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (1/1) ... [2024-11-06 14:22:18,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 14:22:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:18,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-06 14:22:18,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-06 14:22:18,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-06 14:22:18,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-06 14:22:18,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-06 14:22:18,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-06 14:22:18,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-06 14:22:18,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-06 14:22:18,719 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 14:22:18,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-06 14:22:18,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-06 14:22:18,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-06 14:22:18,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-06 14:22:18,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-06 14:22:18,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-06 14:22:18,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-06 14:22:18,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-06 14:22:18,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-06 14:22:18,720 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2024-11-06 14:22:18,720 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2024-11-06 14:22:18,937 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 14:22:18,939 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 14:22:19,108 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-06 14:22:19,108 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 14:22:19,116 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 14:22:19,116 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-06 14:22:19,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:22:19 BoogieIcfgContainer [2024-11-06 14:22:19,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 14:22:19,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 14:22:19,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 14:22:19,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 14:22:19,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:22:16" (1/3) ... [2024-11-06 14:22:19,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25195d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:22:19, skipping insertion in model container [2024-11-06 14:22:19,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:22:18" (2/3) ... [2024-11-06 14:22:19,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25195d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:22:19, skipping insertion in model container [2024-11-06 14:22:19,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:22:19" (3/3) ... [2024-11-06 14:22:19,121 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_prev_harness.i [2024-11-06 14:22:19,132 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 14:22:19,132 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 14:22:19,175 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 14:22:19,179 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;@a9fa184, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 14:22:19,179 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 14:22:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-06 14:22:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-06 14:22:19,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:19,187 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:22:19,188 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:19,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash 690008246, now seen corresponding path program 1 times [2024-11-06 14:22:19,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:19,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549944930] [2024-11-06 14:22:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:19,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:19,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:19,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:19,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-06 14:22:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:19,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-06 14:22:19,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 14:22:19,374 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:22:19,374 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549944930] [2024-11-06 14:22:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549944930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:22:19,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:22:19,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-06 14:22:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636504784] [2024-11-06 14:22:19,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:19,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-06 14:22:19,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-06 14:22:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 14:22:19,400 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-06 14:22:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:19,420 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2024-11-06 14:22:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-06 14:22:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-06 14:22:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:19,429 INFO L225 Difference]: With dead ends: 94 [2024-11-06 14:22:19,429 INFO L226 Difference]: Without dead ends: 45 [2024-11-06 14:22:19,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 14:22:19,434 INFO L432 NwaCegarLoop]: 61 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, 61 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:19,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:22:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-06 14:22:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-06 14:22:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-06 14:22:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-06 14:22:19,469 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2024-11-06 14:22:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:19,470 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-06 14:22:19,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-06 14:22:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-06 14:22:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-06 14:22:19,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:19,471 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:22:19,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-06 14:22:19,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:19,672 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:19,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:19,673 INFO L85 PathProgramCache]: Analyzing trace with hash -331060108, now seen corresponding path program 1 times [2024-11-06 14:22:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:19,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647396897] [2024-11-06 14:22:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:19,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:19,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:19,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:19,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-06 14:22:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:19,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-06 14:22:19,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:19,898 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 23 treesize of output 15 [2024-11-06 14:22:19,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 14:22:19,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 14:22:19,921 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 23 treesize of output 15 [2024-11-06 14:22:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 14:22:20,788 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:22:20,788 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:20,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647396897] [2024-11-06 14:22:20,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647396897] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:22:20,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:22:20,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-06 14:22:20,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383416556] [2024-11-06 14:22:20,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:20,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-06 14:22:20,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-06 14:22:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-06 14:22:20,795 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-06 14:22:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:22,216 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2024-11-06 14:22:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-06 14:22:22,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-11-06 14:22:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:22,219 INFO L225 Difference]: With dead ends: 56 [2024-11-06 14:22:22,219 INFO L226 Difference]: Without dead ends: 54 [2024-11-06 14:22:22,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-06 14:22:22,220 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:22,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 277 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-06 14:22:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-06 14:22:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-06 14:22:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-06 14:22:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-11-06 14:22:22,239 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 28 [2024-11-06 14:22:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:22,240 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-11-06 14:22:22,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-06 14:22:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-11-06 14:22:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-06 14:22:22,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:22,243 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] [2024-11-06 14:22:22,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-06 14:22:22,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:22,447 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:22,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:22,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1140406734, now seen corresponding path program 1 times [2024-11-06 14:22:22,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:22,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113004286] [2024-11-06 14:22:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:22,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:22,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:22,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:22,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-06 14:22:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:22,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-06 14:22:22,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:22,561 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 15 treesize of output 1 [2024-11-06 14:22:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 14:22:22,810 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:22:22,810 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:22,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113004286] [2024-11-06 14:22:22,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113004286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:22:22,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:22:22,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-06 14:22:22,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590363270] [2024-11-06 14:22:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:22,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-06 14:22:22,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:22,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-06 14:22:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-06 14:22:22,812 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-06 14:22:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:23,542 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2024-11-06 14:22:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-06 14:22:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-11-06 14:22:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:23,546 INFO L225 Difference]: With dead ends: 108 [2024-11-06 14:22:23,546 INFO L226 Difference]: Without dead ends: 58 [2024-11-06 14:22:23,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-11-06 14:22:23,547 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:23,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-06 14:22:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-06 14:22:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-06 14:22:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-06 14:22:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-11-06 14:22:23,559 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 28 [2024-11-06 14:22:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:23,560 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-11-06 14:22:23,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-06 14:22:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-11-06 14:22:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-06 14:22:23,560 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:23,561 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:22:23,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-06 14:22:23,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:23,761 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:23,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1533433744, now seen corresponding path program 1 times [2024-11-06 14:22:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680229153] [2024-11-06 14:22:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:23,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:23,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:23,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:23,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-06 14:22:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:23,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 14:22:23,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 14:22:23,896 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:22:23,896 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:23,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680229153] [2024-11-06 14:22:23,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680229153] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:22:23,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:22:23,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 14:22:23,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867259756] [2024-11-06 14:22:23,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:23,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 14:22:23,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:23,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 14:22:23,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-06 14:22:23,898 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-06 14:22:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:23,935 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-11-06 14:22:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 14:22:23,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-11-06 14:22:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:23,937 INFO L225 Difference]: With dead ends: 115 [2024-11-06 14:22:23,937 INFO L226 Difference]: Without dead ends: 60 [2024-11-06 14:22:23,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-06 14:22:23,939 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:23,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 151 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:22:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-06 14:22:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-11-06 14:22:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-06 14:22:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-06 14:22:23,951 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 28 [2024-11-06 14:22:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:23,952 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-06 14:22:23,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-06 14:22:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-06 14:22:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-06 14:22:23,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:23,953 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-06 14:22:23,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-06 14:22:24,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:24,153 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:24,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:24,154 INFO L85 PathProgramCache]: Analyzing trace with hash -398531466, now seen corresponding path program 1 times [2024-11-06 14:22:24,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:24,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734954636] [2024-11-06 14:22:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:24,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:24,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:24,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:24,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-06 14:22:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:24,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-06 14:22:24,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:24,283 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 23 treesize of output 15 [2024-11-06 14:22:24,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 14:22:24,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 14:22:24,297 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 23 treesize of output 15 [2024-11-06 14:22:25,117 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-06 14:22:25,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 123 [2024-11-06 14:22:25,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 14:22:25,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 67 [2024-11-06 14:22:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-06 14:22:25,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:22:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-06 14:22:25,822 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734954636] [2024-11-06 14:22:25,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734954636] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-06 14:22:25,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-06 14:22:25,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2024-11-06 14:22:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036506418] [2024-11-06 14:22:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:25,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-06 14:22:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-06 14:22:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2024-11-06 14:22:25,824 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 14:22:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:26,422 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2024-11-06 14:22:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-06 14:22:26,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-06 14:22:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:26,423 INFO L225 Difference]: With dead ends: 65 [2024-11-06 14:22:26,423 INFO L226 Difference]: Without dead ends: 63 [2024-11-06 14:22:26,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2024-11-06 14:22:26,424 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:26,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 343 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-06 14:22:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-06 14:22:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-06 14:22:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-06 14:22:26,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2024-11-06 14:22:26,433 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 42 [2024-11-06 14:22:26,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:26,433 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2024-11-06 14:22:26,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 14:22:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2024-11-06 14:22:26,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-06 14:22:26,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:26,434 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-06 14:22:26,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-06 14:22:26,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:26,639 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:26,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1207878092, now seen corresponding path program 1 times [2024-11-06 14:22:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:26,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825826948] [2024-11-06 14:22:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:26,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:26,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:26,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-06 14:22:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:26,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-06 14:22:26,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:26,750 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 23 treesize of output 15 [2024-11-06 14:22:26,764 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 15 treesize of output 1 [2024-11-06 14:22:26,769 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 15 treesize of output 1 [2024-11-06 14:22:26,937 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 23 treesize of output 15 [2024-11-06 14:22:26,939 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 19 treesize of output 11 [2024-11-06 14:22:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 14:22:27,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:22:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-06 14:22:27,435 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825826948] [2024-11-06 14:22:27,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825826948] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-06 14:22:27,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-06 14:22:27,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2024-11-06 14:22:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069983052] [2024-11-06 14:22:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:27,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-06 14:22:27,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:27,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-06 14:22:27,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-06 14:22:27,436 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 14:22:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:27,753 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-11-06 14:22:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-06 14:22:27,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-06 14:22:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:27,754 INFO L225 Difference]: With dead ends: 107 [2024-11-06 14:22:27,754 INFO L226 Difference]: Without dead ends: 67 [2024-11-06 14:22:27,754 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-06 14:22:27,755 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:27,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 242 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 14:22:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-06 14:22:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-06 14:22:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 states have internal predecessors, (51), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-06 14:22:27,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2024-11-06 14:22:27,767 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 42 [2024-11-06 14:22:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:27,767 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2024-11-06 14:22:27,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 14:22:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2024-11-06 14:22:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-06 14:22:27,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:27,768 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-06 14:22:27,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-06 14:22:27,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:27,968 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:27,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1600905102, now seen corresponding path program 1 times [2024-11-06 14:22:27,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:27,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766645295] [2024-11-06 14:22:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:27,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:27,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:27,970 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:27,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-06 14:22:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:28,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-06 14:22:28,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:28,072 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 15 treesize of output 1 [2024-11-06 14:22:28,139 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 16 treesize of output 8 [2024-11-06 14:22:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 14:22:28,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:22:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-06 14:22:28,244 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:28,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766645295] [2024-11-06 14:22:28,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766645295] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-06 14:22:28,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-06 14:22:28,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2024-11-06 14:22:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147623409] [2024-11-06 14:22:28,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:28,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 14:22:28,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 14:22:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-06 14:22:28,245 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 14:22:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:28,324 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2024-11-06 14:22:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-06 14:22:28,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-06 14:22:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:28,325 INFO L225 Difference]: With dead ends: 119 [2024-11-06 14:22:28,325 INFO L226 Difference]: Without dead ends: 69 [2024-11-06 14:22:28,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-06 14:22:28,326 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 5 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:28,326 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 187 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 14:22:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-06 14:22:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2024-11-06 14:22:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-06 14:22:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-11-06 14:22:28,334 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 42 [2024-11-06 14:22:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:28,334 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-11-06 14:22:28,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 14:22:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-11-06 14:22:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-06 14:22:28,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:28,335 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-06 14:22:28,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-06 14:22:28,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:28,536 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:28,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash -181120997, now seen corresponding path program 1 times [2024-11-06 14:22:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:28,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702161893] [2024-11-06 14:22:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:28,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:28,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:28,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-06 14:22:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:28,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 14:22:28,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:28,682 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 19 treesize of output 7 [2024-11-06 14:22:28,685 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 19 treesize of output 7 [2024-11-06 14:22:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-06 14:22:28,706 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:22:28,706 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702161893] [2024-11-06 14:22:28,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702161893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:22:28,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:22:28,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-06 14:22:28,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300138984] [2024-11-06 14:22:28,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:28,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 14:22:28,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:28,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 14:22:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-06 14:22:28,708 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-06 14:22:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:28,793 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-11-06 14:22:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 14:22:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2024-11-06 14:22:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:28,795 INFO L225 Difference]: With dead ends: 69 [2024-11-06 14:22:28,795 INFO L226 Difference]: Without dead ends: 67 [2024-11-06 14:22:28,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-06 14:22:28,795 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 3 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:28,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 237 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 14:22:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-06 14:22:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-06 14:22:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-06 14:22:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2024-11-06 14:22:28,805 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 48 [2024-11-06 14:22:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:28,805 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2024-11-06 14:22:28,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-06 14:22:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2024-11-06 14:22:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-06 14:22:28,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:28,806 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:22:28,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-06 14:22:29,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:29,006 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:29,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1509321987, now seen corresponding path program 1 times [2024-11-06 14:22:29,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:29,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534997578] [2024-11-06 14:22:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:29,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:29,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:29,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:29,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-06 14:22:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:29,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-06 14:22:29,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:29,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 14:22:29,134 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 23 treesize of output 15 [2024-11-06 14:22:29,142 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 23 treesize of output 15 [2024-11-06 14:22:29,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 14:22:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-06 14:22:30,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:22:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-06 14:22:35,243 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:35,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534997578] [2024-11-06 14:22:35,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534997578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:22:35,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:22:35,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2024-11-06 14:22:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289456125] [2024-11-06 14:22:35,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:22:35,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-06 14:22:35,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-06 14:22:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=558, Unknown=1, NotChecked=0, Total=650 [2024-11-06 14:22:35,245 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 26 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2024-11-06 14:22:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:36,704 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2024-11-06 14:22:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-06 14:22:36,705 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 63 [2024-11-06 14:22:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:36,706 INFO L225 Difference]: With dead ends: 78 [2024-11-06 14:22:36,706 INFO L226 Difference]: Without dead ends: 76 [2024-11-06 14:22:36,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 88 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=129, Invalid=740, Unknown=1, NotChecked=0, Total=870 [2024-11-06 14:22:36,707 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:36,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 365 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-06 14:22:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-06 14:22:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-11-06 14:22:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.14) internal successors, (57), 54 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-06 14:22:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2024-11-06 14:22:36,736 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 63 [2024-11-06 14:22:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:36,736 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2024-11-06 14:22:36,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2024-11-06 14:22:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2024-11-06 14:22:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-06 14:22:36,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:36,737 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:22:36,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-06 14:22:36,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:36,938 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:36,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash 699975361, now seen corresponding path program 1 times [2024-11-06 14:22:36,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:36,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591443672] [2024-11-06 14:22:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:36,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:36,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:36,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:36,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-06 14:22:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:37,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-06 14:22:37,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:37,061 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 15 treesize of output 1 [2024-11-06 14:22:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-06 14:22:37,560 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:22:37,560 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591443672] [2024-11-06 14:22:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591443672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:22:37,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:22:37,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-06 14:22:37,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225323424] [2024-11-06 14:22:37,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:37,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-06 14:22:37,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-06 14:22:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-06 14:22:37,561 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-06 14:22:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:38,354 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2024-11-06 14:22:38,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-06 14:22:38,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2024-11-06 14:22:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:38,355 INFO L225 Difference]: With dead ends: 102 [2024-11-06 14:22:38,355 INFO L226 Difference]: Without dead ends: 75 [2024-11-06 14:22:38,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-06 14:22:38,356 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:38,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 155 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-06 14:22:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-06 14:22:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-06 14:22:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.12) internal successors, (56), 54 states have internal predecessors, (56), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-06 14:22:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-11-06 14:22:38,367 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 63 [2024-11-06 14:22:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:38,367 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-11-06 14:22:38,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-06 14:22:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-11-06 14:22:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-06 14:22:38,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:38,368 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:22:38,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-06 14:22:38,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:38,569 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:38,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash 306948351, now seen corresponding path program 1 times [2024-11-06 14:22:38,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:38,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346744881] [2024-11-06 14:22:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:38,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:38,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:38,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-06 14:22:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:38,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-06 14:22:38,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-06 14:22:38,732 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 14:22:38,732 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:38,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346744881] [2024-11-06 14:22:38,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346744881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 14:22:38,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 14:22:38,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-06 14:22:38,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602921951] [2024-11-06 14:22:38,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 14:22:38,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-06 14:22:38,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:38,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-06 14:22:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-06 14:22:38,734 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-06 14:22:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:38,758 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2024-11-06 14:22:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 14:22:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 63 [2024-11-06 14:22:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:38,759 INFO L225 Difference]: With dead ends: 103 [2024-11-06 14:22:38,759 INFO L226 Difference]: Without dead ends: 66 [2024-11-06 14:22:38,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-06 14:22:38,759 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:38,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 14:22:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-06 14:22:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-06 14:22:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-06 14:22:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2024-11-06 14:22:38,771 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 63 [2024-11-06 14:22:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:38,771 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2024-11-06 14:22:38,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-06 14:22:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2024-11-06 14:22:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-06 14:22:38,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:38,772 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:22:38,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-06 14:22:38,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:38,974 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:38,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash 424365179, now seen corresponding path program 1 times [2024-11-06 14:22:38,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:38,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478135874] [2024-11-06 14:22:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:38,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:38,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:38,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-06 14:22:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:39,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-06 14:22:39,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:39,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 14:22:39,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 14:22:39,100 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 23 treesize of output 15 [2024-11-06 14:22:39,106 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 23 treesize of output 15 [2024-11-06 14:22:40,638 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-06 14:22:40,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 123 [2024-11-06 14:22:40,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 14:22:40,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 67 [2024-11-06 14:22:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-06 14:22:40,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:22:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-06 14:22:46,036 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:22:46,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478135874] [2024-11-06 14:22:46,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478135874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:22:46,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:22:46,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2024-11-06 14:22:46,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111461508] [2024-11-06 14:22:46,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:22:46,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-06 14:22:46,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:22:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-06 14:22:46,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=824, Unknown=1, NotChecked=0, Total=930 [2024-11-06 14:22:46,037 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 31 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 25 states have internal predecessors, (71), 10 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-06 14:22:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:22:48,446 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2024-11-06 14:22:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-06 14:22:48,446 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 25 states have internal predecessors, (71), 10 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 77 [2024-11-06 14:22:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:22:48,447 INFO L225 Difference]: With dead ends: 77 [2024-11-06 14:22:48,447 INFO L226 Difference]: Without dead ends: 75 [2024-11-06 14:22:48,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 109 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=139, Invalid=1050, Unknown=1, NotChecked=0, Total=1190 [2024-11-06 14:22:48,447 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-06 14:22:48,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 388 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-06 14:22:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-06 14:22:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2024-11-06 14:22:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 52 states have internal predecessors, (53), 13 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-06 14:22:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2024-11-06 14:22:48,459 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 77 [2024-11-06 14:22:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:22:48,459 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2024-11-06 14:22:48,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 25 states have internal predecessors, (71), 10 states have call successors, (22), 4 states have call predecessors, (22), 6 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-06 14:22:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2024-11-06 14:22:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-06 14:22:48,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:22:48,460 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2024-11-06 14:22:48,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-06 14:22:48,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:48,661 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:22:48,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:22:48,661 INFO L85 PathProgramCache]: Analyzing trace with hash -384981447, now seen corresponding path program 1 times [2024-11-06 14:22:48,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:22:48,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737680486] [2024-11-06 14:22:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:22:48,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:22:48,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:22:48,666 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:22:48,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-06 14:22:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:22:48,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-06 14:22:48,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:22:52,901 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset_BEFORE_CALL_38| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base_BEFORE_CALL_47| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base_BEFORE_CALL_47|) |v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset_BEFORE_CALL_38|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset_BEFORE_CALL_38| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base_BEFORE_CALL_47| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base_BEFORE_CALL_47|) |v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset_BEFORE_CALL_38|))))) is different from true [2024-11-06 14:22:56,982 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset_BEFORE_CALL_39| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base_BEFORE_CALL_48| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base_BEFORE_CALL_48|) |v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset_BEFORE_CALL_39|) (_ bv0 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset_BEFORE_CALL_39| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base_BEFORE_CALL_48| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base_BEFORE_CALL_48|) |v_ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset_BEFORE_CALL_39|))))) is different from true [2024-11-06 14:23:01,123 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_7| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_7| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_7|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_7| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_7| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_7|))))) is different from true [2024-11-06 14:23:05,230 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_8| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_8| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_8|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_8| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_8| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_8|))))) is different from true [2024-11-06 14:23:09,338 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_9| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_9| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_9|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_9| (_ BitVec 64)) (|v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_9| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset_BEFORE_CALL_9|))))) is different from true [2024-11-06 14:23:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 12 not checked. [2024-11-06 14:23:14,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:23:14,746 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-06 14:23:14,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2024-11-06 14:23:14,759 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-11-06 14:23:14,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2024-11-06 14:23:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-06 14:23:14,772 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:23:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737680486] [2024-11-06 14:23:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737680486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:23:14,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:23:14,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 24 [2024-11-06 14:23:14,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491114847] [2024-11-06 14:23:14,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:23:14,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-06 14:23:14,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:23:14,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-06 14:23:14,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=289, Unknown=6, NotChecked=190, Total=552 [2024-11-06 14:23:14,773 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 4 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-06 14:23:18,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:23:23,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:23:31,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 14:23:36,698 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] [2024-11-06 14:23:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:23:38,403 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2024-11-06 14:23:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-06 14:23:38,403 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 4 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 77 [2024-11-06 14:23:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:23:38,404 INFO L225 Difference]: With dead ends: 105 [2024-11-06 14:23:38,404 INFO L226 Difference]: Without dead ends: 85 [2024-11-06 14:23:38,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=152, Invalid=617, Unknown=7, NotChecked=280, Total=1056 [2024-11-06 14:23:38,405 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 26 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2024-11-06 14:23:38,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 485 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 4 Unknown, 739 Unchecked, 16.7s Time] [2024-11-06 14:23:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-06 14:23:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2024-11-06 14:23:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 59 states have internal predecessors, (60), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-06 14:23:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2024-11-06 14:23:38,418 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 77 [2024-11-06 14:23:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:23:38,419 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2024-11-06 14:23:38,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 4 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-06 14:23:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2024-11-06 14:23:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-06 14:23:38,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:23:38,419 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2024-11-06 14:23:38,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-06 14:23:38,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:23:38,620 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:23:38,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:23:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash -778008457, now seen corresponding path program 1 times [2024-11-06 14:23:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:23:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407795924] [2024-11-06 14:23:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:23:38,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:23:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:23:38,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:23:38,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-06 14:23:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:23:38,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-06 14:23:38,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:23:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-06 14:23:38,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:23:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-06 14:23:39,154 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:23:39,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407795924] [2024-11-06 14:23:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407795924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:23:39,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:23:39,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2024-11-06 14:23:39,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060381747] [2024-11-06 14:23:39,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:23:39,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-06 14:23:39,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:23:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-06 14:23:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-06 14:23:39,156 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-06 14:23:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:23:39,278 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2024-11-06 14:23:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-06 14:23:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2024-11-06 14:23:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:23:39,279 INFO L225 Difference]: With dead ends: 96 [2024-11-06 14:23:39,279 INFO L226 Difference]: Without dead ends: 72 [2024-11-06 14:23:39,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-06 14:23:39,280 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 14:23:39,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 302 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 14:23:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-06 14:23:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-11-06 14:23:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.0) internal successors, (48), 48 states have internal predecessors, (48), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-06 14:23:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2024-11-06 14:23:39,291 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 77 [2024-11-06 14:23:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:23:39,292 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2024-11-06 14:23:39,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-06 14:23:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2024-11-06 14:23:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-06 14:23:39,292 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 14:23:39,292 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2024-11-06 14:23:39,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-06 14:23:39,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:23:39,494 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 14:23:39,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 14:23:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash -814494378, now seen corresponding path program 1 times [2024-11-06 14:23:39,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 14:23:39,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017617114] [2024-11-06 14:23:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 14:23:39,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:23:39,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 14:23:39,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 14:23:39,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-06 14:23:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 14:23:39,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-06 14:23:39,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 14:23:39,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 14:23:39,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 14:23:40,012 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 22 treesize of output 10 [2024-11-06 14:23:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-06 14:23:40,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 14:23:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-06 14:23:40,712 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 14:23:40,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017617114] [2024-11-06 14:23:40,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017617114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 14:23:40,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 14:23:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2024-11-06 14:23:40,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245317983] [2024-11-06 14:23:40,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 14:23:40,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-06 14:23:40,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 14:23:40,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-06 14:23:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-06 14:23:40,714 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-06 14:23:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 14:23:41,287 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-11-06 14:23:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-06 14:23:41,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 83 [2024-11-06 14:23:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 14:23:41,288 INFO L225 Difference]: With dead ends: 70 [2024-11-06 14:23:41,288 INFO L226 Difference]: Without dead ends: 0 [2024-11-06 14:23:41,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2024-11-06 14:23:41,289 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-06 14:23:41,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 331 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-06 14:23:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-06 14:23:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-06 14:23:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-06 14:23:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-06 14:23:41,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2024-11-06 14:23:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 14:23:41,290 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-06 14:23:41,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-06 14:23:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-06 14:23:41,290 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-06 14:23:41,292 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-06 14:23:41,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-06 14:23:41,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 14:23:41,496 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 14:23:41,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.