/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_back_harness_negated.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 15:06:59,679 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 15:06:59,754 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-04 15:06:59,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 15:06:59,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 15:06:59,775 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 15:06:59,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 15:06:59,775 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 15:06:59,776 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 15:06:59,776 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 15:06:59,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 15:06:59,776 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 15:06:59,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 15:06:59,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 15:06:59,778 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 15:06:59,778 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 15:06:59,779 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 15:06:59,779 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 15:06:59,779 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 15:06:59,779 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 15:06:59,780 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 15:06:59,782 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 15:06:59,783 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 15:06:59,783 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 15:06:59,783 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 15:06:59,783 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 15:06:59,783 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 15:06:59,783 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 15:06:59,784 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 15:06:59,784 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 15:06:59,784 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 15:06:59,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 15:06:59,784 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 15:06:59,784 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 15:06:59,784 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 15:06:59,785 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 15:06:59,785 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 15:06:59,785 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 15:06:59,785 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 15:06:59,785 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 15:06:59,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 15:06:59,786 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:06:59,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 15:07:00,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 15:07:00,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 15:07:00,022 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 15:07:00,023 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 15:07:00,024 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_back_harness_negated.i [2024-11-04 15:07:01,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 15:07:01,748 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 15:07:01,750 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_back_harness_negated.i [2024-11-04 15:07:01,784 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c468b272c/19e0ef85182e4e4faf58665de190fdce/FLAGba9160bbd [2024-11-04 15:07:01,805 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c468b272c/19e0ef85182e4e4faf58665de190fdce [2024-11-04 15:07:01,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 15:07:01,809 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 15:07:01,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 15:07:01,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 15:07:01,817 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 15:07:01,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:07:01" (1/1) ... [2024-11-04 15:07:01,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ba345b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:01, skipping insertion in model container [2024-11-04 15:07:01,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:07:01" (1/1) ... [2024-11-04 15:07:01,930 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 15:07:02,170 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_back_harness_negated.i[4494,4507] [2024-11-04 15:07:02,176 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_back_harness_negated.i[4554,4567] [2024-11-04 15:07:02,530 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,615 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,616 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,616 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,627 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,629 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,630 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,630 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,631 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,631 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,632 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,634 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,634 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,637 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,637 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,648 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,648 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,649 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,649 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,650 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,651 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,651 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,651 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,652 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,654 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,654 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,654 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,655 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,655 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:02,938 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,939 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,939 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:02,939 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,064 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:03,109 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-04 15:07:03,143 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 15:07:03,149 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_back_harness_negated.i[4494,4507] [2024-11-04 15:07:03,149 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_back_harness_negated.i[4554,4567] [2024-11-04 15:07:03,182 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,205 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,206 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,206 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,212 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,213 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,213 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,213 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,213 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,214 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,217 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,222 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,222 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,223 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,223 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,230 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,231 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,231 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,231 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,232 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,232 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,232 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,232 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,233 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,233 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,233 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,233 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,234 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,234 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,270 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,271 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,271 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,271 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,299 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:03,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:03,310 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 15:07:03,320 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_back_harness_negated.i[4494,4507] [2024-11-04 15:07:03,325 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_back_harness_negated.i[4554,4567] [2024-11-04 15:07:03,384 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,384 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,385 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,385 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,389 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,394 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,394 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,395 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,395 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,396 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,396 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,398 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,398 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:03,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:03,583 WARN L710 CHandler]: The following functions are not defined or handled internally: aws_array_list_ensure_capacity [2024-11-04 15:07:03,591 INFO L204 MainTranslator]: Completed translation [2024-11-04 15:07:03,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03 WrapperNode [2024-11-04 15:07:03,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 15:07:03,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 15:07:03,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 15:07:03,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 15:07:03,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,723 INFO L138 Inliner]: procedures = 687, calls = 1043, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 136 [2024-11-04 15:07:03,723 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 15:07:03,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 15:07:03,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 15:07:03,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 15:07:03,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,745 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,781 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 5, 20]. 74 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 6 writes are split as follows [0, 0, 6]. [2024-11-04 15:07:03,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,810 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,822 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,832 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 15:07:03,833 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 15:07:03,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 15:07:03,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 15:07:03,837 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (1/1) ... [2024-11-04 15:07:03,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 15:07:03,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:03,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-04 15:07:03,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-04 15:07:03,890 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_back [2024-11-04 15:07:03,890 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_back [2024-11-04 15:07:03,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-04 15:07:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 15:07:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-04 15:07:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-04 15:07:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-04 15:07:03,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-04 15:07:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-04 15:07:03,891 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-04 15:07:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-04 15:07:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2024-11-04 15:07:03,891 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 15:07:03,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2024-11-04 15:07:03,892 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-04 15:07:03,892 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-04 15:07:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-04 15:07:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-11-04 15:07:03,893 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-11-04 15:07:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2024-11-04 15:07:03,893 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2024-11-04 15:07:04,102 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 15:07:04,104 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 15:07:04,512 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-04 15:07:04,513 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 15:07:04,528 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 15:07:04,528 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-04 15:07:04,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:07:04 BoogieIcfgContainer [2024-11-04 15:07:04,529 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 15:07:04,531 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 15:07:04,531 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 15:07:04,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 15:07:04,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 03:07:01" (1/3) ... [2024-11-04 15:07:04,536 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17758970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:07:04, skipping insertion in model container [2024-11-04 15:07:04,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:03" (2/3) ... [2024-11-04 15:07:04,536 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17758970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:07:04, skipping insertion in model container [2024-11-04 15:07:04,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:07:04" (3/3) ... [2024-11-04 15:07:04,538 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_back_harness_negated.i [2024-11-04 15:07:04,552 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 15:07:04,552 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 15:07:04,602 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 15:07:04,609 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;@25c2fb0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 15:07:04,609 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 15:07:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-04 15:07:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-04 15:07:04,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:04,628 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:04,628 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:04,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:04,633 INFO L85 PathProgramCache]: Analyzing trace with hash -722894815, now seen corresponding path program 1 times [2024-11-04 15:07:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:04,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443296277] [2024-11-04 15:07:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:04,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:04,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:04,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:04,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-04 15:07:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:04,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-04 15:07:04,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-04 15:07:04,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-04 15:07:04,942 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443296277] [2024-11-04 15:07:04,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443296277] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:04,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:04,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-04 15:07:04,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527390767] [2024-11-04 15:07:04,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:04,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-04 15:07:04,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-04 15:07:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 15:07:04,967 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-04 15:07:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:04,995 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2024-11-04 15:07:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-04 15:07:04,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2024-11-04 15:07:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:05,005 INFO L225 Difference]: With dead ends: 188 [2024-11-04 15:07:05,005 INFO L226 Difference]: Without dead ends: 93 [2024-11-04 15:07:05,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 15:07:05,013 INFO L432 NwaCegarLoop]: 127 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, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:05,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-04 15:07:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-04 15:07:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-04 15:07:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2024-11-04 15:07:05,050 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2024-11-04 15:07:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:05,050 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2024-11-04 15:07:05,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-04 15:07:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2024-11-04 15:07:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-04 15:07:05,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:05,059 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:05,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-04 15:07:05,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:05,261 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:05,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash -723996839, now seen corresponding path program 1 times [2024-11-04 15:07:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:05,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255664747] [2024-11-04 15:07:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:05,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:05,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-04 15:07:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:05,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 15:07:05,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-04 15:07:05,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-04 15:07:05,572 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:05,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255664747] [2024-11-04 15:07:05,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255664747] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:05,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:05,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2024-11-04 15:07:05,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912166240] [2024-11-04 15:07:05,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:05,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 15:07:05,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 15:07:05,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-04 15:07:05,575 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-04 15:07:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:05,690 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2024-11-04 15:07:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 15:07:05,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2024-11-04 15:07:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:05,693 INFO L225 Difference]: With dead ends: 169 [2024-11-04 15:07:05,693 INFO L226 Difference]: Without dead ends: 95 [2024-11-04 15:07:05,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-04 15:07:05,695 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:05,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 15:07:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-04 15:07:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-04 15:07:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-04 15:07:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2024-11-04 15:07:05,705 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 84 [2024-11-04 15:07:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:05,706 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2024-11-04 15:07:05,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-04 15:07:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2024-11-04 15:07:05,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-04 15:07:05,710 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:05,710 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:05,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-04 15:07:05,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:05,911 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:05,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2086865941, now seen corresponding path program 1 times [2024-11-04 15:07:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:05,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992594698] [2024-11-04 15:07:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:05,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:05,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:05,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:05,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-04 15:07:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:06,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-04 15:07:06,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-04 15:07:06,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-04 15:07:06,333 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:06,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992594698] [2024-11-04 15:07:06,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [992594698] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:06,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:06,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2024-11-04 15:07:06,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375586456] [2024-11-04 15:07:06,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:06,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 15:07:06,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:06,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 15:07:06,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-04 15:07:06,335 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-04 15:07:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:06,500 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2024-11-04 15:07:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-04 15:07:06,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2024-11-04 15:07:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:06,503 INFO L225 Difference]: With dead ends: 176 [2024-11-04 15:07:06,503 INFO L226 Difference]: Without dead ends: 97 [2024-11-04 15:07:06,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-04 15:07:06,504 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 32 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:06,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 681 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 15:07:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-04 15:07:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-11-04 15:07:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 63 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-04 15:07:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2024-11-04 15:07:06,516 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 86 [2024-11-04 15:07:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:06,516 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2024-11-04 15:07:06,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-04 15:07:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2024-11-04 15:07:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-04 15:07:06,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:06,517 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:06,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:06,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:06,719 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:06,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1429995906, now seen corresponding path program 1 times [2024-11-04 15:07:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885846961] [2024-11-04 15:07:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:06,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:06,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:06,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:06,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-04 15:07:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:06,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-04 15:07:06,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-04 15:07:06,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-04 15:07:07,090 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:07,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885846961] [2024-11-04 15:07:07,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [885846961] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:07,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:07,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 12 [2024-11-04 15:07:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632682621] [2024-11-04 15:07:07,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:07,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-04 15:07:07,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-04 15:07:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-04 15:07:07,092 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-04 15:07:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:07,358 INFO L93 Difference]: Finished difference Result 182 states and 241 transitions. [2024-11-04 15:07:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-04 15:07:07,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2024-11-04 15:07:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:07,360 INFO L225 Difference]: With dead ends: 182 [2024-11-04 15:07:07,360 INFO L226 Difference]: Without dead ends: 102 [2024-11-04 15:07:07,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-04 15:07:07,362 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 41 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:07,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 765 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 15:07:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-04 15:07:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2024-11-04 15:07:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-04 15:07:07,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2024-11-04 15:07:07,380 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 88 [2024-11-04 15:07:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:07,380 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2024-11-04 15:07:07,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-04 15:07:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2024-11-04 15:07:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-04 15:07:07,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:07,382 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:07,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:07,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:07,586 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:07,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1848432154, now seen corresponding path program 1 times [2024-11-04 15:07:07,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:07,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768165635] [2024-11-04 15:07:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:07,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:07,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:07,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:07,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-04 15:07:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:07,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 15:07:07,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-04 15:07:07,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-04 15:07:07,781 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768165635] [2024-11-04 15:07:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768165635] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:07,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:07,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2024-11-04 15:07:07,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238705965] [2024-11-04 15:07:07,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:07,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-04 15:07:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-04 15:07:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:07,783 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-04 15:07:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:07,802 INFO L93 Difference]: Finished difference Result 177 states and 236 transitions. [2024-11-04 15:07:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-04 15:07:07,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 89 [2024-11-04 15:07:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:07,806 INFO L225 Difference]: With dead ends: 177 [2024-11-04 15:07:07,806 INFO L226 Difference]: Without dead ends: 100 [2024-11-04 15:07:07,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:07,807 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:07,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 231 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-04 15:07:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2024-11-04 15:07:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-04 15:07:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2024-11-04 15:07:07,815 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 89 [2024-11-04 15:07:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:07,815 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2024-11-04 15:07:07,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-04 15:07:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2024-11-04 15:07:07,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-04 15:07:07,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:07,817 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:07,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-04 15:07:08,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:08,017 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:08,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:08,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2017477272, now seen corresponding path program 1 times [2024-11-04 15:07:08,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:08,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305522866] [2024-11-04 15:07:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:08,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:08,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:08,026 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:08,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-04 15:07:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:08,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-04 15:07:08,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-04 15:07:08,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-04 15:07:08,270 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305522866] [2024-11-04 15:07:08,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305522866] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:08,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:08,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2024-11-04 15:07:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538277011] [2024-11-04 15:07:08,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:08,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-04 15:07:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:08,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-04 15:07:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:08,271 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-04 15:07:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:08,348 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2024-11-04 15:07:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-04 15:07:08,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 97 [2024-11-04 15:07:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:08,351 INFO L225 Difference]: With dead ends: 178 [2024-11-04 15:07:08,351 INFO L226 Difference]: Without dead ends: 100 [2024-11-04 15:07:08,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:08,352 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:08,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 666 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-04 15:07:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-11-04 15:07:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-11-04 15:07:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2024-11-04 15:07:08,369 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 97 [2024-11-04 15:07:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:08,370 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2024-11-04 15:07:08,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-04 15:07:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2024-11-04 15:07:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-04 15:07:08,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:08,371 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:08,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:08,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:08,572 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:08,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash -63854059, now seen corresponding path program 1 times [2024-11-04 15:07:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:08,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528714295] [2024-11-04 15:07:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:08,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:08,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:08,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:08,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-04 15:07:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:08,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-04 15:07:08,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:08,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-04 15:07:08,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-04 15:07:13,125 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$#2.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) (_ bv0 64)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|))))) is different from true [2024-11-04 15:07:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-04 15:07:13,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-04 15:07:13,568 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:13,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528714295] [2024-11-04 15:07:13,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1528714295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:07:13,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:07:13,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2024-11-04 15:07:13,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117468808] [2024-11-04 15:07:13,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:07:13,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-04 15:07:13,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:13,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-04 15:07:13,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2024-11-04 15:07:13,570 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-04 15:07:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:14,496 INFO L93 Difference]: Finished difference Result 221 states and 300 transitions. [2024-11-04 15:07:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-04 15:07:14,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 99 [2024-11-04 15:07:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:14,498 INFO L225 Difference]: With dead ends: 221 [2024-11-04 15:07:14,498 INFO L226 Difference]: Without dead ends: 142 [2024-11-04 15:07:14,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=76, Invalid=347, Unknown=1, NotChecked=38, Total=462 [2024-11-04 15:07:14,499 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 67 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:14,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1104 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 382 Invalid, 0 Unknown, 308 Unchecked, 0.7s Time] [2024-11-04 15:07:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-04 15:07:14,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 116. [2024-11-04 15:07:14,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 80 states have (on average 1.25) internal successors, (100), 82 states have internal predecessors, (100), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-04 15:07:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 152 transitions. [2024-11-04 15:07:14,515 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 152 transitions. Word has length 99 [2024-11-04 15:07:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:14,516 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 152 transitions. [2024-11-04 15:07:14,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 5 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-04 15:07:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 152 transitions. [2024-11-04 15:07:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-04 15:07:14,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:14,517 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:14,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:14,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:14,719 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:14,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1897720599, now seen corresponding path program 1 times [2024-11-04 15:07:14,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:14,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897080875] [2024-11-04 15:07:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:14,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:14,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:14,722 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:14,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-04 15:07:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:14,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-04 15:07:14,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-04 15:07:14,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-04 15:07:14,944 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:14,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897080875] [2024-11-04 15:07:14,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897080875] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:14,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:14,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-04 15:07:14,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623935031] [2024-11-04 15:07:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:14,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 15:07:14,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:14,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 15:07:14,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:14,945 INFO L87 Difference]: Start difference. First operand 116 states and 152 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-04 15:07:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:14,968 INFO L93 Difference]: Finished difference Result 214 states and 286 transitions. [2024-11-04 15:07:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 15:07:14,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 99 [2024-11-04 15:07:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:14,970 INFO L225 Difference]: With dead ends: 214 [2024-11-04 15:07:14,970 INFO L226 Difference]: Without dead ends: 117 [2024-11-04 15:07:14,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:14,971 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:14,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-04 15:07:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2024-11-04 15:07:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 80 states have (on average 1.2375) internal successors, (99), 82 states have internal predecessors, (99), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-04 15:07:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2024-11-04 15:07:14,980 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 99 [2024-11-04 15:07:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:14,980 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2024-11-04 15:07:14,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-04 15:07:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2024-11-04 15:07:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-04 15:07:14,981 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:14,981 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:14,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-04 15:07:15,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:15,182 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:15,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1836546919, now seen corresponding path program 1 times [2024-11-04 15:07:15,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:15,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805571294] [2024-11-04 15:07:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:15,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:15,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:15,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:15,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-04 15:07:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:15,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-04 15:07:15,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-04 15:07:15,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-04 15:07:15,386 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:15,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805571294] [2024-11-04 15:07:15,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [805571294] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:15,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:15,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-04 15:07:15,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901572935] [2024-11-04 15:07:15,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:15,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 15:07:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:15,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 15:07:15,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:15,388 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-04 15:07:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:15,415 INFO L93 Difference]: Finished difference Result 213 states and 285 transitions. [2024-11-04 15:07:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 15:07:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 99 [2024-11-04 15:07:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:15,417 INFO L225 Difference]: With dead ends: 213 [2024-11-04 15:07:15,417 INFO L226 Difference]: Without dead ends: 116 [2024-11-04 15:07:15,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:15,418 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:15,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 352 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-04 15:07:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-11-04 15:07:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-04 15:07:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2024-11-04 15:07:15,435 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 99 [2024-11-04 15:07:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:15,435 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2024-11-04 15:07:15,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-04 15:07:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2024-11-04 15:07:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-04 15:07:15,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:15,436 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:15,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-04 15:07:15,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:15,637 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:15,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:15,638 INFO L85 PathProgramCache]: Analyzing trace with hash -913140813, now seen corresponding path program 1 times [2024-11-04 15:07:15,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:15,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384308025] [2024-11-04 15:07:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:15,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:15,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:15,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:15,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-04 15:07:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:15,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 15:07:15,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-04 15:07:15,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-04 15:07:15,879 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:15,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384308025] [2024-11-04 15:07:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [384308025] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:15,879 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:15,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-11-04 15:07:15,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420139491] [2024-11-04 15:07:15,879 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:15,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 15:07:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 15:07:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:15,880 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2024-11-04 15:07:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:15,917 INFO L93 Difference]: Finished difference Result 123 states and 157 transitions. [2024-11-04 15:07:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 15:07:15,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 100 [2024-11-04 15:07:15,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:15,919 INFO L225 Difference]: With dead ends: 123 [2024-11-04 15:07:15,919 INFO L226 Difference]: Without dead ends: 121 [2024-11-04 15:07:15,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-04 15:07:15,920 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 3 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:15,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 693 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-04 15:07:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2024-11-04 15:07:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 84 states have internal predecessors, (98), 26 states have call successors, (26), 10 states have call predecessors, (26), 12 states have return successors, (30), 25 states have call predecessors, (30), 25 states have call successors, (30) [2024-11-04 15:07:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 154 transitions. [2024-11-04 15:07:15,929 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 154 transitions. Word has length 100 [2024-11-04 15:07:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:15,929 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 154 transitions. [2024-11-04 15:07:15,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2024-11-04 15:07:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 154 transitions. [2024-11-04 15:07:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-04 15:07:15,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:15,930 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:15,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:16,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:16,131 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:16,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash 6552534, now seen corresponding path program 1 times [2024-11-04 15:07:16,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:16,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550674916] [2024-11-04 15:07:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:16,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:16,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:16,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-04 15:07:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:16,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-04 15:07:16,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-04 15:07:16,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-04 15:07:16,399 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:16,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550674916] [2024-11-04 15:07:16,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [550674916] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:16,399 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:16,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2024-11-04 15:07:16,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540827442] [2024-11-04 15:07:16,399 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:16,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-04 15:07:16,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-04 15:07:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-04 15:07:16,401 INFO L87 Difference]: Start difference. First operand 120 states and 154 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2024-11-04 15:07:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:16,451 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2024-11-04 15:07:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-04 15:07:16,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 113 [2024-11-04 15:07:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:16,453 INFO L225 Difference]: With dead ends: 128 [2024-11-04 15:07:16,453 INFO L226 Difference]: Without dead ends: 126 [2024-11-04 15:07:16,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-04 15:07:16,454 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 3 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:16,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 918 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-04 15:07:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2024-11-04 15:07:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 80 states have (on average 1.2125) internal successors, (97), 82 states have internal predecessors, (97), 26 states have call successors, (26), 10 states have call predecessors, (26), 11 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2024-11-04 15:07:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 151 transitions. [2024-11-04 15:07:16,462 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 151 transitions. Word has length 113 [2024-11-04 15:07:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:16,463 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 151 transitions. [2024-11-04 15:07:16,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2024-11-04 15:07:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 151 transitions. [2024-11-04 15:07:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-04 15:07:16,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:16,464 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:16,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-04 15:07:16,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:16,665 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:16,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:16,665 INFO L85 PathProgramCache]: Analyzing trace with hash -804027763, now seen corresponding path program 1 times [2024-11-04 15:07:16,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:16,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308320387] [2024-11-04 15:07:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:16,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:16,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:16,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:16,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-04 15:07:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:16,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-04 15:07:16,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:16,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-04 15:07:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-04 15:07:17,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:18,461 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-04 15:07:18,461 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 34 treesize of output 1 [2024-11-04 15:07:18,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 15:07:18,618 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 26 treesize of output 29 [2024-11-04 15:07:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-04 15:07:19,145 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:19,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308320387] [2024-11-04 15:07:19,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308320387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:07:19,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:07:19,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 27 [2024-11-04 15:07:19,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455235311] [2024-11-04 15:07:19,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:07:19,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-04 15:07:19,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-04 15:07:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2024-11-04 15:07:19,147 INFO L87 Difference]: Start difference. First operand 118 states and 151 transitions. Second operand has 27 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 13 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-04 15:07:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:22,190 INFO L93 Difference]: Finished difference Result 322 states and 416 transitions. [2024-11-04 15:07:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-04 15:07:22,191 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 13 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) Word has length 116 [2024-11-04 15:07:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:22,195 INFO L225 Difference]: With dead ends: 322 [2024-11-04 15:07:22,196 INFO L226 Difference]: Without dead ends: 223 [2024-11-04 15:07:22,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2024-11-04 15:07:22,199 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 137 mSDsluCounter, 1938 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2087 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:22,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 2087 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-04 15:07:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-04 15:07:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 197. [2024-11-04 15:07:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 138 states have (on average 1.2463768115942029) internal successors, (172), 141 states have internal predecessors, (172), 40 states have call successors, (40), 15 states have call predecessors, (40), 18 states have return successors, (45), 40 states have call predecessors, (45), 38 states have call successors, (45) [2024-11-04 15:07:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 257 transitions. [2024-11-04 15:07:22,226 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 257 transitions. Word has length 116 [2024-11-04 15:07:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:22,226 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 257 transitions. [2024-11-04 15:07:22,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 13 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-04 15:07:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 257 transitions. [2024-11-04 15:07:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-04 15:07:22,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:22,232 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-04 15:07:22,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-04 15:07:22,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:22,433 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:22,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:22,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2073438332, now seen corresponding path program 1 times [2024-11-04 15:07:22,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:22,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914585610] [2024-11-04 15:07:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:22,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:22,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:22,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:22,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-04 15:07:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:22,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-04 15:07:22,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-04 15:07:23,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:23,404 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-04 15:07:23,405 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 [2024-11-04 15:07:23,418 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-11-04 15:07:23,418 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 [2024-11-04 15:07:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-04 15:07:23,439 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:23,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914585610] [2024-11-04 15:07:23,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [914585610] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:23,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:23,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2024-11-04 15:07:23,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283815349] [2024-11-04 15:07:23,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:23,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 15:07:23,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:23,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 15:07:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-04 15:07:23,441 INFO L87 Difference]: Start difference. First operand 197 states and 257 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-04 15:07:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:24,142 INFO L93 Difference]: Finished difference Result 416 states and 566 transitions. [2024-11-04 15:07:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-04 15:07:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 126 [2024-11-04 15:07:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:24,144 INFO L225 Difference]: With dead ends: 416 [2024-11-04 15:07:24,144 INFO L226 Difference]: Without dead ends: 238 [2024-11-04 15:07:24,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-04 15:07:24,145 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 15 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:24,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 708 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-04 15:07:24,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-04 15:07:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 209. [2024-11-04 15:07:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 148 states have (on average 1.25) internal successors, (185), 152 states have internal predecessors, (185), 40 states have call successors, (40), 15 states have call predecessors, (40), 20 states have return successors, (51), 41 states have call predecessors, (51), 38 states have call successors, (51) [2024-11-04 15:07:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 276 transitions. [2024-11-04 15:07:24,159 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 276 transitions. Word has length 126 [2024-11-04 15:07:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:24,160 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 276 transitions. [2024-11-04 15:07:24,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-04 15:07:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 276 transitions. [2024-11-04 15:07:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-04 15:07:24,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:24,161 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:24,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-04 15:07:24,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:24,365 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:24,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:24,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2019045434, now seen corresponding path program 1 times [2024-11-04 15:07:24,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:24,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146010064] [2024-11-04 15:07:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:24,368 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:24,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-04 15:07:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:24,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 15:07:24,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-04 15:07:24,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-04 15:07:24,595 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:24,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146010064] [2024-11-04 15:07:24,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1146010064] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:24,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:24,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2024-11-04 15:07:24,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477676727] [2024-11-04 15:07:24,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:24,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-04 15:07:24,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:24,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-04 15:07:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-04 15:07:24,597 INFO L87 Difference]: Start difference. First operand 209 states and 276 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-04 15:07:24,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:24,622 INFO L93 Difference]: Finished difference Result 409 states and 556 transitions. [2024-11-04 15:07:24,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-04 15:07:24,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 126 [2024-11-04 15:07:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:24,626 INFO L225 Difference]: With dead ends: 409 [2024-11-04 15:07:24,626 INFO L226 Difference]: Without dead ends: 219 [2024-11-04 15:07:24,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-04 15:07:24,627 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 0 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:24,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 489 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-04 15:07:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2024-11-04 15:07:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 154 states have (on average 1.2402597402597402) internal successors, (191), 158 states have internal predecessors, (191), 40 states have call successors, (40), 15 states have call predecessors, (40), 22 states have return successors, (59), 43 states have call predecessors, (59), 38 states have call successors, (59) [2024-11-04 15:07:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 290 transitions. [2024-11-04 15:07:24,643 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 290 transitions. Word has length 126 [2024-11-04 15:07:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:24,643 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 290 transitions. [2024-11-04 15:07:24,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-04 15:07:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 290 transitions. [2024-11-04 15:07:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-04 15:07:24,645 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:24,645 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:24,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-04 15:07:24,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:24,845 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:24,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:24,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1341470906, now seen corresponding path program 1 times [2024-11-04 15:07:24,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:24,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529821707] [2024-11-04 15:07:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:24,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:24,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:24,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:24,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-04 15:07:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:25,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-04 15:07:25,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-04 15:07:25,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-04 15:07:25,112 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:25,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529821707] [2024-11-04 15:07:25,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1529821707] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:25,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:25,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-04 15:07:25,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724760272] [2024-11-04 15:07:25,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:25,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 15:07:25,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 15:07:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:25,113 INFO L87 Difference]: Start difference. First operand 217 states and 290 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-04 15:07:25,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:25,143 INFO L93 Difference]: Finished difference Result 405 states and 552 transitions. [2024-11-04 15:07:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 15:07:25,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 126 [2024-11-04 15:07:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:25,147 INFO L225 Difference]: With dead ends: 405 [2024-11-04 15:07:25,147 INFO L226 Difference]: Without dead ends: 207 [2024-11-04 15:07:25,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:25,149 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 0 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:25,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-04 15:07:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2024-11-04 15:07:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 146 states have (on average 1.2123287671232876) internal successors, (177), 150 states have internal predecessors, (177), 40 states have call successors, (40), 15 states have call predecessors, (40), 20 states have return successors, (51), 41 states have call predecessors, (51), 38 states have call successors, (51) [2024-11-04 15:07:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 268 transitions. [2024-11-04 15:07:25,166 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 268 transitions. Word has length 126 [2024-11-04 15:07:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:25,167 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 268 transitions. [2024-11-04 15:07:25,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-04 15:07:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 268 transitions. [2024-11-04 15:07:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-04 15:07:25,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:25,168 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-04 15:07:25,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:25,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:25,368 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:25,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:25,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1281188000, now seen corresponding path program 2 times [2024-11-04 15:07:25,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:25,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997970365] [2024-11-04 15:07:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:25,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:25,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:25,370 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:25,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-04 15:07:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:25,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-04 15:07:25,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:25,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2024-11-04 15:07:25,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-04 15:07:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 79 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-04 15:07:28,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-04 15:07:30,385 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:30,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997970365] [2024-11-04 15:07:30,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [997970365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:07:30,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:07:30,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2024-11-04 15:07:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920451350] [2024-11-04 15:07:30,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:07:30,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-04 15:07:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-04 15:07:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-11-04 15:07:30,387 INFO L87 Difference]: Start difference. First operand 207 states and 268 transitions. Second operand has 31 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 15 states have call successors, (30), 5 states have call predecessors, (30), 7 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2024-11-04 15:07:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:38,341 INFO L93 Difference]: Finished difference Result 537 states and 678 transitions. [2024-11-04 15:07:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-04 15:07:38,345 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 15 states have call successors, (30), 5 states have call predecessors, (30), 7 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) Word has length 127 [2024-11-04 15:07:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:38,347 INFO L225 Difference]: With dead ends: 537 [2024-11-04 15:07:38,347 INFO L226 Difference]: Without dead ends: 427 [2024-11-04 15:07:38,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 213 SyntacticMatches, 11 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=413, Invalid=2239, Unknown=0, NotChecked=0, Total=2652 [2024-11-04 15:07:38,353 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 254 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:38,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1739 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-04 15:07:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-04 15:07:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 376. [2024-11-04 15:07:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 277 states have (on average 1.1913357400722022) internal successors, (330), 283 states have internal predecessors, (330), 61 states have call successors, (61), 29 states have call predecessors, (61), 37 states have return successors, (78), 63 states have call predecessors, (78), 58 states have call successors, (78) [2024-11-04 15:07:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 469 transitions. [2024-11-04 15:07:38,418 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 469 transitions. Word has length 127 [2024-11-04 15:07:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:38,418 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 469 transitions. [2024-11-04 15:07:38,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 15 states have call successors, (30), 5 states have call predecessors, (30), 7 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2024-11-04 15:07:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 469 transitions. [2024-11-04 15:07:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-04 15:07:38,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:38,420 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:38,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-04 15:07:38,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:38,621 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:38,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1859535389, now seen corresponding path program 1 times [2024-11-04 15:07:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881466551] [2024-11-04 15:07:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:38,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:38,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:38,624 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:38,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-04 15:07:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:38,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-04 15:07:38,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:38,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:07:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-04 15:07:40,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:43,561 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-04 15:07:43,562 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 30 treesize of output 25 [2024-11-04 15:07:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-04 15:07:43,663 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:43,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881466551] [2024-11-04 15:07:43,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881466551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:07:43,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:07:43,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 21 [2024-11-04 15:07:43,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474672148] [2024-11-04 15:07:43,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:07:43,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-04 15:07:43,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-04 15:07:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-04 15:07:43,665 INFO L87 Difference]: Start difference. First operand 376 states and 469 transitions. Second operand has 21 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 9 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-04 15:07:48,265 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] [2024-11-04 15:07:52,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:07:56,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:08:00,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:08:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:08:04,131 INFO L93 Difference]: Finished difference Result 684 states and 842 transitions. [2024-11-04 15:08:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-04 15:08:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 9 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 127 [2024-11-04 15:08:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:08:04,135 INFO L225 Difference]: With dead ends: 684 [2024-11-04 15:08:04,135 INFO L226 Difference]: Without dead ends: 431 [2024-11-04 15:08:04,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 225 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2024-11-04 15:08:04,136 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 149 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 50 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2024-11-04 15:08:04,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1234 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 720 Invalid, 4 Unknown, 0 Unchecked, 19.4s Time] [2024-11-04 15:08:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2024-11-04 15:08:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 246. [2024-11-04 15:08:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 181 states have (on average 1.1657458563535912) internal successors, (211), 185 states have internal predecessors, (211), 39 states have call successors, (39), 21 states have call predecessors, (39), 25 states have return successors, (47), 39 states have call predecessors, (47), 37 states have call successors, (47) [2024-11-04 15:08:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 297 transitions. [2024-11-04 15:08:04,181 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 297 transitions. Word has length 127 [2024-11-04 15:08:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:08:04,182 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 297 transitions. [2024-11-04 15:08:04,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 9 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-04 15:08:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 297 transitions. [2024-11-04 15:08:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-04 15:08:04,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:08:04,183 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:08:04,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-04 15:08:04,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:04,383 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:08:04,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:08:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1915914431, now seen corresponding path program 1 times [2024-11-04 15:08:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:08:04,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048258688] [2024-11-04 15:08:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:08:04,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:08:04,385 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:08:04,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-04 15:08:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:04,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-04 15:08:04,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:04,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-04 15:08:04,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-04 15:08:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-04 15:08:06,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:08:07,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 15:08:07,415 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 246 treesize of output 245 [2024-11-04 15:08:07,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 156 [2024-11-04 15:08:07,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-04 15:08:07,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-04 15:08:07,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-04 15:08:07,578 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-11-04 15:08:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-04 15:08:07,771 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:08:07,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048258688] [2024-11-04 15:08:07,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048258688] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:08:07,771 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:08:07,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 21 [2024-11-04 15:08:07,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928914608] [2024-11-04 15:08:07,771 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:08:07,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-04 15:08:07,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:08:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-04 15:08:07,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-11-04 15:08:07,773 INFO L87 Difference]: Start difference. First operand 246 states and 297 transitions. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 19 states have internal predecessors, (122), 9 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-04 15:08:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:08:11,301 INFO L93 Difference]: Finished difference Result 597 states and 727 transitions. [2024-11-04 15:08:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-04 15:08:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 19 states have internal predecessors, (122), 9 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 125 [2024-11-04 15:08:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:08:11,303 INFO L225 Difference]: With dead ends: 597 [2024-11-04 15:08:11,303 INFO L226 Difference]: Without dead ends: 458 [2024-11-04 15:08:11,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 218 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-11-04 15:08:11,304 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 95 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:08:11,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 914 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-04 15:08:11,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2024-11-04 15:08:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 246. [2024-11-04 15:08:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 181 states have (on average 1.1546961325966851) internal successors, (209), 185 states have internal predecessors, (209), 39 states have call successors, (39), 21 states have call predecessors, (39), 25 states have return successors, (47), 39 states have call predecessors, (47), 37 states have call successors, (47) [2024-11-04 15:08:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 295 transitions. [2024-11-04 15:08:11,366 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 295 transitions. Word has length 125 [2024-11-04 15:08:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:08:11,366 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 295 transitions. [2024-11-04 15:08:11,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 19 states have internal predecessors, (122), 9 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-04 15:08:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 295 transitions. [2024-11-04 15:08:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-04 15:08:11,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:08:11,374 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:08:11,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-04 15:08:11,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:11,574 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:08:11,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:08:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1781900925, now seen corresponding path program 1 times [2024-11-04 15:08:11,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:08:11,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552106480] [2024-11-04 15:08:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:08:11,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:11,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:08:11,577 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:08:11,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-04 15:08:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:11,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-04 15:08:11,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:11,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-04 15:08:11,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-04 15:08:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-04 15:08:14,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:08:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-04 15:08:15,471 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:08:15,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552106480] [2024-11-04 15:08:15,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552106480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:08:15,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:08:15,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 25 [2024-11-04 15:08:15,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385886135] [2024-11-04 15:08:15,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:08:15,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-04 15:08:15,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:08:15,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-04 15:08:15,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-11-04 15:08:15,473 INFO L87 Difference]: Start difference. First operand 246 states and 295 transitions. Second operand has 25 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 9 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-04 15:08:19,544 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] [2024-11-04 15:08:23,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:08:27,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:08:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:08:32,851 INFO L93 Difference]: Finished difference Result 387 states and 467 transitions. [2024-11-04 15:08:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-04 15:08:32,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 9 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 125 [2024-11-04 15:08:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:08:32,853 INFO L225 Difference]: With dead ends: 387 [2024-11-04 15:08:32,853 INFO L226 Difference]: Without dead ends: 255 [2024-11-04 15:08:32,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 217 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2024-11-04 15:08:32,856 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 123 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 58 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:08:32,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1402 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 964 Invalid, 3 Unknown, 0 Unchecked, 16.0s Time] [2024-11-04 15:08:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-04 15:08:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 246. [2024-11-04 15:08:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 181 states have (on average 1.149171270718232) internal successors, (208), 185 states have internal predecessors, (208), 39 states have call successors, (39), 21 states have call predecessors, (39), 25 states have return successors, (47), 39 states have call predecessors, (47), 37 states have call successors, (47) [2024-11-04 15:08:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2024-11-04 15:08:32,892 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 125 [2024-11-04 15:08:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:08:32,892 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2024-11-04 15:08:32,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 9 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-04 15:08:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2024-11-04 15:08:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-04 15:08:32,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:08:32,893 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:08:32,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-04 15:08:33,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:33,094 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:08:33,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:08:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1843940539, now seen corresponding path program 1 times [2024-11-04 15:08:33,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:08:33,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281592903] [2024-11-04 15:08:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:08:33,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:33,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:08:33,096 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:08:33,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-04 15:08:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:33,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-04 15:08:33,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:33,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:08:33,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:08:37,605 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_19| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_19| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_19|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_19|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_19| (_ BitVec 64)) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_19| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_19|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_19|))))) is different from true [2024-11-04 15:08:41,818 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_48 (_ BitVec 64)) (v_aws_linked_list_back_~list.base_BEFORE_CALL_49 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.base| v_aws_linked_list_back_~list.base_BEFORE_CALL_49) v_aws_linked_list_back_~list.offset_BEFORE_CALL_48)))) (exists ((v_aws_linked_list_back_~list.offset_BEFORE_CALL_48 (_ BitVec 64)) (v_aws_linked_list_back_~list.base_BEFORE_CALL_49 (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| v_aws_linked_list_back_~list.base_BEFORE_CALL_49) v_aws_linked_list_back_~list.offset_BEFORE_CALL_48))))) is different from true