/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 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_node_reset_harness-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 20:47:43,843 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 20:47:43,897 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 20:47:43,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 20:47:43,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 20:47:43,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 20:47:43,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 20:47:43,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 20:47:43,923 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 20:47:43,925 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 20:47:43,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 20:47:43,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 20:47:43,926 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 20:47:43,926 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 20:47:43,926 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 20:47:43,926 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 20:47:43,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 20:47:43,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 20:47:43,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 20:47:43,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 20:47:43,927 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 20:47:43,930 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 20:47:43,930 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 20:47:43,930 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 20:47:43,930 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 20:47:43,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 20:47:43,931 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 20:47:43,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 20:47:43,931 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 20:47:43,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 20:47:43,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 20:47:43,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 20:47:43,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 20:47:43,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 20:47:43,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 20:47:43,932 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 20:47:43,933 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:43,933 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 20:47:43,933 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 20:47:43,936 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 20:47:43,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 20:47:43,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:44,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 20:47:44,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 20:47:44,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 20:47:44,130 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 20:47:44,130 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 20:47:44,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_node_reset_harness-1.i [2024-11-04 20:47:45,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 20:47:45,668 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 20:47:45,669 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_node_reset_harness-1.i [2024-11-04 20:47:45,693 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e41494f9/69450d261cd041dd98459e7e2583a0e7/FLAGc094e94d6 [2024-11-04 20:47:45,923 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e41494f9/69450d261cd041dd98459e7e2583a0e7 [2024-11-04 20:47:45,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 20:47:45,925 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 20:47:45,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 20:47:45,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 20:47:45,931 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 20:47:45,931 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 08:47:45" (1/1) ... [2024-11-04 20:47:45,932 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703b9dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:45, skipping insertion in model container [2024-11-04 20:47:45,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 08:47:45" (1/1) ... [2024-11-04 20:47:45,988 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 20:47:46,171 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_node_reset_harness-1.i[4500,4513] [2024-11-04 20:47:46,176 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_node_reset_harness-1.i[4560,4573] [2024-11-04 20:47:46,507 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 20:47:46,577 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 20:47:46,577 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 20:47:46,578 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 20:47:46,583 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 20:47:46,586 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,586 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,587 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,587 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 20:47:46,588 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,588 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,590 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 20:47:46,590 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 20:47:46,595 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 20:47:46,596 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 20:47:46,603 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,604 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 20:47:46,604 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,604 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 20:47:46,605 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,606 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 20:47:46,606 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,607 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 20:47:46,611 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,612 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:46,612 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,612 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:46,613 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,613 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:46,892 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 20:47:46,893 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 20:47:46,893 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 20:47:46,893 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 20:47:46,973 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 20:47:46,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 20:47:47,006 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-04 20:47:47,024 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 20:47:47,027 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2024-11-04 20:47:47,027 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2024-11-04 20:47:47,044 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 20:47:47,058 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 20:47:47,058 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 20:47:47,059 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 20:47:47,066 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 20:47:47,066 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,067 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,067 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,067 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,067 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,068 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,069 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,069 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,074 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,074 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,077 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,077 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 20:47:47,077 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,077 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 20:47:47,078 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,078 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,078 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,078 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,079 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,079 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,079 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,079 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,079 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,079 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,119 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 20:47:47,119 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 20:47:47,120 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,120 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 20:47:47,145 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 20:47:47,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 20:47:47,155 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 20:47:47,169 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_node_reset_harness-1.i[4500,4513] [2024-11-04 20:47:47,169 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_node_reset_harness-1.i[4560,4573] [2024-11-04 20:47:47,203 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,203 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,204 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,204 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,204 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,208 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,209 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,211 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,212 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,212 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,212 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,212 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,213 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 20:47:47,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 20:47:47,384 WARN L710 CHandler]: The following functions are not defined or handled internally: aws_array_list_ensure_capacity [2024-11-04 20:47:47,390 INFO L204 MainTranslator]: Completed translation [2024-11-04 20:47:47,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47 WrapperNode [2024-11-04 20:47:47,391 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 20:47:47,392 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 20:47:47,392 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 20:47:47,392 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 20:47:47,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,449 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,484 INFO L138 Inliner]: procedures = 687, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 28 [2024-11-04 20:47:47,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 20:47:47,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 20:47:47,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 20:47:47,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 20:47:47,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,498 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,514 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-11-04 20:47:47,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,542 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 20:47:47,552 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 20:47:47,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 20:47:47,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 20:47:47,553 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (1/1) ... [2024-11-04 20:47:47,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 20:47:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 20:47:47,580 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 20:47:47,585 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 20:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2024-11-04 20:47:47,600 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2024-11-04 20:47:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2024-11-04 20:47:47,601 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-04 20:47:47,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 20:47:47,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-11-04 20:47:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-11-04 20:47:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2024-11-04 20:47:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2024-11-04 20:47:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2024-11-04 20:47:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2024-11-04 20:47:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2024-11-04 20:47:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2024-11-04 20:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-04 20:47:47,603 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-04 20:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-04 20:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-04 20:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-04 20:47:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-04 20:47:47,792 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 20:47:47,794 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 20:47:47,953 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-11-04 20:47:47,953 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 20:47:47,960 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 20:47:47,960 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-04 20:47:47,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 08:47:47 BoogieIcfgContainer [2024-11-04 20:47:47,961 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 20:47:47,963 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 20:47:47,963 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 20:47:47,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 20:47:47,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 08:47:45" (1/3) ... [2024-11-04 20:47:47,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc18d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 08:47:47, skipping insertion in model container [2024-11-04 20:47:47,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 08:47:47" (2/3) ... [2024-11-04 20:47:47,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc18d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 08:47:47, skipping insertion in model container [2024-11-04 20:47:47,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 08:47:47" (3/3) ... [2024-11-04 20:47:47,968 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2024-11-04 20:47:47,978 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 20:47:47,979 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 20:47:48,014 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 20:47:48,018 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;@354f92c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 20:47:48,019 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 20:47:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-04 20:47:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-04 20:47:48,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:47:48,026 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:47:48,026 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:47:48,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:47:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash 896723244, now seen corresponding path program 1 times [2024-11-04 20:47:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:47:48,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392875878] [2024-11-04 20:47:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:47:48,038 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:48,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:47:48,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:47:48,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-04 20:47:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:47:48,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-04 20:47:48,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:47:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:48,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:47:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:48,207 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:47:48,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392875878] [2024-11-04 20:47:48,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392875878] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:47:48,208 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:47:48,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2024-11-04 20:47:48,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392096019] [2024-11-04 20:47:48,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:47:48,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-04 20:47:48,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:47:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-04 20:47:48,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 20:47:48,232 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 20:47:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:47:48,249 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-11-04 20:47:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-04 20:47:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-04 20:47:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:47:48,255 INFO L225 Difference]: With dead ends: 75 [2024-11-04 20:47:48,256 INFO L226 Difference]: Without dead ends: 36 [2024-11-04 20:47:48,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 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 20:47:48,261 INFO L432 NwaCegarLoop]: 45 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, 45 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 20:47:48,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:47:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-04 20:47:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-04 20:47:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 20:47:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-04 20:47:48,290 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2024-11-04 20:47:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:47:48,290 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-04 20:47:48,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-04 20:47:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-04 20:47:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-04 20:47:48,292 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:47:48,292 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:47:48,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-11-04 20:47:48,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:48,493 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:47:48,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:47:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2088176269, now seen corresponding path program 1 times [2024-11-04 20:47:48,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:47:48,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579195037] [2024-11-04 20:47:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:47:48,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:48,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:47:48,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:47:48,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-04 20:47:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:47:48,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-04 20:47:48,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:47:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:48,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:47:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:48,699 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:47:48,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579195037] [2024-11-04 20:47:48,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [579195037] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:47:48,700 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:47:48,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-04 20:47:48,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15474012] [2024-11-04 20:47:48,700 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:47:48,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 20:47:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:47:48,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 20:47:48,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-04 20:47:48,704 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-04 20:47:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:47:48,747 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2024-11-04 20:47:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:47:48,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-11-04 20:47:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:47:48,750 INFO L225 Difference]: With dead ends: 64 [2024-11-04 20:47:48,750 INFO L226 Difference]: Without dead ends: 38 [2024-11-04 20:47:48,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-04 20:47:48,751 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:47:48,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 185 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:47:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-04 20:47:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-04 20:47:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 20:47:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-04 20:47:48,761 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2024-11-04 20:47:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:47:48,762 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-04 20:47:48,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-04 20:47:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-04 20:47:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-04 20:47:48,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:47:48,763 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:47:48,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-04 20:47:48,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:48,963 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:47:48,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:47:48,964 INFO L85 PathProgramCache]: Analyzing trace with hash 563665907, now seen corresponding path program 1 times [2024-11-04 20:47:48,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:47:48,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940427755] [2024-11-04 20:47:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:47:48,964 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:48,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:47:48,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:47:48,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-04 20:47:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:47:49,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-04 20:47:49,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:47:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-04 20:47:49,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:47:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-04 20:47:49,161 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:47:49,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940427755] [2024-11-04 20:47:49,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [940427755] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 20:47:49,161 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 20:47:49,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-04 20:47:49,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945346757] [2024-11-04 20:47:49,162 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 20:47:49,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 20:47:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:47:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 20:47:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-04 20:47:49,163 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-04 20:47:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:47:49,203 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2024-11-04 20:47:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 20:47:49,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2024-11-04 20:47:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:47:49,206 INFO L225 Difference]: With dead ends: 71 [2024-11-04 20:47:49,209 INFO L226 Difference]: Without dead ends: 46 [2024-11-04 20:47:49,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-04 20:47:49,210 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 20:47:49,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 133 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 20:47:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-04 20:47:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-11-04 20:47:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 20:47:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-11-04 20:47:49,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2024-11-04 20:47:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:47:49,217 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-11-04 20:47:49,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-04 20:47:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-11-04 20:47:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-04 20:47:49,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:47:49,220 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 20:47:49,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-04 20:47:49,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:49,421 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:47:49,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:47:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2131728106, now seen corresponding path program 1 times [2024-11-04 20:47:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:47:49,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508076224] [2024-11-04 20:47:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:47:49,422 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:49,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:47:49,424 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:47:49,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-04 20:47:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:47:49,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 20:47:49,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:47:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:49,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:47:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:49,742 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:47:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508076224] [2024-11-04 20:47:49,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [508076224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:47:49,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:47:49,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-04 20:47:49,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998113132] [2024-11-04 20:47:49,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:47:49,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-04 20:47:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:47:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-04 20:47:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-04 20:47:49,744 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-04 20:47:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:47:49,860 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2024-11-04 20:47:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-04 20:47:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2024-11-04 20:47:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:47:49,863 INFO L225 Difference]: With dead ends: 76 [2024-11-04 20:47:49,863 INFO L226 Difference]: Without dead ends: 46 [2024-11-04 20:47:49,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2024-11-04 20:47:49,864 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 20:47:49,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 187 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 20:47:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-04 20:47:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-04 20:47:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 20:47:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2024-11-04 20:47:49,871 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 28 [2024-11-04 20:47:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:47:49,871 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2024-11-04 20:47:49,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-04 20:47:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2024-11-04 20:47:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-04 20:47:49,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:47:49,872 INFO L215 NwaCegarLoop]: trace histogram [6, 1, 1, 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 20:47:49,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-04 20:47:50,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:50,073 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:47:50,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:47:50,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2022145046, now seen corresponding path program 2 times [2024-11-04 20:47:50,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:47:50,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691164771] [2024-11-04 20:47:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:47:50,073 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:50,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:47:50,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:47:50,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-11-04 20:47:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:47:50,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-04 20:47:50,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:47:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:50,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:47:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:50,554 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:47:50,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691164771] [2024-11-04 20:47:50,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691164771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:47:50,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:47:50,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-04 20:47:50,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97080168] [2024-11-04 20:47:50,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:47:50,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-04 20:47:50,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:47:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-04 20:47:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2024-11-04 20:47:50,559 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-04 20:47:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:47:50,952 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2024-11-04 20:47:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-04 20:47:50,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-11-04 20:47:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:47:50,953 INFO L225 Difference]: With dead ends: 84 [2024-11-04 20:47:50,953 INFO L226 Difference]: Without dead ends: 54 [2024-11-04 20:47:50,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2024-11-04 20:47:50,954 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 20:47:50,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 408 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 20:47:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-04 20:47:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-04 20:47:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 20:47:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2024-11-04 20:47:50,962 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2024-11-04 20:47:50,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:47:50,962 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2024-11-04 20:47:50,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-04 20:47:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2024-11-04 20:47:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-04 20:47:50,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:47:50,966 INFO L215 NwaCegarLoop]: trace histogram [14, 1, 1, 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 20:47:50,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2024-11-04 20:47:51,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:51,167 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:47:51,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:47:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1563501078, now seen corresponding path program 3 times [2024-11-04 20:47:51,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:47:51,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240034699] [2024-11-04 20:47:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:47:51,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:51,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:47:51,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:47:51,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-11-04 20:47:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:47:51,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-04 20:47:51,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:47:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:51,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:47:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:52,189 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 20:47:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240034699] [2024-11-04 20:47:52,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [240034699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 20:47:52,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 20:47:52,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2024-11-04 20:47:52,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871023848] [2024-11-04 20:47:52,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 20:47:52,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-04 20:47:52,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 20:47:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-04 20:47:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2024-11-04 20:47:52,193 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-04 20:47:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 20:47:52,661 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2024-11-04 20:47:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-04 20:47:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-04 20:47:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 20:47:52,662 INFO L225 Difference]: With dead ends: 83 [2024-11-04 20:47:52,662 INFO L226 Difference]: Without dead ends: 55 [2024-11-04 20:47:52,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2024-11-04 20:47:52,663 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-04 20:47:52,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 630 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-04 20:47:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-04 20:47:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-04 20:47:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-04 20:47:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-11-04 20:47:52,670 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 40 [2024-11-04 20:47:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 20:47:52,670 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-11-04 20:47:52,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-04 20:47:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-11-04 20:47:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-04 20:47:52,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 20:47:52,671 INFO L215 NwaCegarLoop]: trace histogram [15, 1, 1, 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 20:47:52,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-11-04 20:47:52,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:52,872 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 20:47:52,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 20:47:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash 772190750, now seen corresponding path program 4 times [2024-11-04 20:47:52,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 20:47:52,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488819090] [2024-11-04 20:47:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 20:47:52,873 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 20:47:52,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 20:47:52,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 20:47:52,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-04 20:47:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 20:47:53,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-04 20:47:53,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 20:47:53,304 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 12 treesize of output 8 [2024-11-04 20:47:53,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 22 [2024-11-04 20:47:53,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:53,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 33 treesize of output 35 [2024-11-04 20:47:53,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:53,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 48 [2024-11-04 20:47:53,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:53,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2024-11-04 20:47:53,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:53,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 74 [2024-11-04 20:47:53,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:53,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 87 [2024-11-04 20:47:53,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:53,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 100 [2024-11-04 20:47:53,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:53,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 93 treesize of output 113 [2024-11-04 20:47:54,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:54,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 103 treesize of output 126 [2024-11-04 20:47:54,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:54,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 113 treesize of output 139 [2024-11-04 20:47:54,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:54,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 123 treesize of output 152 [2024-11-04 20:47:54,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:54,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 133 treesize of output 165 [2024-11-04 20:47:54,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:54,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 143 treesize of output 178 [2024-11-04 20:47:55,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 20:47:55,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 153 treesize of output 191 [2024-11-04 20:47:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 20:47:56,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 20:49:21,514 WARN L286 SmtUtils]: Spent 1.41m on a formula simplification. DAG size of input: 172 DAG size of output: 170 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)