/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_begin_harness_negated.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 15:07:05,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 15:07:05,572 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-04 15:07:05,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 15:07:05,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 15:07:05,597 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 15:07:05,598 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 15:07:05,599 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 15:07:05,599 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 15:07:05,600 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 15:07:05,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 15:07:05,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 15:07:05,601 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 15:07:05,601 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 15:07:05,602 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 15:07:05,602 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 15:07:05,603 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 15:07:05,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 15:07:05,606 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 15:07:05,607 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 15:07:05,610 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 15:07:05,611 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 15:07:05,611 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 15:07:05,612 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 15:07:05,612 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 15:07:05,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 15:07:05,612 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 15:07:05,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 15:07:05,613 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 15:07:05,613 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 15:07:05,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 15:07:05,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 15:07:05,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 15:07:05,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 15:07:05,615 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 15:07:05,615 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 15:07:05,615 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 15:07:05,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 15:07:05,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 15:07:05,616 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 15:07:05,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 15:07:05,617 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:05,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 15:07:05,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 15:07:05,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 15:07:05,910 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 15:07:05,911 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 15:07:05,912 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_begin_harness_negated.i [2024-11-04 15:07:07,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 15:07:08,021 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 15:07:08,021 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_begin_harness_negated.i [2024-11-04 15:07:08,055 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18c66e9bf/26e4f1b8768d4ec88f5ab855bf006d95/FLAGc2b1008fe [2024-11-04 15:07:08,148 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18c66e9bf/26e4f1b8768d4ec88f5ab855bf006d95 [2024-11-04 15:07:08,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 15:07:08,152 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 15:07:08,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 15:07:08,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 15:07:08,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 15:07:08,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:07:08" (1/1) ... [2024-11-04 15:07:08,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f15641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:08, skipping insertion in model container [2024-11-04 15:07:08,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 03:07:08" (1/1) ... [2024-11-04 15:07:08,264 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 15:07:08,589 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_begin_harness_negated.i[4495,4508] [2024-11-04 15:07:08,602 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_begin_harness_negated.i[4555,4568] [2024-11-04 15:07:09,504 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,595 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 15:07:09,596 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 15:07:09,597 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,608 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,613 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,614 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,614 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,615 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,615 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,616 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,620 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,620 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,623 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,624 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,632 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,633 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,633 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,634 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,635 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,636 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,636 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,637 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,638 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,639 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,639 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,640 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:09,640 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:09,641 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,013 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,014 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,015 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,016 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,187 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:10,247 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-04 15:07:10,277 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 15:07:10,287 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_begin_harness_negated.i[4495,4508] [2024-11-04 15:07:10,288 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_begin_harness_negated.i[4555,4568] [2024-11-04 15:07:10,323 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,348 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,348 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,349 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,358 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,359 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,364 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,364 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,365 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,365 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,366 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,371 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,371 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,377 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,377 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,389 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,389 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,390 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,390 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,391 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,391 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,391 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,392 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,396 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,397 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,397 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,398 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,398 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,398 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,479 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,480 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,480 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,481 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,522 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-04 15:07:10,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:10,548 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 15:07:10,568 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_begin_harness_negated.i[4495,4508] [2024-11-04 15:07:10,569 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_begin_harness_negated.i[4555,4568] [2024-11-04 15:07:10,628 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,628 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,629 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,629 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,630 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,637 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,637 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,640 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,640 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,642 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,643 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,643 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,643 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-04 15:07:10,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 15:07:10,938 WARN L710 CHandler]: The following functions are not defined or handled internally: aws_array_list_ensure_capacity [2024-11-04 15:07:10,951 INFO L204 MainTranslator]: Completed translation [2024-11-04 15:07:10,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10 WrapperNode [2024-11-04 15:07:10,952 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 15:07:10,953 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 15:07:10,953 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 15:07:10,954 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 15:07:10,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,171 INFO L138 Inliner]: procedures = 687, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 144 [2024-11-04 15:07:11,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 15:07:11,177 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 15:07:11,177 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 15:07:11,177 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 15:07:11,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,233 INFO L175 MemorySlicer]: Split 24 memory accesses to 3 slices as follows [2, 5, 17]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 6 writes are split as follows [0, 0, 6]. [2024-11-04 15:07:11,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,255 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,261 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,274 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,280 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 15:07:11,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 15:07:11,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 15:07:11,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 15:07:11,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (1/1) ... [2024-11-04 15:07:11,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 15:07:11,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:11,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-04 15:07:11,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-04 15:07:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-04 15:07:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 15:07:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-04 15:07:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-04 15:07:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-04 15:07:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-04 15:07:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-04 15:07:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-04 15:07:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-04 15:07:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2024-11-04 15:07:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2024-11-04 15:07:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 15:07:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-04 15:07:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-04 15:07:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-04 15:07:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 15:07:11,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 15:07:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-04 15:07:11,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-04 15:07:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-04 15:07:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-04 15:07:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-04 15:07:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-04 15:07:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-04 15:07:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-04 15:07:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-04 15:07:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-11-04 15:07:11,377 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-11-04 15:07:11,716 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 15:07:11,719 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 15:07:12,101 INFO L? ?]: Removed 56 outVars from TransFormulas that were not future-live. [2024-11-04 15:07:12,101 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 15:07:12,120 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 15:07:12,120 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-04 15:07:12,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:07:12 BoogieIcfgContainer [2024-11-04 15:07:12,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 15:07:12,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 15:07:12,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 15:07:12,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 15:07:12,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 03:07:08" (1/3) ... [2024-11-04 15:07:12,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439dd3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:07:12, skipping insertion in model container [2024-11-04 15:07:12,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 03:07:10" (2/3) ... [2024-11-04 15:07:12,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439dd3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 03:07:12, skipping insertion in model container [2024-11-04 15:07:12,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 03:07:12" (3/3) ... [2024-11-04 15:07:12,130 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness_negated.i [2024-11-04 15:07:12,146 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 15:07:12,146 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 15:07:12,220 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 15:07:12,227 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;@481e362d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 15:07:12,227 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 15:07:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-04 15:07:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-04 15:07:12,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:12,243 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:12,244 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:12,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:12,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2024-11-04 15:07:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929218947] [2024-11-04 15:07:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:12,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:12,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:12,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:12,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-04 15:07:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:12,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-04 15:07:12,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-04 15:07:12,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-04 15:07:12,639 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:12,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929218947] [2024-11-04 15:07:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [929218947] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:12,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-04 15:07:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757703342] [2024-11-04 15:07:12,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:12,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-04 15:07:12,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:12,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-04 15:07:12,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 15:07:12,680 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-04 15:07:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:12,704 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2024-11-04 15:07:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-04 15:07:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2024-11-04 15:07:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:12,714 INFO L225 Difference]: With dead ends: 130 [2024-11-04 15:07:12,714 INFO L226 Difference]: Without dead ends: 64 [2024-11-04 15:07:12,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-04 15:07:12,723 INFO L432 NwaCegarLoop]: 88 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, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:12,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-04 15:07:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-04 15:07:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-04 15:07:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2024-11-04 15:07:12,782 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2024-11-04 15:07:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:12,782 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2024-11-04 15:07:12,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-04 15:07:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2024-11-04 15:07:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-04 15:07:12,786 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:12,786 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:12,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-04 15:07:12,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:12,987 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:12,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:12,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2024-11-04 15:07:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:12,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926079312] [2024-11-04 15:07:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:12,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:12,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:12,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:12,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-04 15:07:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:13,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 15:07:13,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-04 15:07:13,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-04 15:07:13,396 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:13,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926079312] [2024-11-04 15:07:13,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1926079312] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:13,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:13,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2024-11-04 15:07:13,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889318851] [2024-11-04 15:07:13,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:13,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 15:07:13,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:13,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 15:07:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-04 15:07:13,400 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-04 15:07:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:13,475 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2024-11-04 15:07:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 15:07:13,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2024-11-04 15:07:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:13,483 INFO L225 Difference]: With dead ends: 116 [2024-11-04 15:07:13,483 INFO L226 Difference]: Without dead ends: 66 [2024-11-04 15:07:13,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-04 15:07:13,485 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:13,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 382 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-04 15:07:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-04 15:07:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-11-04 15:07:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2024-11-04 15:07:13,507 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 68 [2024-11-04 15:07:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:13,508 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2024-11-04 15:07:13,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-04 15:07:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2024-11-04 15:07:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-04 15:07:13,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:13,510 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:13,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-04 15:07:13,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:13,712 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:13,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2024-11-04 15:07:13,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:13,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433392369] [2024-11-04 15:07:13,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:13,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:13,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:13,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:13,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-04 15:07:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:13,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-04 15:07:13,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-04 15:07:13,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-04 15:07:14,201 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:14,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433392369] [2024-11-04 15:07:14,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [433392369] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:14,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:14,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-11-04 15:07:14,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449065901] [2024-11-04 15:07:14,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:14,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 15:07:14,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:14,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 15:07:14,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:14,206 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-04 15:07:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:14,389 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2024-11-04 15:07:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 15:07:14,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2024-11-04 15:07:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:14,391 INFO L225 Difference]: With dead ends: 123 [2024-11-04 15:07:14,391 INFO L226 Difference]: Without dead ends: 71 [2024-11-04 15:07:14,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:14,393 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 21 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:14,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 300 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 15:07:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-04 15:07:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2024-11-04 15:07:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 51 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-04 15:07:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2024-11-04 15:07:14,415 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 70 [2024-11-04 15:07:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:14,415 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2024-11-04 15:07:14,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-04 15:07:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2024-11-04 15:07:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-04 15:07:14,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:14,422 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:14,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-04 15:07:14,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:14,623 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:14,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2024-11-04 15:07:14,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:14,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819206676] [2024-11-04 15:07:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:14,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:14,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:14,627 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:14,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-04 15:07:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:14,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-04 15:07:14,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-04 15:07:14,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-04 15:07:15,266 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819206676] [2024-11-04 15:07:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819206676] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:15,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:15,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2024-11-04 15:07:15,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015093799] [2024-11-04 15:07:15,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:15,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-04 15:07:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-04 15:07:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-04 15:07:15,270 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-04 15:07:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:15,572 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2024-11-04 15:07:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-04 15:07:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2024-11-04 15:07:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:15,575 INFO L225 Difference]: With dead ends: 135 [2024-11-04 15:07:15,575 INFO L226 Difference]: Without dead ends: 80 [2024-11-04 15:07:15,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-04 15:07:15,577 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 30 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:15,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 354 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 15:07:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-04 15:07:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2024-11-04 15:07:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-04 15:07:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-11-04 15:07:15,590 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 72 [2024-11-04 15:07:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:15,590 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-11-04 15:07:15,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-04 15:07:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-11-04 15:07:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-04 15:07:15,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:15,593 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:15,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-04 15:07:15,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:15,794 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:15,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2024-11-04 15:07:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:15,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382838562] [2024-11-04 15:07:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:15,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:15,797 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:15,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-04 15:07:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:15,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-04 15:07:15,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-04 15:07:15,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-04 15:07:16,049 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:16,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382838562] [2024-11-04 15:07:16,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [382838562] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:16,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:16,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2024-11-04 15:07:16,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323370516] [2024-11-04 15:07:16,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:16,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-04 15:07:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-04 15:07:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:16,052 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-04 15:07:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:16,091 INFO L93 Difference]: Finished difference Result 132 states and 182 transitions. [2024-11-04 15:07:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-04 15:07:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2024-11-04 15:07:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:16,094 INFO L225 Difference]: With dead ends: 132 [2024-11-04 15:07:16,094 INFO L226 Difference]: Without dead ends: 75 [2024-11-04 15:07:16,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:16,095 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:16,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 154 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-04 15:07:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-11-04 15:07:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-04 15:07:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2024-11-04 15:07:16,105 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 73 [2024-11-04 15:07:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:16,105 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2024-11-04 15:07:16,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-04 15:07:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2024-11-04 15:07:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-04 15:07:16,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:16,109 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:16,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:16,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:16,310 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:16,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash 137287748, now seen corresponding path program 1 times [2024-11-04 15:07:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:16,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279462205] [2024-11-04 15:07:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:16,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:16,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:16,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:16,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-04 15:07:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:16,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 15:07:16,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-04 15:07:16,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-04 15:07:16,646 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:16,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279462205] [2024-11-04 15:07:16,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [279462205] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:16,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:16,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2024-11-04 15:07:16,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478917530] [2024-11-04 15:07:16,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:16,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 15:07:16,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 15:07:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-04 15:07:16,649 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-04 15:07:16,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:16,703 INFO L93 Difference]: Finished difference Result 123 states and 163 transitions. [2024-11-04 15:07:16,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 15:07:16,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2024-11-04 15:07:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:16,706 INFO L225 Difference]: With dead ends: 123 [2024-11-04 15:07:16,706 INFO L226 Difference]: Without dead ends: 72 [2024-11-04 15:07:16,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-04 15:07:16,707 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:16,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 381 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-04 15:07:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-04 15:07:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-04 15:07:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2024-11-04 15:07:16,716 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 81 [2024-11-04 15:07:16,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:16,717 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2024-11-04 15:07:16,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-04 15:07:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2024-11-04 15:07:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-04 15:07:16,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:16,719 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:16,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-04 15:07:16,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:16,920 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:16,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash 416892704, now seen corresponding path program 1 times [2024-11-04 15:07:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:16,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251564476] [2024-11-04 15:07:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:16,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:16,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:16,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:16,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-04 15:07:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:17,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-04 15:07:17,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-04 15:07:17,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-04 15:07:17,491 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:17,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251564476] [2024-11-04 15:07:17,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [251564476] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:17,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:17,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2024-11-04 15:07:17,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989236829] [2024-11-04 15:07:17,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:17,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-04 15:07:17,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-04 15:07:17,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-04 15:07:17,493 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-04 15:07:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:17,699 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions. [2024-11-04 15:07:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-04 15:07:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2024-11-04 15:07:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:17,703 INFO L225 Difference]: With dead ends: 132 [2024-11-04 15:07:17,703 INFO L226 Difference]: Without dead ends: 74 [2024-11-04 15:07:17,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-04 15:07:17,705 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 22 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:17,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 363 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 15:07:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-04 15:07:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-11-04 15:07:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-04 15:07:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2024-11-04 15:07:17,718 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 83 [2024-11-04 15:07:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:17,718 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2024-11-04 15:07:17,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 7 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-04 15:07:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2024-11-04 15:07:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-04 15:07:17,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:17,720 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:17,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:17,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:17,921 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:17,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:17,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1552562003, now seen corresponding path program 1 times [2024-11-04 15:07:17,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:17,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381816837] [2024-11-04 15:07:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:17,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:17,924 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:17,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-04 15:07:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:18,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-04 15:07:18,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-04 15:07:18,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-04 15:07:18,448 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:18,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381816837] [2024-11-04 15:07:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381816837] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:18,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:18,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2024-11-04 15:07:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895506049] [2024-11-04 15:07:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:18,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 15:07:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 15:07:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-04 15:07:18,451 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-04 15:07:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:18,720 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2024-11-04 15:07:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-04 15:07:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 85 [2024-11-04 15:07:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:18,723 INFO L225 Difference]: With dead ends: 132 [2024-11-04 15:07:18,723 INFO L226 Difference]: Without dead ends: 73 [2024-11-04 15:07:18,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-04 15:07:18,725 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 31 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:18,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 408 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 15:07:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-04 15:07:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2024-11-04 15:07:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 50 states have internal predecessors, (60), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-04 15:07:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2024-11-04 15:07:18,743 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 85 [2024-11-04 15:07:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:18,743 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2024-11-04 15:07:18,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-04 15:07:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2024-11-04 15:07:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-04 15:07:18,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:18,748 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:18,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-04 15:07:18,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:18,949 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:18,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash 572959972, now seen corresponding path program 2 times [2024-11-04 15:07:18,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:18,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574521996] [2024-11-04 15:07:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:18,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:18,952 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:18,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-04 15:07:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:19,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-04 15:07:19,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-04 15:07:19,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-04 15:07:19,294 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574521996] [2024-11-04 15:07:19,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574521996] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:19,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:19,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2024-11-04 15:07:19,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382610904] [2024-11-04 15:07:19,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:19,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-04 15:07:19,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-04 15:07:19,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:19,297 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-04 15:07:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:19,390 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2024-11-04 15:07:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-04 15:07:19,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2024-11-04 15:07:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:19,396 INFO L225 Difference]: With dead ends: 125 [2024-11-04 15:07:19,396 INFO L226 Difference]: Without dead ends: 71 [2024-11-04 15:07:19,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:19,397 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:19,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 447 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 15:07:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-04 15:07:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-04 15:07:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.24) internal successors, (62), 53 states have internal predecessors, (62), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-04 15:07:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-11-04 15:07:19,415 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 94 [2024-11-04 15:07:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:19,416 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-11-04 15:07:19,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-04 15:07:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-11-04 15:07:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-04 15:07:19,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:19,418 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:19,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-04 15:07:19,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:19,619 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:19,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:19,620 INFO L85 PathProgramCache]: Analyzing trace with hash -959329865, now seen corresponding path program 1 times [2024-11-04 15:07:19,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:19,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293101456] [2024-11-04 15:07:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:19,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:19,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:19,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:19,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-04 15:07:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:19,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-04 15:07:19,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-04 15:07:19,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-04 15:07:20,000 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:20,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293101456] [2024-11-04 15:07:20,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [293101456] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:20,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:20,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2024-11-04 15:07:20,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046191865] [2024-11-04 15:07:20,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:20,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-04 15:07:20,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:20,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-04 15:07:20,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:20,003 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-04 15:07:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:20,073 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2024-11-04 15:07:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-04 15:07:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 96 [2024-11-04 15:07:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:20,076 INFO L225 Difference]: With dead ends: 121 [2024-11-04 15:07:20,076 INFO L226 Difference]: Without dead ends: 71 [2024-11-04 15:07:20,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:20,078 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:20,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 446 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 15:07:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-04 15:07:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2024-11-04 15:07:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 51 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2024-11-04 15:07:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2024-11-04 15:07:20,087 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 96 [2024-11-04 15:07:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:20,088 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2024-11-04 15:07:20,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-04 15:07:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2024-11-04 15:07:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-04 15:07:20,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:20,091 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:20,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-04 15:07:20,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:20,292 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:20,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1252523644, now seen corresponding path program 1 times [2024-11-04 15:07:20,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:20,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61980345] [2024-11-04 15:07:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:20,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:20,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:20,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-04 15:07:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:20,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-04 15:07:20,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:20,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:07:20,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:07:25,003 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$#2.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) (_ bv0 64)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$#2.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|))))) is different from true [2024-11-04 15:07:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-04 15:07:25,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-04 15:07:25,864 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:25,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61980345] [2024-11-04 15:07:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [61980345] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:07:25,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:07:25,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2024-11-04 15:07:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057456264] [2024-11-04 15:07:25,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:07:25,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-04 15:07:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-04 15:07:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2024-11-04 15:07:25,866 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-04 15:07:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:27,238 INFO L93 Difference]: Finished difference Result 168 states and 230 transitions. [2024-11-04 15:07:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-04 15:07:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 98 [2024-11-04 15:07:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:27,245 INFO L225 Difference]: With dead ends: 168 [2024-11-04 15:07:27,245 INFO L226 Difference]: Without dead ends: 113 [2024-11-04 15:07:27,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=76, Invalid=347, Unknown=1, NotChecked=38, Total=462 [2024-11-04 15:07:27,246 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 60 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:27,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 626 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 335 Invalid, 1 Unknown, 269 Unchecked, 1.0s Time] [2024-11-04 15:07:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-04 15:07:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2024-11-04 15:07:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 67 states have internal predecessors, (83), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-04 15:07:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2024-11-04 15:07:27,258 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 98 [2024-11-04 15:07:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:27,259 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2024-11-04 15:07:27,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-04 15:07:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2024-11-04 15:07:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-04 15:07:27,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:27,260 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:27,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-04 15:07:27,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:27,461 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:27,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash 479996356, now seen corresponding path program 1 times [2024-11-04 15:07:27,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:27,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792129397] [2024-11-04 15:07:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:27,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:27,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:27,464 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:27,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-04 15:07:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:27,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-04 15:07:27,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-04 15:07:27,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-04 15:07:27,719 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:27,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792129397] [2024-11-04 15:07:27,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [792129397] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:27,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:27,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-04 15:07:27,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495404319] [2024-11-04 15:07:27,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:27,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 15:07:27,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 15:07:27,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:27,722 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-04 15:07:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:27,755 INFO L93 Difference]: Finished difference Result 161 states and 216 transitions. [2024-11-04 15:07:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 15:07:27,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 98 [2024-11-04 15:07:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:27,757 INFO L225 Difference]: With dead ends: 161 [2024-11-04 15:07:27,757 INFO L226 Difference]: Without dead ends: 88 [2024-11-04 15:07:27,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:27,758 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:27,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 234 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-04 15:07:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2024-11-04 15:07:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 67 states have internal predecessors, (82), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-04 15:07:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2024-11-04 15:07:27,772 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 98 [2024-11-04 15:07:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:27,772 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2024-11-04 15:07:27,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-04 15:07:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2024-11-04 15:07:27,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-04 15:07:27,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:27,773 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:27,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-04 15:07:27,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:27,974 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:27,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:27,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1800233476, now seen corresponding path program 1 times [2024-11-04 15:07:27,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:27,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261010782] [2024-11-04 15:07:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:27,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:27,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:27,977 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:27,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-04 15:07:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:28,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-04 15:07:28,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-04 15:07:28,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-04 15:07:28,216 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:28,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261010782] [2024-11-04 15:07:28,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261010782] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 15:07:28,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 15:07:28,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-04 15:07:28,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546733935] [2024-11-04 15:07:28,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:28,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 15:07:28,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:28,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 15:07:28,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:28,218 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-04 15:07:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:28,247 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2024-11-04 15:07:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 15:07:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 98 [2024-11-04 15:07:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:28,250 INFO L225 Difference]: With dead ends: 160 [2024-11-04 15:07:28,250 INFO L226 Difference]: Without dead ends: 87 [2024-11-04 15:07:28,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-04 15:07:28,251 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:28,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 235 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-04 15:07:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2024-11-04 15:07:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 64 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-04 15:07:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2024-11-04 15:07:28,259 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 98 [2024-11-04 15:07:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:28,260 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2024-11-04 15:07:28,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-04 15:07:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2024-11-04 15:07:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-04 15:07:28,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:28,261 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:28,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:28,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:28,462 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:28,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:28,462 INFO L85 PathProgramCache]: Analyzing trace with hash -596272544, now seen corresponding path program 1 times [2024-11-04 15:07:28,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:28,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845969572] [2024-11-04 15:07:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:28,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:28,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:28,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-04 15:07:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:28,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-04 15:07:28,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 15:07:28,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-04 15:07:28,797 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:28,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845969572] [2024-11-04 15:07:28,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845969572] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:28,798 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:28,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2024-11-04 15:07:28,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682951907] [2024-11-04 15:07:28,798 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:28,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 15:07:28,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 15:07:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-04 15:07:28,800 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-04 15:07:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:28,838 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2024-11-04 15:07:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 15:07:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 100 [2024-11-04 15:07:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:28,839 INFO L225 Difference]: With dead ends: 94 [2024-11-04 15:07:28,839 INFO L226 Difference]: Without dead ends: 92 [2024-11-04 15:07:28,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-04 15:07:28,840 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 6 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:28,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 387 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-04 15:07:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-04 15:07:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2024-11-04 15:07:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 69 states have internal predecessors, (81), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-04 15:07:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2024-11-04 15:07:28,858 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 100 [2024-11-04 15:07:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:28,858 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2024-11-04 15:07:28,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-04 15:07:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2024-11-04 15:07:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-04 15:07:28,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:28,860 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:28,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:29,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:29,061 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:29,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash 81682848, now seen corresponding path program 1 times [2024-11-04 15:07:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:29,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504884042] [2024-11-04 15:07:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:29,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:29,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:29,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-04 15:07:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:29,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-04 15:07:29,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:29,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:07:29,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:07:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-04 15:07:31,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-04 15:07:32,039 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:32,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504884042] [2024-11-04 15:07:32,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [504884042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:07:32,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:07:32,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2024-11-04 15:07:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274443099] [2024-11-04 15:07:32,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:07:32,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-04 15:07:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:32,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-04 15:07:32,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-04 15:07:32,041 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 19 states have internal predecessors, (132), 10 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-04 15:07:36,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:07:41,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:07:45,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:07:49,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:07:53,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:07:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:07:55,481 INFO L93 Difference]: Finished difference Result 212 states and 263 transitions. [2024-11-04 15:07:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-04 15:07:55,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 19 states have internal predecessors, (132), 10 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) Word has length 106 [2024-11-04 15:07:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:07:55,483 INFO L225 Difference]: With dead ends: 212 [2024-11-04 15:07:55,483 INFO L226 Difference]: Without dead ends: 134 [2024-11-04 15:07:55,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 187 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2024-11-04 15:07:55,485 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 94 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 38 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2024-11-04 15:07:55,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 718 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 418 Invalid, 4 Unknown, 0 Unchecked, 22.6s Time] [2024-11-04 15:07:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-04 15:07:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2024-11-04 15:07:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 104 states have internal predecessors, (122), 17 states have call successors, (17), 11 states have call predecessors, (17), 13 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-04 15:07:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 161 transitions. [2024-11-04 15:07:55,502 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 161 transitions. Word has length 106 [2024-11-04 15:07:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:07:55,504 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 161 transitions. [2024-11-04 15:07:55,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 19 states have internal predecessors, (132), 10 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-04 15:07:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 161 transitions. [2024-11-04 15:07:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-04 15:07:55,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:07:55,506 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:07:55,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-04 15:07:55,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:55,707 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:07:55,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:07:55,707 INFO L85 PathProgramCache]: Analyzing trace with hash -929434402, now seen corresponding path program 1 times [2024-11-04 15:07:55,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:07:55,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453398051] [2024-11-04 15:07:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:07:55,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:07:55,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:07:55,709 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:07:55,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-04 15:07:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:07:55,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-04 15:07:55,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:07:56,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-04 15:07:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-04 15:07:56,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2024-11-04 15:07:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-04 15:07:58,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:07:58,976 INFO L349 Elim1Store]: treesize reduction 19, result has 62.0 percent of original size [2024-11-04 15:07:58,977 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 103 [2024-11-04 15:07:59,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-04 15:07:59,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 97 [2024-11-04 15:07:59,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2024-11-04 15:07:59,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-04 15:07:59,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-04 15:07:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-04 15:07:59,497 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:07:59,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453398051] [2024-11-04 15:07:59,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453398051] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 15:07:59,497 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 15:07:59,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 19 [2024-11-04 15:07:59,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326760051] [2024-11-04 15:07:59,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 15:07:59,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-04 15:07:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:07:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-04 15:07:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-04 15:07:59,499 INFO L87 Difference]: Start difference. First operand 132 states and 161 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 9 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-04 15:08:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:08:02,797 INFO L93 Difference]: Finished difference Result 322 states and 396 transitions. [2024-11-04 15:08:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-04 15:08:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 9 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 106 [2024-11-04 15:08:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:08:02,800 INFO L225 Difference]: With dead ends: 322 [2024-11-04 15:08:02,800 INFO L226 Difference]: Without dead ends: 250 [2024-11-04 15:08:02,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 186 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2024-11-04 15:08:02,801 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 70 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-04 15:08:02,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 590 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-04 15:08:02,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-04 15:08:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 132. [2024-11-04 15:08:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 101 states have (on average 1.198019801980198) internal successors, (121), 104 states have internal predecessors, (121), 17 states have call successors, (17), 11 states have call predecessors, (17), 13 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-04 15:08:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2024-11-04 15:08:02,823 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 106 [2024-11-04 15:08:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:08:02,824 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2024-11-04 15:08:02,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 9 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-04 15:08:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2024-11-04 15:08:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-04 15:08:02,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:08:02,825 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:08:02,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-04 15:08:03,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:03,026 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:08:03,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:08:03,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1950502756, now seen corresponding path program 1 times [2024-11-04 15:08:03,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:08:03,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250823290] [2024-11-04 15:08:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:08:03,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:03,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:08:03,028 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:08:03,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-04 15:08:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:03,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-04 15:08:03,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:03,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:08:03,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-04 15:08:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-04 15:08:06,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:08:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-04 15:08:07,862 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:08:07,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250823290] [2024-11-04 15:08:07,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [250823290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:08:07,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:08:07,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2024-11-04 15:08:07,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214564455] [2024-11-04 15:08:07,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:08:07,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-04 15:08:07,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:08:07,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-04 15:08:07,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-11-04 15:08:07,865 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand has 25 states, 25 states have (on average 5.16) internal successors, (129), 23 states have internal predecessors, (129), 10 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-04 15:08:11,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:08:16,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:08:20,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:08:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 15:08:24,227 INFO L93 Difference]: Finished difference Result 198 states and 241 transitions. [2024-11-04 15:08:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-04 15:08:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.16) internal successors, (129), 23 states have internal predecessors, (129), 10 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) Word has length 106 [2024-11-04 15:08:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 15:08:24,229 INFO L225 Difference]: With dead ends: 198 [2024-11-04 15:08:24,229 INFO L226 Difference]: Without dead ends: 132 [2024-11-04 15:08:24,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 182 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2024-11-04 15:08:24,231 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 107 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 36 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2024-11-04 15:08:24,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 955 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 659 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2024-11-04 15:08:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-04 15:08:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-11-04 15:08:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 101 states have (on average 1.188118811881188) internal successors, (120), 104 states have internal predecessors, (120), 17 states have call successors, (17), 11 states have call predecessors, (17), 13 states have return successors, (22), 16 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-04 15:08:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2024-11-04 15:08:24,255 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 106 [2024-11-04 15:08:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 15:08:24,255 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2024-11-04 15:08:24,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.16) internal successors, (129), 23 states have internal predecessors, (129), 10 states have call successors, (21), 4 states have call predecessors, (21), 7 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-04 15:08:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2024-11-04 15:08:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-04 15:08:24,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 15:08:24,256 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-04 15:08:24,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-04 15:08:24,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:24,457 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 15:08:24,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 15:08:24,458 INFO L85 PathProgramCache]: Analyzing trace with hash 350319834, now seen corresponding path program 1 times [2024-11-04 15:08:24,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 15:08:24,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542203190] [2024-11-04 15:08:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 15:08:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-04 15:08:24,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 15:08:24,460 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-04 15:08:24,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-04 15:08:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 15:08:24,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-04 15:08:24,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 15:08:24,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-04 15:08:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-04 15:08:27,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 15:08:30,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2024-11-04 15:08:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-04 15:08:30,415 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 15:08:30,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542203190] [2024-11-04 15:08:30,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [542203190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 15:08:30,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 15:08:30,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2024-11-04 15:08:30,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661746709] [2024-11-04 15:08:30,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 15:08:30,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-04 15:08:30,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 15:08:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-04 15:08:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-04 15:08:30,417 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 26 states have internal predecessors, (136), 12 states have call successors, (21), 3 states have call predecessors, (21), 7 states have return successors, (20), 11 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-04 15:08:33,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-04 15:08:35,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]