./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_remove_harness.i --full-output --preprocessor.use.memory.slicer true --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version abd6749d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_remove_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-?-abd6749-m [2023-11-23 07:30:48,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 07:30:48,981 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 07:30:48,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 07:30:48,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 07:30:49,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 07:30:49,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 07:30:49,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 07:30:49,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 07:30:49,016 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 07:30:49,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 07:30:49,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 07:30:49,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 07:30:49,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 07:30:49,019 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 07:30:49,019 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 07:30:49,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 07:30:49,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 07:30:49,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 07:30:49,020 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 07:30:49,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 07:30:49,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 07:30:49,021 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 07:30:49,022 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 07:30:49,022 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 07:30:49,022 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 07:30:49,022 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 07:30:49,023 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 07:30:49,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:30:49,023 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 07:30:49,024 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 07:30:49,024 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 07:30:49,024 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 07:30:49,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 07:30:49,025 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 07:30:49,025 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 07:30:49,025 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 07:30:49,025 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 07:30:49,025 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 07:30:49,026 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-23 07:30:49,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 07:30:49,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 07:30:49,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 07:30:49,244 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 07:30:49,245 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 07:30:49,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/aws-c-common/aws_linked_list_remove_harness.i [2023-11-23 07:30:50,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 07:30:50,708 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 07:30:50,709 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/aws-c-common/aws_linked_list_remove_harness.i [2023-11-23 07:30:50,742 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/585c6dde3/f586e4ea65e844d392bc30f741535e94/FLAG086f2b8d0 [2023-11-23 07:30:50,758 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/585c6dde3/f586e4ea65e844d392bc30f741535e94 [2023-11-23 07:30:50,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 07:30:50,762 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 07:30:50,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 07:30:50,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 07:30:50,816 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 07:30:50,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:30:50" (1/1) ... [2023-11-23 07:30:50,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e42bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:50, skipping insertion in model container [2023-11-23 07:30:50,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:30:50" (1/1) ... [2023-11-23 07:30:50,884 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 07:30:51,060 WARN L240 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_remove_harness.i[4496,4509] [2023-11-23 07:30:51,065 WARN L240 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_remove_harness.i[4556,4569] [2023-11-23 07:30:51,539 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,543 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,543 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,544 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,545 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,558 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,560 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,561 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,561 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,562 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:51,785 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:30:51,786 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:30:51,787 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:30:51,789 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:30:51,789 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:30:51,790 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:30:51,790 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:30:51,791 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:30:51,791 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:30:51,792 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:30:51,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:30:51,933 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 07:30:51,971 WARN L240 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_remove_harness.i[4496,4509] [2023-11-23 07:30:51,972 WARN L240 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_remove_harness.i[4556,4569] [2023-11-23 07:30:52,036 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,037 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,037 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,038 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,038 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,046 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,047 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,049 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,049 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,050 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 07:30:52,089 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 07:30:52,090 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 07:30:52,090 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 07:30:52,091 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 07:30:52,092 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 07:30:52,092 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 07:30:52,093 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 07:30:52,094 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 07:30:52,094 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 07:30:52,094 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 07:30:52,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 07:30:52,261 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,262 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,263 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,263 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,263 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,263 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,263 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 07:30:52,269 INFO L206 MainTranslator]: Completed translation [2023-11-23 07:30:52,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52 WrapperNode [2023-11-23 07:30:52,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 07:30:52,270 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 07:30:52,270 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 07:30:52,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 07:30:52,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,345 INFO L138 Inliner]: procedures = 678, calls = 1048, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 87 [2023-11-23 07:30:52,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 07:30:52,346 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 07:30:52,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 07:30:52,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 07:30:52,356 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,383 INFO L188 MemorySlicer]: Split 30 memory accesses to 4 slices as follows [2, 23, 5, 0]. 77 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 7 writes are split as follows [0, 7, 0, 0]. [2023-11-23 07:30:52,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,383 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,393 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,399 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 07:30:52,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 07:30:52,404 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 07:30:52,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 07:30:52,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (1/1) ... [2023-11-23 07:30:52,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 07:30:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:30:52,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 07:30:52,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 07:30:52,477 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 07:30:52,478 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 07:30:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2023-11-23 07:30:52,478 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2023-11-23 07:30:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 07:30:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 07:30:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 07:30:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 07:30:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 07:30:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 07:30:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 07:30:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-23 07:30:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-23 07:30:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 07:30:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 07:30:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 07:30:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 07:30:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 07:30:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 07:30:52,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 07:30:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2023-11-23 07:30:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2023-11-23 07:30:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2023-11-23 07:30:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#3 [2023-11-23 07:30:52,480 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2023-11-23 07:30:52,480 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2023-11-23 07:30:52,480 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2023-11-23 07:30:52,481 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#3 [2023-11-23 07:30:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 07:30:52,481 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 07:30:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 07:30:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 07:30:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 07:30:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 07:30:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 07:30:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-23 07:30:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-23 07:30:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-23 07:30:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-23 07:30:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2023-11-23 07:30:52,482 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2023-11-23 07:30:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 07:30:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 07:30:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 07:30:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 07:30:52,652 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 07:30:52,654 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 07:30:52,864 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 07:30:52,905 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 07:30:52,905 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 07:30:52,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:30:52 BoogieIcfgContainer [2023-11-23 07:30:52,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 07:30:52,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 07:30:52,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 07:30:52,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 07:30:52,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 07:30:50" (1/3) ... [2023-11-23 07:30:52,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e82c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:30:52, skipping insertion in model container [2023-11-23 07:30:52,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:30:52" (2/3) ... [2023-11-23 07:30:52,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e82c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 07:30:52, skipping insertion in model container [2023-11-23 07:30:52,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:30:52" (3/3) ... [2023-11-23 07:30:52,912 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2023-11-23 07:30:52,924 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 07:30:52,924 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 07:30:52,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 07:30:52,973 INFO L357 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, mHoare=true, 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;@370adb56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 07:30:52,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 07:30:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 07:30:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 07:30:52,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:30:52,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:30:52,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:30:52,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:30:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash 358319961, now seen corresponding path program 1 times [2023-11-23 07:30:52,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:30:53,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433581613] [2023-11-23 07:30:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:30:53,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:30:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:53,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:30:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:53,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:30:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:30:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:53,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:30:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:53,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:30:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:53,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-23 07:30:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:53,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:30:53,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433581613] [2023-11-23 07:30:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433581613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:30:53,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:30:53,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 07:30:53,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040643976] [2023-11-23 07:30:53,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:30:53,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 07:30:53,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:30:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 07:30:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 07:30:53,457 INFO L87 Difference]: Start difference. First operand has 64 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 07:30:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:30:53,508 INFO L93 Difference]: Finished difference Result 123 states and 176 transitions. [2023-11-23 07:30:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 07:30:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2023-11-23 07:30:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:30:53,524 INFO L225 Difference]: With dead ends: 123 [2023-11-23 07:30:53,524 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 07:30:53,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 07:30:53,530 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:30:53,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 07:30:53,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 07:30:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-23 07:30:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 38 states have internal predecessors, (46), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-23 07:30:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-11-23 07:30:53,573 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 45 [2023-11-23 07:30:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:30:53,574 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-11-23 07:30:53,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 07:30:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-11-23 07:30:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 07:30:53,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:30:53,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:30:53,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 07:30:53,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:30:53,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:30:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2026785824, now seen corresponding path program 1 times [2023-11-23 07:30:53,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:30:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632881415] [2023-11-23 07:30:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:30:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:30:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:30:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:30:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:30:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:30:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:30:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:30:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 07:30:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:54,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:30:54,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632881415] [2023-11-23 07:30:54,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632881415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:30:54,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:30:54,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 07:30:54,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137868249] [2023-11-23 07:30:54,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:30:54,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 07:30:54,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:30:54,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 07:30:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:30:54,294 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 07:30:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:30:54,780 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2023-11-23 07:30:54,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 07:30:54,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-23 07:30:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:30:54,783 INFO L225 Difference]: With dead ends: 124 [2023-11-23 07:30:54,783 INFO L226 Difference]: Without dead ends: 69 [2023-11-23 07:30:54,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-23 07:30:54,784 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 53 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:30:54,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 160 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 07:30:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-23 07:30:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2023-11-23 07:30:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.25) internal successors, (50), 42 states have internal predecessors, (50), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-23 07:30:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2023-11-23 07:30:54,792 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 50 [2023-11-23 07:30:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:30:54,793 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2023-11-23 07:30:54,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 07:30:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2023-11-23 07:30:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 07:30:54,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:30:54,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:30:54,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 07:30:54,794 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:30:54,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:30:54,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2004153570, now seen corresponding path program 1 times [2023-11-23 07:30:54,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:30:54,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018488683] [2023-11-23 07:30:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:30:54,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:30:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:30:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:30:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:30:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:30:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:30:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:30:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 07:30:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:54,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:30:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018488683] [2023-11-23 07:30:54,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018488683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:30:54,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:30:54,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 07:30:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841511933] [2023-11-23 07:30:54,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:30:54,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 07:30:54,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:30:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 07:30:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:30:54,979 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 07:30:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:30:55,209 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2023-11-23 07:30:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:30:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 50 [2023-11-23 07:30:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:30:55,210 INFO L225 Difference]: With dead ends: 78 [2023-11-23 07:30:55,210 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 07:30:55,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:30:55,211 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 42 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:30:55,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 157 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:30:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 07:30:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2023-11-23 07:30:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 47 states have internal predecessors, (54), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2023-11-23 07:30:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2023-11-23 07:30:55,218 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 50 [2023-11-23 07:30:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:30:55,219 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2023-11-23 07:30:55,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 07:30:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2023-11-23 07:30:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 07:30:55,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:30:55,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:30:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 07:30:55,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:30:55,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:30:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash -722751527, now seen corresponding path program 1 times [2023-11-23 07:30:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:30:55,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283623271] [2023-11-23 07:30:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:30:55,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:30:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:30:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:30:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:30:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:30:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:30:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:30:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-23 07:30:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:55,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:30:55,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283623271] [2023-11-23 07:30:55,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283623271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:30:55,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:30:55,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 07:30:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972556850] [2023-11-23 07:30:55,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:30:55,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 07:30:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:30:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 07:30:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 07:30:55,521 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 07:30:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:30:55,735 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2023-11-23 07:30:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 07:30:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-23 07:30:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:30:55,740 INFO L225 Difference]: With dead ends: 130 [2023-11-23 07:30:55,741 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 07:30:55,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:30:55,745 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:30:55,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 104 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:30:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 07:30:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-23 07:30:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 48 states have internal predecessors, (55), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2023-11-23 07:30:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2023-11-23 07:30:55,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 50 [2023-11-23 07:30:55,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:30:55,752 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2023-11-23 07:30:55,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 07:30:55,753 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2023-11-23 07:30:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 07:30:55,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:30:55,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:30:55,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 07:30:55,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:30:55,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:30:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1566073113, now seen corresponding path program 1 times [2023-11-23 07:30:55,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:30:55,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450845528] [2023-11-23 07:30:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:30:55,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:30:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:30:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:30:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:30:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:30:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:30:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:55,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:30:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:56,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-23 07:30:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:56,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:30:56,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450845528] [2023-11-23 07:30:56,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450845528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:30:56,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450075067] [2023-11-23 07:30:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:30:56,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:30:56,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:30:56,037 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) [2023-11-23 07:30:56,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 07:30:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:56,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 07:30:56,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:30:56,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:30:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:56,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:30:56,622 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 14 treesize of output 12 [2023-11-23 07:30:56,626 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 16 treesize of output 14 [2023-11-23 07:30:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:56,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450075067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:30:56,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:30:56,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 19 [2023-11-23 07:30:56,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380284326] [2023-11-23 07:30:56,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:30:56,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 07:30:56,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:30:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 07:30:56,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-23 07:30:56,669 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 19 states, 14 states have (on average 3.5) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-23 07:30:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:30:57,319 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2023-11-23 07:30:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 07:30:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 3.5) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 51 [2023-11-23 07:30:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:30:57,323 INFO L225 Difference]: With dead ends: 139 [2023-11-23 07:30:57,323 INFO L226 Difference]: Without dead ends: 81 [2023-11-23 07:30:57,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-23 07:30:57,324 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 67 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:30:57,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 233 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 07:30:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-23 07:30:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2023-11-23 07:30:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 8 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2023-11-23 07:30:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2023-11-23 07:30:57,331 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 51 [2023-11-23 07:30:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:30:57,332 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2023-11-23 07:30:57,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 3.5) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-23 07:30:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2023-11-23 07:30:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 07:30:57,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:30:57,333 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 07:30:57,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 07:30:57,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:30:57,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:30:57,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:30:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1209442586, now seen corresponding path program 1 times [2023-11-23 07:30:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:30:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658305912] [2023-11-23 07:30:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:30:57,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:30:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:57,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:30:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:57,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:30:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:57,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:30:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:57,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:30:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:30:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:57,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:30:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:57,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-23 07:30:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 07:30:57,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:30:57,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658305912] [2023-11-23 07:30:57,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658305912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:30:57,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138494275] [2023-11-23 07:30:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:30:57,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:30:57,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:30:57,880 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) [2023-11-23 07:30:57,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 07:30:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:30:58,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 07:30:58,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:30:58,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 07:30:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:58,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:30:58,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 07:30:58,543 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 18 treesize of output 14 [2023-11-23 07:30:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:30:58,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138494275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:30:58,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:30:58,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 23 [2023-11-23 07:30:58,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469270086] [2023-11-23 07:30:58,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:30:58,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 07:30:58,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:30:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 07:30:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-11-23 07:30:58,627 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:30:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:30:59,844 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2023-11-23 07:30:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 07:30:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 54 [2023-11-23 07:30:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:30:59,846 INFO L225 Difference]: With dead ends: 162 [2023-11-23 07:30:59,846 INFO L226 Difference]: Without dead ends: 100 [2023-11-23 07:30:59,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-11-23 07:30:59,847 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 101 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:30:59,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 340 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 07:30:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-23 07:30:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2023-11-23 07:30:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.25) internal successors, (75), 62 states have internal predecessors, (75), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:30:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2023-11-23 07:30:59,861 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 54 [2023-11-23 07:30:59,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:30:59,862 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2023-11-23 07:30:59,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:30:59,862 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2023-11-23 07:30:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 07:30:59,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:30:59,869 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 07:30:59,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 07:31:00,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 07:31:00,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:31:00,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:31:00,097 INFO L85 PathProgramCache]: Analyzing trace with hash 772733313, now seen corresponding path program 2 times [2023-11-23 07:31:00,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:31:00,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911766568] [2023-11-23 07:31:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:00,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:31:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:00,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:31:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:00,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:31:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:00,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:31:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:00,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:31:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:00,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:31:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:00,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:31:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:00,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-23 07:31:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 07:31:00,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:31:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911766568] [2023-11-23 07:31:00,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911766568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279428675] [2023-11-23 07:31:00,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:31:00,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:00,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:31:00,458 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) [2023-11-23 07:31:00,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 07:31:00,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:31:00,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:31:00,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-23 07:31:00,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:31:00,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:31:00,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:31:00,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:00,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:31:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:31:01,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:31:01,827 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 28 treesize of output 26 [2023-11-23 07:31:01,830 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 36 treesize of output 32 [2023-11-23 07:31:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:31:01,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279428675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:31:01,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:31:01,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 15] total 31 [2023-11-23 07:31:01,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287999753] [2023-11-23 07:31:01,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:31:01,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 07:31:01,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:31:01,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 07:31:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2023-11-23 07:31:01,873 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 31 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:31:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:31:04,502 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2023-11-23 07:31:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 07:31:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 57 [2023-11-23 07:31:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:31:04,503 INFO L225 Difference]: With dead ends: 161 [2023-11-23 07:31:04,503 INFO L226 Difference]: Without dead ends: 103 [2023-11-23 07:31:04,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=271, Invalid=2279, Unknown=0, NotChecked=0, Total=2550 [2023-11-23 07:31:04,504 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 138 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:31:04,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 421 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 07:31:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-23 07:31:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2023-11-23 07:31:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.253968253968254) internal successors, (79), 65 states have internal predecessors, (79), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:31:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2023-11-23 07:31:04,513 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 57 [2023-11-23 07:31:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:31:04,514 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2023-11-23 07:31:04,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:31:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2023-11-23 07:31:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 07:31:04,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:31:04,515 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1] [2023-11-23 07:31:04,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 07:31:04,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:04,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:31:04,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:31:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash 289761369, now seen corresponding path program 1 times [2023-11-23 07:31:04,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:31:04,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333073602] [2023-11-23 07:31:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:04,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:31:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:04,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:31:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:04,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:31:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:04,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:31:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:04,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:31:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:31:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:04,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:31:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 07:31:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-23 07:31:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:31:05,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:31:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333073602] [2023-11-23 07:31:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333073602] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036830576] [2023-11-23 07:31:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:05,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:31:05,122 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) [2023-11-23 07:31:05,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 07:31:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 07:31:05,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:31:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 07:31:05,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:31:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 07:31:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036830576] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:05,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:31:05,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 14 [2023-11-23 07:31:05,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896319771] [2023-11-23 07:31:05,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:31:05,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 07:31:05,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:31:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 07:31:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:31:05,423 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 07:31:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:31:05,471 INFO L93 Difference]: Finished difference Result 135 states and 166 transitions. [2023-11-23 07:31:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 07:31:05,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-11-23 07:31:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:31:05,473 INFO L225 Difference]: With dead ends: 135 [2023-11-23 07:31:05,473 INFO L226 Difference]: Without dead ends: 93 [2023-11-23 07:31:05,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-23 07:31:05,474 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 07:31:05,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 207 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 07:31:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-23 07:31:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-23 07:31:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 65 states have internal predecessors, (78), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:31:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2023-11-23 07:31:05,486 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 61 [2023-11-23 07:31:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:31:05,486 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2023-11-23 07:31:05,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 07:31:05,486 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2023-11-23 07:31:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-23 07:31:05,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:31:05,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:31:05,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 07:31:05,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:05,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:31:05,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:31:05,701 INFO L85 PathProgramCache]: Analyzing trace with hash -417755776, now seen corresponding path program 3 times [2023-11-23 07:31:05,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:31:05,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079643643] [2023-11-23 07:31:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:05,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:31:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:31:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:31:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:31:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:31:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:31:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:05,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:31:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:06,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-23 07:31:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 07:31:06,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:31:06,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079643643] [2023-11-23 07:31:06,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079643643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:06,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575392965] [2023-11-23 07:31:06,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:31:06,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:06,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:31:06,065 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) [2023-11-23 07:31:06,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 07:31:06,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 07:31:06,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:31:06,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-23 07:31:06,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:31:06,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:31:06,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:31:06,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:06,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:31:06,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:06,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 07:31:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 07:31:06,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:31:06,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575392965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:06,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 07:31:06,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-11-23 07:31:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197074092] [2023-11-23 07:31:06,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 07:31:06,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 07:31:06,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:31:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 07:31:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2023-11-23 07:31:06,862 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 07:31:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:31:07,343 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2023-11-23 07:31:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 07:31:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2023-11-23 07:31:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:31:07,344 INFO L225 Difference]: With dead ends: 152 [2023-11-23 07:31:07,344 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 07:31:07,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-11-23 07:31:07,345 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:31:07,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 253 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 07:31:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 07:31:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-23 07:31:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.234375) internal successors, (79), 66 states have internal predecessors, (79), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:31:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2023-11-23 07:31:07,353 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 60 [2023-11-23 07:31:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:31:07,353 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2023-11-23 07:31:07,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 07:31:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2023-11-23 07:31:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 07:31:07,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:31:07,354 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:31:07,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 07:31:07,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:07,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:31:07,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:31:07,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1367833842, now seen corresponding path program 4 times [2023-11-23 07:31:07,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:31:07,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753880771] [2023-11-23 07:31:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:07,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:31:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:07,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:31:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:07,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:31:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:07,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:31:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:07,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:31:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:31:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:07,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:31:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:07,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-23 07:31:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 07:31:07,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:31:07,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753880771] [2023-11-23 07:31:07,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753880771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799386842] [2023-11-23 07:31:07,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:31:07,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:07,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:31:07,954 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) [2023-11-23 07:31:07,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 07:31:08,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:31:08,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:31:08,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-23 07:31:08,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:31:08,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 07:31:08,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-23 07:31:08,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:08,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-11-23 07:31:08,341 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:08,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2023-11-23 07:31:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 07:31:08,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:31:09,504 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 69 treesize of output 65 [2023-11-23 07:31:09,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:09,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 73 treesize of output 65 [2023-11-23 07:31:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:31:09,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799386842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:31:09,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:31:09,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 17] total 31 [2023-11-23 07:31:09,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755836255] [2023-11-23 07:31:09,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:31:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 07:31:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:31:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 07:31:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2023-11-23 07:31:09,596 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 31 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 30 states have internal predecessors, (65), 3 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 07:31:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:31:11,845 INFO L93 Difference]: Finished difference Result 179 states and 231 transitions. [2023-11-23 07:31:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 07:31:11,845 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 30 states have internal predecessors, (65), 3 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 61 [2023-11-23 07:31:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:31:11,847 INFO L225 Difference]: With dead ends: 179 [2023-11-23 07:31:11,847 INFO L226 Difference]: Without dead ends: 121 [2023-11-23 07:31:11,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=376, Invalid=1786, Unknown=0, NotChecked=0, Total=2162 [2023-11-23 07:31:11,848 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 66 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:31:11,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 392 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 07:31:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-23 07:31:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2023-11-23 07:31:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 80 states have internal predecessors, (99), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2023-11-23 07:31:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2023-11-23 07:31:11,860 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 61 [2023-11-23 07:31:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:31:11,860 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2023-11-23 07:31:11,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 30 states have internal predecessors, (65), 3 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 07:31:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2023-11-23 07:31:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 07:31:11,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:31:11,861 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1] [2023-11-23 07:31:11,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-23 07:31:12,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:12,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:31:12,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:31:12,075 INFO L85 PathProgramCache]: Analyzing trace with hash 806477996, now seen corresponding path program 1 times [2023-11-23 07:31:12,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:31:12,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752423449] [2023-11-23 07:31:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:12,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:31:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:31:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:31:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:31:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:31:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:31:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:31:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-23 07:31:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-23 07:31:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 07:31:12,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:31:12,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752423449] [2023-11-23 07:31:12,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752423449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:12,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549184010] [2023-11-23 07:31:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:12,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:12,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:31:12,494 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) [2023-11-23 07:31:12,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 07:31:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:12,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 07:31:12,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:31:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 07:31:12,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:31:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 07:31:12,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549184010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:31:12,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:31:12,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 19 [2023-11-23 07:31:12,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150821905] [2023-11-23 07:31:12,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:31:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 07:31:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:31:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 07:31:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-23 07:31:12,880 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 07:31:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:31:13,515 INFO L93 Difference]: Finished difference Result 177 states and 225 transitions. [2023-11-23 07:31:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 07:31:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 65 [2023-11-23 07:31:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:31:13,518 INFO L225 Difference]: With dead ends: 177 [2023-11-23 07:31:13,518 INFO L226 Difference]: Without dead ends: 109 [2023-11-23 07:31:13,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 07:31:13,520 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 07:31:13,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 320 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 07:31:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-23 07:31:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-23 07:31:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.25) internal successors, (95), 80 states have internal predecessors, (95), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2023-11-23 07:31:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2023-11-23 07:31:13,544 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 65 [2023-11-23 07:31:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:31:13,544 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2023-11-23 07:31:13,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 07:31:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2023-11-23 07:31:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 07:31:13,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:31:13,546 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:31:13,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 07:31:13,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:13,758 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:31:13,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:31:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 36748635, now seen corresponding path program 5 times [2023-11-23 07:31:13,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:31:13,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546749642] [2023-11-23 07:31:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:13,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:31:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:13,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:31:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:14,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:31:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:14,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:31:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:14,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:31:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:14,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:31:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:14,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:31:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:14,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-23 07:31:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 07:31:14,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:31:14,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546749642] [2023-11-23 07:31:14,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546749642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:14,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719576778] [2023-11-23 07:31:14,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 07:31:14,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:14,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:31:14,248 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) [2023-11-23 07:31:14,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 07:31:15,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-23 07:31:15,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:31:15,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-23 07:31:15,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:31:15,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:31:15,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:31:15,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:15,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:31:15,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:15,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 07:31:15,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:15,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-23 07:31:15,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:15,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-23 07:31:15,396 INFO L349 Elim1Store]: treesize reduction 106, result has 33.3 percent of original size [2023-11-23 07:31:15,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 77 [2023-11-23 07:31:19,023 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_11| Int) (|v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_13| Int)) (let ((.cse1 (select |c_#memory_int#1| |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_11|))) (let ((.cse0 (select .cse1 (+ |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_13| 2)))) (and (= .cse0 (select .cse1 (+ |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_13| 4))) (= .cse0 (select .cse1 (+ |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_13| 5))) (= .cse0 (select .cse1 (+ |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_13| 1))) (= .cse0 (select .cse1 (+ |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_13| 3))) (= .cse0 (select .cse1 |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_13|)) (exists ((|v_#Ultimate.C_memset#1_#t~loopctr685_81| Int)) (and (= .cse0 (select .cse1 (+ |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_13| |v_#Ultimate.C_memset#1_#t~loopctr685_81|))) (<= 6 |v_#Ultimate.C_memset#1_#t~loopctr685_81|))))))) is different from true [2023-11-23 07:31:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:31:19,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:31:22,086 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 103 treesize of output 99 [2023-11-23 07:31:22,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:22,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4151 treesize of output 4143 [2023-11-23 07:31:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:31:22,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719576778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:31:22,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:31:22,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20, 19] total 46 [2023-11-23 07:31:22,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678767298] [2023-11-23 07:31:22,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:31:22,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-23 07:31:22,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:31:22,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-23 07:31:22,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1797, Unknown=2, NotChecked=86, Total=2070 [2023-11-23 07:31:22,335 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 46 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:31:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:31:40,147 INFO L93 Difference]: Finished difference Result 178 states and 221 transitions. [2023-11-23 07:31:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 07:31:40,148 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2023-11-23 07:31:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:31:40,148 INFO L225 Difference]: With dead ends: 178 [2023-11-23 07:31:40,148 INFO L226 Difference]: Without dead ends: 114 [2023-11-23 07:31:40,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=334, Invalid=3443, Unknown=9, NotChecked=120, Total=3906 [2023-11-23 07:31:40,150 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 07:31:40,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 479 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1492 Invalid, 0 Unknown, 106 Unchecked, 1.8s Time] [2023-11-23 07:31:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-23 07:31:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2023-11-23 07:31:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 82 states have internal predecessors, (97), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2023-11-23 07:31:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2023-11-23 07:31:40,167 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 65 [2023-11-23 07:31:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:31:40,168 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2023-11-23 07:31:40,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:31:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2023-11-23 07:31:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 07:31:40,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:31:40,169 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:31:40,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 07:31:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 07:31:40,372 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:31:40,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:31:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash -900796198, now seen corresponding path program 6 times [2023-11-23 07:31:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:31:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258548243] [2023-11-23 07:31:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:31:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:40,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:31:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:40,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:31:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:40,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:31:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:40,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:31:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:40,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:31:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:40,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:31:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:40,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-23 07:31:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 07:31:40,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:31:40,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258548243] [2023-11-23 07:31:40,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258548243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:40,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39099317] [2023-11-23 07:31:40,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 07:31:40,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:40,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:31:40,901 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) [2023-11-23 07:31:40,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 07:31:42,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-23 07:31:42,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:31:42,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-23 07:31:42,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:31:42,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:31:42,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:31:42,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:42,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:31:42,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:42,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 07:31:42,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:42,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-23 07:31:42,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:42,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-23 07:31:42,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:42,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-23 07:31:42,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:42,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-23 07:31:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 07:31:42,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:31:45,350 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 58 treesize of output 56 [2023-11-23 07:31:45,353 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 89 treesize of output 85 [2023-11-23 07:31:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:31:45,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39099317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:31:45,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:31:45,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 24] total 48 [2023-11-23 07:31:45,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699329285] [2023-11-23 07:31:45,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:31:45,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-23 07:31:45,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:31:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-23 07:31:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2023-11-23 07:31:45,433 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 48 states, 42 states have (on average 2.0) internal successors, (84), 44 states have internal predecessors, (84), 7 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-23 07:31:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:31:50,246 INFO L93 Difference]: Finished difference Result 188 states and 233 transitions. [2023-11-23 07:31:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 07:31:50,246 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 2.0) internal successors, (84), 44 states have internal predecessors, (84), 7 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 68 [2023-11-23 07:31:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:31:50,247 INFO L225 Difference]: With dead ends: 188 [2023-11-23 07:31:50,247 INFO L226 Difference]: Without dead ends: 124 [2023-11-23 07:31:50,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=553, Invalid=5453, Unknown=0, NotChecked=0, Total=6006 [2023-11-23 07:31:50,249 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 103 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-23 07:31:50,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 640 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-23 07:31:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-23 07:31:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2023-11-23 07:31:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 80 states have (on average 1.25) internal successors, (100), 84 states have internal predecessors, (100), 19 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2023-11-23 07:31:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 141 transitions. [2023-11-23 07:31:50,264 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 141 transitions. Word has length 68 [2023-11-23 07:31:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:31:50,264 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 141 transitions. [2023-11-23 07:31:50,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 2.0) internal successors, (84), 44 states have internal predecessors, (84), 7 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-23 07:31:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 141 transitions. [2023-11-23 07:31:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 07:31:50,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:31:50,265 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:31:50,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 07:31:50,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 07:31:50,486 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:31:50,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:31:50,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1063013248, now seen corresponding path program 7 times [2023-11-23 07:31:50,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:31:50,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855711973] [2023-11-23 07:31:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:31:50,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:31:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:50,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:31:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:50,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:31:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:50,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:31:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:50,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:31:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:50,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:31:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:50,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:31:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:51,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-23 07:31:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 07:31:51,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:31:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855711973] [2023-11-23 07:31:51,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855711973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:31:51,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386383821] [2023-11-23 07:31:51,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 07:31:51,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:31:51,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:31:51,150 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) [2023-11-23 07:31:51,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 07:31:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:31:51,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-23 07:31:51,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:31:51,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:31:51,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:31:51,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:51,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:31:51,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:51,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 07:31:51,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:51,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-23 07:31:51,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:51,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-23 07:31:51,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:51,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-23 07:31:51,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:51,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-23 07:31:52,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:52,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-11-23 07:31:52,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:52,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-11-23 07:31:52,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:52,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-11-23 07:31:52,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:31:52,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-11-23 07:31:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:31:53,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:32:00,492 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 163 treesize of output 159 [2023-11-23 07:32:00,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:00,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 227 treesize of output 221 [2023-11-23 07:32:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:32:00,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386383821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:32:00,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:32:00,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 23] total 59 [2023-11-23 07:32:00,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403344417] [2023-11-23 07:32:00,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:32:00,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-23 07:32:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:32:00,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-23 07:32:00,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=3021, Unknown=0, NotChecked=0, Total=3422 [2023-11-23 07:32:00,620 INFO L87 Difference]: Start difference. First operand 113 states and 141 transitions. Second operand has 59 states, 58 states have (on average 1.603448275862069) internal successors, (93), 57 states have internal predecessors, (93), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:32:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:32:05,613 INFO L93 Difference]: Finished difference Result 182 states and 227 transitions. [2023-11-23 07:32:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-23 07:32:05,613 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.603448275862069) internal successors, (93), 57 states have internal predecessors, (93), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2023-11-23 07:32:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:32:05,614 INFO L225 Difference]: With dead ends: 182 [2023-11-23 07:32:05,614 INFO L226 Difference]: Without dead ends: 108 [2023-11-23 07:32:05,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=590, Invalid=4812, Unknown=0, NotChecked=0, Total=5402 [2023-11-23 07:32:05,616 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:32:05,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 479 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-23 07:32:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-23 07:32:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-23 07:32:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:32:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2023-11-23 07:32:05,658 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 68 [2023-11-23 07:32:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:32:05,658 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2023-11-23 07:32:05,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.603448275862069) internal successors, (93), 57 states have internal predecessors, (93), 4 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:32:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2023-11-23 07:32:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 07:32:05,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:32:05,659 INFO L195 NwaCegarLoop]: trace histogram [13, 7, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:32:05,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 07:32:05,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 07:32:05,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:32:05,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:32:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash -212555147, now seen corresponding path program 8 times [2023-11-23 07:32:05,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:32:05,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841775672] [2023-11-23 07:32:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:32:05,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:32:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:06,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:32:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:06,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:32:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:32:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:06,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:32:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:06,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:32:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:06,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:32:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:06,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-23 07:32:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-23 07:32:06,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:32:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841775672] [2023-11-23 07:32:06,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841775672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:32:06,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425540008] [2023-11-23 07:32:06,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:32:06,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:32:06,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:32:06,621 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) [2023-11-23 07:32:06,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 07:32:07,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:32:07,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:32:07,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 111 conjunts are in the unsatisfiable core [2023-11-23 07:32:07,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:32:07,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:32:07,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:32:07,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:32:07,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 07:32:07,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-23 07:32:07,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-23 07:32:07,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-23 07:32:07,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-23 07:32:07,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-11-23 07:32:07,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-11-23 07:32:07,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-11-23 07:32:07,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-11-23 07:32:07,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:07,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2023-11-23 07:32:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:32:10,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:32:17,437 WARN L293 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 149 DAG size of output: 147 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-23 07:32:19,211 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 88 treesize of output 86 [2023-11-23 07:32:19,214 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 150 treesize of output 146 [2023-11-23 07:32:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 78 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:32:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425540008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:32:19,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:32:19,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27, 29] total 69 [2023-11-23 07:32:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797527923] [2023-11-23 07:32:19,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:32:19,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-23 07:32:19,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:32:19,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-23 07:32:19,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2023-11-23 07:32:19,357 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 69 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 65 states have internal predecessors, (110), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:32:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:32:27,750 INFO L93 Difference]: Finished difference Result 194 states and 234 transitions. [2023-11-23 07:32:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-23 07:32:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 65 states have internal predecessors, (110), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 75 [2023-11-23 07:32:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:32:27,753 INFO L225 Difference]: With dead ends: 194 [2023-11-23 07:32:27,753 INFO L226 Difference]: Without dead ends: 128 [2023-11-23 07:32:27,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=920, Invalid=9586, Unknown=0, NotChecked=0, Total=10506 [2023-11-23 07:32:27,758 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 180 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 3619 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 3672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:32:27,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 610 Invalid, 3672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3619 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-23 07:32:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-23 07:32:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2023-11-23 07:32:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 83 states have internal predecessors, (98), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:32:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2023-11-23 07:32:27,787 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 75 [2023-11-23 07:32:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:32:27,788 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2023-11-23 07:32:27,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 65 states have internal predecessors, (110), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:32:27,790 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2023-11-23 07:32:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 07:32:27,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:32:27,791 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 4, 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, 1, 1, 1] [2023-11-23 07:32:27,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-23 07:32:28,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 07:32:28,005 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:32:28,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:32:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 585079653, now seen corresponding path program 2 times [2023-11-23 07:32:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:32:28,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788437125] [2023-11-23 07:32:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:32:28,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:32:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:30,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:32:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:30,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:32:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:30,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:32:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:30,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:32:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:30,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:32:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:30,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:32:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:31,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-23 07:32:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-23 07:32:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 07:32:31,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:32:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788437125] [2023-11-23 07:32:31,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788437125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:32:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202738373] [2023-11-23 07:32:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 07:32:31,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:32:31,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:32:31,091 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) [2023-11-23 07:32:31,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 07:32:31,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 07:32:31,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:32:31,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 07:32:31,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:32:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-23 07:32:31,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:32:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-23 07:32:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202738373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:32:32,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:32:32,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 8] total 42 [2023-11-23 07:32:32,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779421896] [2023-11-23 07:32:32,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:32:32,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-23 07:32:32,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:32:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-23 07:32:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1588, Unknown=0, NotChecked=0, Total=1722 [2023-11-23 07:32:32,197 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 42 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 40 states have internal predecessors, (93), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 07:32:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:32:34,328 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions. [2023-11-23 07:32:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 07:32:34,328 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 40 states have internal predecessors, (93), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 79 [2023-11-23 07:32:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:32:34,329 INFO L225 Difference]: With dead ends: 195 [2023-11-23 07:32:34,330 INFO L226 Difference]: Without dead ends: 123 [2023-11-23 07:32:34,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=380, Invalid=4590, Unknown=0, NotChecked=0, Total=4970 [2023-11-23 07:32:34,332 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 103 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:32:34,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 710 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 07:32:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-23 07:32:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2023-11-23 07:32:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 89 states have internal predecessors, (103), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:32:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2023-11-23 07:32:34,362 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 79 [2023-11-23 07:32:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:32:34,362 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2023-11-23 07:32:34,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 40 states have internal predecessors, (93), 5 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 07:32:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2023-11-23 07:32:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 07:32:34,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:32:34,363 INFO L195 NwaCegarLoop]: trace histogram [15, 8, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:32:34,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 07:32:34,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 07:32:34,577 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:32:34,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:32:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash -418072830, now seen corresponding path program 9 times [2023-11-23 07:32:34,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:32:34,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923672391] [2023-11-23 07:32:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:32:34,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:32:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:34,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:32:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:34,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:32:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:34,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:32:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:34,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:32:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:32:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:34,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:32:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:35,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-23 07:32:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:32:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-23 07:32:35,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:32:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923672391] [2023-11-23 07:32:35,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923672391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:32:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756377878] [2023-11-23 07:32:35,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 07:32:35,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:32:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:32:35,457 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) [2023-11-23 07:32:35,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 07:32:52,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-23 07:32:52,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:32:52,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 113 conjunts are in the unsatisfiable core [2023-11-23 07:32:52,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:32:52,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:32:52,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:32:52,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:32:52,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 07:32:52,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-23 07:32:52,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-23 07:32:52,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-23 07:32:52,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-23 07:32:52,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-11-23 07:32:52,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-11-23 07:32:52,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-11-23 07:32:52,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-11-23 07:32:52,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:52,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2023-11-23 07:32:53,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:53,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2023-11-23 07:32:53,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:32:53,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2023-11-23 07:32:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:32:55,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:33:08,422 WARN L293 SmtUtils]: Spent 11.03s on a formula simplification. DAG size of input: 171 DAG size of output: 169 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-23 07:33:11,086 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 100 treesize of output 98 [2023-11-23 07:33:11,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 168 [2023-11-23 07:33:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 105 proven. 71 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:33:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756377878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:33:11,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:33:11,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30, 32] total 77 [2023-11-23 07:33:11,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156853741] [2023-11-23 07:33:11,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:33:11,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-23 07:33:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:33:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-23 07:33:11,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=5337, Unknown=0, NotChecked=0, Total=5852 [2023-11-23 07:33:11,256 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 77 states, 75 states have (on average 1.6) internal successors, (120), 73 states have internal predecessors, (120), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:33:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:33:19,890 INFO L93 Difference]: Finished difference Result 199 states and 237 transitions. [2023-11-23 07:33:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-23 07:33:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 1.6) internal successors, (120), 73 states have internal predecessors, (120), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 79 [2023-11-23 07:33:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:33:19,891 INFO L225 Difference]: With dead ends: 199 [2023-11-23 07:33:19,891 INFO L226 Difference]: Without dead ends: 126 [2023-11-23 07:33:19,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=995, Invalid=11215, Unknown=0, NotChecked=0, Total=12210 [2023-11-23 07:33:19,893 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 110 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 4328 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 4364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-23 07:33:19,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 825 Invalid, 4364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4328 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-23 07:33:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-23 07:33:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2023-11-23 07:33:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 90 states have internal predecessors, (103), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:33:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2023-11-23 07:33:19,921 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 79 [2023-11-23 07:33:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:33:19,922 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2023-11-23 07:33:19,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 1.6) internal successors, (120), 73 states have internal predecessors, (120), 5 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:33:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2023-11-23 07:33:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 07:33:19,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:33:19,923 INFO L195 NwaCegarLoop]: trace histogram [16, 9, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:33:19,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-23 07:33:20,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 07:33:20,137 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:33:20,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:33:20,137 INFO L85 PathProgramCache]: Analyzing trace with hash -846561983, now seen corresponding path program 10 times [2023-11-23 07:33:20,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:33:20,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218975954] [2023-11-23 07:33:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:33:20,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:33:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:33:22,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:33:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:33:22,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:33:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:33:22,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:33:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:33:22,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:33:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:33:22,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:33:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:33:22,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:33:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:33:22,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-23 07:33:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:33:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 16 proven. 192 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:33:23,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:33:23,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218975954] [2023-11-23 07:33:23,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218975954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:33:23,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031455051] [2023-11-23 07:33:23,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 07:33:23,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:33:23,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:33:23,312 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) [2023-11-23 07:33:23,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 07:33:24,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 07:33:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:33:24,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-23 07:33:24,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:33:24,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:33:24,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:33:24,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:33:24,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 07:33:24,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-23 07:33:24,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-23 07:33:24,654 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-23 07:33:24,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-23 07:33:24,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-11-23 07:33:24,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-11-23 07:33:24,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:24,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-11-23 07:33:25,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:25,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-11-23 07:33:25,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:25,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2023-11-23 07:33:25,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:25,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2023-11-23 07:33:25,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:25,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2023-11-23 07:33:25,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:25,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 147 treesize of output 188 [2023-11-23 07:33:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:33:29,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:33:48,725 WARN L293 SmtUtils]: Spent 17.27s on a formula simplification. DAG size of input: 182 DAG size of output: 180 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-23 07:33:52,115 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 213 treesize of output 209 [2023-11-23 07:33:52,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:33:52,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 273 treesize of output 265 [2023-11-23 07:33:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:33:52,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031455051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 07:33:52,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 07:33:52,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 32] total 92 [2023-11-23 07:33:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678419562] [2023-11-23 07:33:52,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 07:33:52,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-11-23 07:33:52,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:33:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-11-23 07:33:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=797, Invalid=7575, Unknown=0, NotChecked=0, Total=8372 [2023-11-23 07:33:52,319 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 92 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 90 states have internal predecessors, (140), 5 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:34:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:13,513 INFO L93 Difference]: Finished difference Result 208 states and 256 transitions. [2023-11-23 07:34:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-23 07:34:13,523 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 90 states have internal predecessors, (140), 5 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 82 [2023-11-23 07:34:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:13,524 INFO L225 Difference]: With dead ends: 208 [2023-11-23 07:34:13,524 INFO L226 Difference]: Without dead ends: 169 [2023-11-23 07:34:13,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=1201, Invalid=15055, Unknown=0, NotChecked=0, Total=16256 [2023-11-23 07:34:13,526 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 315 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 6642 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 6709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 6642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:13,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 678 Invalid, 6709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 6642 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2023-11-23 07:34:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-23 07:34:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2023-11-23 07:34:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 105 states have (on average 1.276190476190476) internal successors, (134), 107 states have internal predecessors, (134), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-11-23 07:34:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 170 transitions. [2023-11-23 07:34:13,571 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 170 transitions. Word has length 82 [2023-11-23 07:34:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:13,571 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 170 transitions. [2023-11-23 07:34:13,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 90 states have internal predecessors, (140), 5 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 07:34:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 170 transitions. [2023-11-23 07:34:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 07:34:13,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:13,572 INFO L195 NwaCegarLoop]: trace histogram [16, 6, 5, 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, 1, 1] [2023-11-23 07:34:13,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-23 07:34:13,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:13,783 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:13,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:13,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2140717537, now seen corresponding path program 1 times [2023-11-23 07:34:13,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:13,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033397758] [2023-11-23 07:34:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:13,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:13,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:13,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:34:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:13,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:34:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:13,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:34:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:34:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:14,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:34:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-23 07:34:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-23 07:34:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-23 07:34:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:14,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033397758] [2023-11-23 07:34:14,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033397758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 07:34:14,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 07:34:14,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 07:34:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006119625] [2023-11-23 07:34:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 07:34:14,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 07:34:14,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 07:34:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 07:34:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 07:34:14,085 INFO L87 Difference]: Start difference. First operand 135 states and 170 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 07:34:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 07:34:14,349 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2023-11-23 07:34:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 07:34:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2023-11-23 07:34:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 07:34:14,350 INFO L225 Difference]: With dead ends: 172 [2023-11-23 07:34:14,350 INFO L226 Difference]: Without dead ends: 135 [2023-11-23 07:34:14,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 07:34:14,351 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 37 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 07:34:14,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 146 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 07:34:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-23 07:34:14,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-23 07:34:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 105 states have (on average 1.2666666666666666) internal successors, (133), 107 states have internal predecessors, (133), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-23 07:34:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2023-11-23 07:34:14,391 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 83 [2023-11-23 07:34:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 07:34:14,391 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2023-11-23 07:34:14,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 07:34:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2023-11-23 07:34:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 07:34:14,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 07:34:14,392 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 07:34:14,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 07:34:14,393 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 07:34:14,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 07:34:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash 880672910, now seen corresponding path program 11 times [2023-11-23 07:34:14,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 07:34:14,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58810587] [2023-11-23 07:34:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 07:34:14,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 07:34:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:15,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-23 07:34:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:15,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-23 07:34:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:15,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-23 07:34:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:15,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-23 07:34:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:15,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-23 07:34:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:15,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-23 07:34:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:16,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-23 07:34:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 07:34:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 11 proven. 215 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:34:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 07:34:17,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58810587] [2023-11-23 07:34:17,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58810587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 07:34:17,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635514381] [2023-11-23 07:34:17,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 07:34:17,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 07:34:17,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 07:34:17,469 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) [2023-11-23 07:34:17,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 07:34:22,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-23 07:34:22,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 07:34:22,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 127 conjunts are in the unsatisfiable core [2023-11-23 07:34:22,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 07:34:22,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 07:34:22,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 07:34:22,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:22,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-23 07:34:22,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:22,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-23 07:34:22,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:22,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-23 07:34:22,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:22,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-23 07:34:22,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:22,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-23 07:34:22,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:22,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-23 07:34:22,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:22,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-11-23 07:34:22,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:22,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-11-23 07:34:23,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:23,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-11-23 07:34:23,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:23,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-11-23 07:34:23,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:23,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2023-11-23 07:34:23,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:23,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2023-11-23 07:34:23,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:23,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2023-11-23 07:34:23,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 07:34:23,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 228 treesize of output 185 [2023-11-23 07:34:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 07:34:37,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 07:34:55,299 WARN L293 SmtUtils]: Spent 15.06s on a formula simplification. DAG size of input: 192 DAG size of output: 188 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) Killed by 15