./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_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 14ecb1bdeb89e6f16cc91bd9d320557c2f2576024bfb946541efab4252b9f995 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 07:16:35,366 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 07:16:35,413 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-03-17 07:16:35,418 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 07:16:35,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 07:16:35,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 07:16:35,440 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 07:16:35,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 07:16:35,441 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 07:16:35,441 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 07:16:35,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 07:16:35,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 07:16:35,442 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 07:16:35,442 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 07:16:35,442 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 07:16:35,443 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 07:16:35,443 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 07:16:35,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 07:16:35,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 07:16:35,444 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 14ecb1bdeb89e6f16cc91bd9d320557c2f2576024bfb946541efab4252b9f995 [2025-03-17 07:16:35,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 07:16:35,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 07:16:35,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 07:16:35,696 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 07:16:35,697 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 07:16:35,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2025-03-17 07:16:36,859 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4886c2448/c0ffa4222319469a95ce9415ca27bc57/FLAG3a8e67169 [2025-03-17 07:16:37,340 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 07:16:37,343 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2025-03-17 07:16:37,375 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4886c2448/c0ffa4222319469a95ce9415ca27bc57/FLAG3a8e67169 [2025-03-17 07:16:37,391 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4886c2448/c0ffa4222319469a95ce9415ca27bc57 [2025-03-17 07:16:37,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 07:16:37,395 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 07:16:37,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 07:16:37,396 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 07:16:37,399 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 07:16:37,400 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c27dee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37, skipping insertion in model container [2025-03-17 07:16:37,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,463 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 07:16:37,653 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2025-03-17 07:16:37,659 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2025-03-17 07:16:38,130 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,131 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,131 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,132 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,132 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,150 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,150 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,152 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,152 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,154 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,154 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,154 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,155 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,457 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[150268,150281] [2025-03-17 07:16:38,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 07:16:38,477 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 07:16:38,488 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2025-03-17 07:16:38,490 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2025-03-17 07:16:38,542 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,542 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,542 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,543 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,543 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,549 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,551 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,552 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,553 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,554 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,555 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,555 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,555 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:38,632 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[150268,150281] [2025-03-17 07:16:38,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 07:16:38,764 INFO L204 MainTranslator]: Completed translation [2025-03-17 07:16:38,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38 WrapperNode [2025-03-17 07:16:38,765 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 07:16:38,766 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 07:16:38,766 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 07:16:38,766 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 07:16:38,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,828 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,851 INFO L138 Inliner]: procedures = 668, calls = 1032, calls flagged for inlining = 49, calls inlined = 3, statements flattened = 27 [2025-03-17 07:16:38,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 07:16:38,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 07:16:38,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 07:16:38,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 07:16:38,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,863 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,879 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-03-17 07:16:38,879 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,880 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,894 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,895 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,897 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,897 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 07:16:38,900 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 07:16:38,900 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 07:16:38,900 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 07:16:38,901 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (1/1) ... [2025-03-17 07:16:38,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 07:16:38,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:38,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 07:16:38,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 07:16:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2025-03-17 07:16:38,954 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2025-03-17 07:16:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2025-03-17 07:16:38,954 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-17 07:16:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 07:16:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2025-03-17 07:16:38,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2025-03-17 07:16:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2025-03-17 07:16:38,956 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2025-03-17 07:16:38,956 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2025-03-17 07:16:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-17 07:16:38,957 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-17 07:16:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-17 07:16:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-17 07:16:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-17 07:16:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-17 07:16:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 07:16:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 07:16:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 07:16:39,127 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 07:16:39,129 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 07:16:39,287 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2025-03-17 07:16:39,287 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 07:16:39,293 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 07:16:39,293 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 07:16:39,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:16:39 BoogieIcfgContainer [2025-03-17 07:16:39,293 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 07:16:39,294 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 07:16:39,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 07:16:39,298 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 07:16:39,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:16:37" (1/3) ... [2025-03-17 07:16:39,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40995f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:16:39, skipping insertion in model container [2025-03-17 07:16:39,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:38" (2/3) ... [2025-03-17 07:16:39,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40995f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:16:39, skipping insertion in model container [2025-03-17 07:16:39,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:16:39" (3/3) ... [2025-03-17 07:16:39,299 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2025-03-17 07:16:39,309 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 07:16:39,310 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_node_reset_harness.i that has 8 procedures, 44 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-03-17 07:16:39,346 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 07:16:39,357 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@767eccbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 07:16:39,357 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-17 07:16:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-17 07:16:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-17 07:16:39,365 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:39,366 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:39,366 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:39,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:39,369 INFO L85 PathProgramCache]: Analyzing trace with hash -984949872, now seen corresponding path program 1 times [2025-03-17 07:16:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184519504] [2025-03-17 07:16:39,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:39,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 07:16:39,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 07:16:39,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:39,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:39,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:39,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184519504] [2025-03-17 07:16:39,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184519504] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:16:39,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 07:16:39,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 07:16:39,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869173223] [2025-03-17 07:16:39,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:16:39,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 07:16:39,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:39,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 07:16:39,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 07:16:39,613 INFO L87 Difference]: Start difference. First operand has 36 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 07:16:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:39,628 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2025-03-17 07:16:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 07:16:39,630 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-03-17 07:16:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:39,634 INFO L225 Difference]: With dead ends: 66 [2025-03-17 07:16:39,635 INFO L226 Difference]: Without dead ends: 33 [2025-03-17 07:16:39,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 07:16:39,639 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:39,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:16:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-17 07:16:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-17 07:16:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-17 07:16:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2025-03-17 07:16:39,664 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 18 [2025-03-17 07:16:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:39,664 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2025-03-17 07:16:39,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 07:16:39,664 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2025-03-17 07:16:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-17 07:16:39,665 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:39,665 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:39,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 07:16:39,666 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:39,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash -736703110, now seen corresponding path program 1 times [2025-03-17 07:16:39,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:39,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792792721] [2025-03-17 07:16:39,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:39,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:39,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 07:16:39,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 07:16:39,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:39,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:40,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792792721] [2025-03-17 07:16:40,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792792721] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:16:40,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 07:16:40,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 07:16:40,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665905638] [2025-03-17 07:16:40,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:16:40,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 07:16:40,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:40,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 07:16:40,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 07:16:40,051 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-17 07:16:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:40,093 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2025-03-17 07:16:40,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 07:16:40,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2025-03-17 07:16:40,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:40,096 INFO L225 Difference]: With dead ends: 43 [2025-03-17 07:16:40,097 INFO L226 Difference]: Without dead ends: 41 [2025-03-17 07:16:40,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 07:16:40,098 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:40,098 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 166 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:16:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-17 07:16:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-17 07:16:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-17 07:16:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2025-03-17 07:16:40,105 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2025-03-17 07:16:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:40,105 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2025-03-17 07:16:40,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-17 07:16:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2025-03-17 07:16:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-17 07:16:40,109 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:40,109 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:40,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 07:16:40,110 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:40,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1972149933, now seen corresponding path program 1 times [2025-03-17 07:16:40,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:40,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385690728] [2025-03-17 07:16:40,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:40,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:40,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 07:16:40,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 07:16:40,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:40,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:40,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:40,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385690728] [2025-03-17 07:16:40,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385690728] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:16:40,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 07:16:40,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 07:16:40,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805143520] [2025-03-17 07:16:40,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:16:40,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 07:16:40,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:40,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 07:16:40,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 07:16:40,267 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-17 07:16:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:40,287 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2025-03-17 07:16:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 07:16:40,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-17 07:16:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:40,289 INFO L225 Difference]: With dead ends: 70 [2025-03-17 07:16:40,290 INFO L226 Difference]: Without dead ends: 41 [2025-03-17 07:16:40,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 07:16:40,291 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:40,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:16:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-17 07:16:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-03-17 07:16:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-17 07:16:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2025-03-17 07:16:40,297 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 25 [2025-03-17 07:16:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:40,299 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2025-03-17 07:16:40,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-17 07:16:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2025-03-17 07:16:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-17 07:16:40,300 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:40,300 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:40,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 07:16:40,301 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:40,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash -465590105, now seen corresponding path program 1 times [2025-03-17 07:16:40,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:40,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752499250] [2025-03-17 07:16:40,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:40,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:40,317 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 07:16:40,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 07:16:40,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:40,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:40,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:40,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752499250] [2025-03-17 07:16:40,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752499250] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:40,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778052830] [2025-03-17 07:16:40,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:40,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:40,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:40,547 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) [2025-03-17 07:16:40,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 07:16:40,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 07:16:40,684 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 07:16:40,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:40,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:40,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-17 07:16:40,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:40,783 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 [2025-03-17 07:16:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:41,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:41,381 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 [2025-03-17 07:16:41,390 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 [2025-03-17 07:16:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:41,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778052830] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:41,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:41,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 10] total 24 [2025-03-17 07:16:41,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017155835] [2025-03-17 07:16:41,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:41,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 07:16:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:41,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 07:16:41,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2025-03-17 07:16:41,435 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:41,867 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2025-03-17 07:16:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 07:16:41,868 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 26 [2025-03-17 07:16:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:41,869 INFO L225 Difference]: With dead ends: 75 [2025-03-17 07:16:41,869 INFO L226 Difference]: Without dead ends: 46 [2025-03-17 07:16:41,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2025-03-17 07:16:41,870 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:41,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 302 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 07:16:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-17 07:16:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-03-17 07:16:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2025-03-17 07:16:41,882 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 26 [2025-03-17 07:16:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:41,882 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2025-03-17 07:16:41,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2025-03-17 07:16:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-17 07:16:41,883 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:41,883 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-17 07:16:41,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 07:16:42,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:42,084 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:42,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1419119820, now seen corresponding path program 1 times [2025-03-17 07:16:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:42,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323253693] [2025-03-17 07:16:42,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:42,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:42,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 07:16:42,110 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 07:16:42,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:42,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 07:16:42,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:42,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323253693] [2025-03-17 07:16:42,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323253693] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:42,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132757249] [2025-03-17 07:16:42,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:42,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:42,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:42,260 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) [2025-03-17 07:16:42,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 07:16:42,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 07:16:42,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 07:16:42,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:42,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:42,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-17 07:16:42,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:42,398 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 [2025-03-17 07:16:42,421 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 [2025-03-17 07:16:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:42,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:43,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2025-03-17 07:16:43,198 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 27 treesize of output 23 [2025-03-17 07:16:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132757249] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:43,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:43,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 13] total 31 [2025-03-17 07:16:43,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652088321] [2025-03-17 07:16:43,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:43,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 07:16:43,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:43,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 07:16:43,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2025-03-17 07:16:43,247 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:43,750 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2025-03-17 07:16:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 07:16:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 29 [2025-03-17 07:16:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:43,751 INFO L225 Difference]: With dead ends: 84 [2025-03-17 07:16:43,751 INFO L226 Difference]: Without dead ends: 51 [2025-03-17 07:16:43,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2025-03-17 07:16:43,752 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:43,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 405 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 07:16:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-17 07:16:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2025-03-17 07:16:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2025-03-17 07:16:43,766 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 29 [2025-03-17 07:16:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:43,767 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2025-03-17 07:16:43,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2025-03-17 07:16:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-17 07:16:43,768 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:43,768 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-17 07:16:43,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 07:16:43,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:43,969 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:43,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash -246667675, now seen corresponding path program 2 times [2025-03-17 07:16:43,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:43,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466746317] [2025-03-17 07:16:43,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 07:16:43,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:43,984 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 07:16:44,001 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 07:16:44,002 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 07:16:44,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 07:16:44,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:44,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466746317] [2025-03-17 07:16:44,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466746317] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:44,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744617725] [2025-03-17 07:16:44,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 07:16:44,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:44,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:44,155 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) [2025-03-17 07:16:44,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 07:16:44,214 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 07:16:44,252 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 07:16:44,253 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 07:16:44,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:44,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-17 07:16:44,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:44,303 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 [2025-03-17 07:16:44,323 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 [2025-03-17 07:16:44,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:44,348 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 [2025-03-17 07:16:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 07:16:44,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:44,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744617725] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:44,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 07:16:44,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 16 [2025-03-17 07:16:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817887083] [2025-03-17 07:16:44,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:44,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 07:16:44,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:44,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 07:16:44,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2025-03-17 07:16:44,561 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-17 07:16:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:44,652 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2025-03-17 07:16:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 07:16:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2025-03-17 07:16:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:44,653 INFO L225 Difference]: With dead ends: 85 [2025-03-17 07:16:44,653 INFO L226 Difference]: Without dead ends: 50 [2025-03-17 07:16:44,654 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2025-03-17 07:16:44,654 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:44,654 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 209 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 07:16:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-17 07:16:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-17 07:16:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 36 states have internal predecessors, (41), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2025-03-17 07:16:44,660 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 32 [2025-03-17 07:16:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:44,661 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2025-03-17 07:16:44,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-17 07:16:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2025-03-17 07:16:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-17 07:16:44,661 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:44,661 INFO L218 NwaCegarLoop]: trace histogram [4, 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] [2025-03-17 07:16:44,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 07:16:44,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:44,866 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:44,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2142424875, now seen corresponding path program 3 times [2025-03-17 07:16:44,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:44,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464520522] [2025-03-17 07:16:44,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 07:16:44,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:44,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 3 equivalence classes. [2025-03-17 07:16:44,910 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 07:16:44,910 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 07:16:44,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 07:16:45,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464520522] [2025-03-17 07:16:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464520522] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697160986] [2025-03-17 07:16:45,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 07:16:45,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:45,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:45,076 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) [2025-03-17 07:16:45,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 07:16:45,132 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 3 equivalence classes. [2025-03-17 07:16:45,181 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 07:16:45,181 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 07:16:45,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:45,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 71 conjuncts are in the unsatisfiable core [2025-03-17 07:16:45,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:45,236 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 [2025-03-17 07:16:45,252 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 [2025-03-17 07:16:45,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:45,273 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 [2025-03-17 07:16:45,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:45,302 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 [2025-03-17 07:16:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 07:16:45,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:46,173 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 [2025-03-17 07:16:46,175 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 [2025-03-17 07:16:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:46,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697160986] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:46,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:46,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 17] total 33 [2025-03-17 07:16:46,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684651803] [2025-03-17 07:16:46,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:46,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-17 07:16:46,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:46,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-17 07:16:46,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 07:16:46,219 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 33 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-17 07:16:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:47,356 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2025-03-17 07:16:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-17 07:16:47,357 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 33 [2025-03-17 07:16:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:47,358 INFO L225 Difference]: With dead ends: 99 [2025-03-17 07:16:47,361 INFO L226 Difference]: Without dead ends: 64 [2025-03-17 07:16:47,362 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2025-03-17 07:16:47,363 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:47,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 451 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-17 07:16:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-17 07:16:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2025-03-17 07:16:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 39 states have internal predecessors, (46), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2025-03-17 07:16:47,378 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 33 [2025-03-17 07:16:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:47,378 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2025-03-17 07:16:47,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-17 07:16:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2025-03-17 07:16:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-17 07:16:47,379 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:47,379 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 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] [2025-03-17 07:16:47,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 07:16:47,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:47,579 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:47,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash 125173764, now seen corresponding path program 4 times [2025-03-17 07:16:47,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:47,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024867666] [2025-03-17 07:16:47,580 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 07:16:47,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:47,591 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-17 07:16:47,611 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 07:16:47,611 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 07:16:47,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 07:16:47,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:47,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024867666] [2025-03-17 07:16:47,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024867666] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:47,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351159062] [2025-03-17 07:16:47,817 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 07:16:47,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:47,819 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) [2025-03-17 07:16:47,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 07:16:47,884 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-17 07:16:47,913 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 07:16:47,913 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 07:16:47,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:47,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-17 07:16:47,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:47,974 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 [2025-03-17 07:16:47,991 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 [2025-03-17 07:16:48,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:48,019 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 [2025-03-17 07:16:48,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:48,047 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 [2025-03-17 07:16:48,100 INFO L349 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2025-03-17 07:16:48,101 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 10 case distinctions, treesize of input 48 treesize of output 56 [2025-03-17 07:16:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 07:16:48,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:49,171 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 34 treesize of output 32 [2025-03-17 07:16:49,363 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 34 treesize of output 32 [2025-03-17 07:16:49,365 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 45 treesize of output 41 [2025-03-17 07:16:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 07:16:49,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351159062] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:49,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:49,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 20, 16] total 40 [2025-03-17 07:16:49,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275957296] [2025-03-17 07:16:49,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:49,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-17 07:16:49,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:49,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-17 07:16:49,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2025-03-17 07:16:49,421 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:50,368 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2025-03-17 07:16:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 07:16:50,369 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 36 [2025-03-17 07:16:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:50,371 INFO L225 Difference]: With dead ends: 99 [2025-03-17 07:16:50,371 INFO L226 Difference]: Without dead ends: 62 [2025-03-17 07:16:50,372 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2025-03-17 07:16:50,372 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:50,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 540 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-17 07:16:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-17 07:16:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2025-03-17 07:16:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 42 states have internal predecessors, (51), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2025-03-17 07:16:50,390 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2025-03-17 07:16:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:50,390 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2025-03-17 07:16:50,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2025-03-17 07:16:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-17 07:16:50,391 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:50,391 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:50,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 07:16:50,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:50,591 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:50,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:50,592 INFO L85 PathProgramCache]: Analyzing trace with hash -109543063, now seen corresponding path program 5 times [2025-03-17 07:16:50,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:50,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505025417] [2025-03-17 07:16:50,592 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 07:16:50,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:50,608 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 5 equivalence classes. [2025-03-17 07:16:50,677 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 07:16:50,677 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-17 07:16:50,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-17 07:16:50,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:50,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505025417] [2025-03-17 07:16:50,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505025417] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:50,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268494663] [2025-03-17 07:16:50,863 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 07:16:50,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:50,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:50,865 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) [2025-03-17 07:16:50,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 07:16:50,933 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 5 equivalence classes. [2025-03-17 07:16:51,086 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 07:16:51,086 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-17 07:16:51,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:51,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-17 07:16:51,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:51,155 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 [2025-03-17 07:16:51,174 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 [2025-03-17 07:16:51,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:51,199 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 [2025-03-17 07:16:51,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:51,228 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 [2025-03-17 07:16:51,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:51,263 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 [2025-03-17 07:16:51,340 INFO L349 Elim1Store]: treesize reduction 88, result has 33.3 percent of original size [2025-03-17 07:16:51,340 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 15 case distinctions, treesize of input 57 treesize of output 68 [2025-03-17 07:16:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:53,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:54,349 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 39 treesize of output 37 [2025-03-17 07:16:54,794 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 45 treesize of output 43 [2025-03-17 07:16:54,797 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 63 treesize of output 59 [2025-03-17 07:16:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:54,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268494663] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:54,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:54,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 23, 20] total 48 [2025-03-17 07:16:54,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571168353] [2025-03-17 07:16:54,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:54,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-17 07:16:54,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:54,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-17 07:16:54,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2076, Unknown=1, NotChecked=0, Total=2256 [2025-03-17 07:16:54,872 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 48 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:17:00,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:17:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:00,914 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2025-03-17 07:17:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-17 07:17:00,914 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 39 [2025-03-17 07:17:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:00,915 INFO L225 Difference]: With dead ends: 115 [2025-03-17 07:17:00,915 INFO L226 Difference]: Without dead ends: 76 [2025-03-17 07:17:00,916 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=296, Invalid=3607, Unknown=3, NotChecked=0, Total=3906 [2025-03-17 07:17:00,916 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:00,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 637 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1192 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2025-03-17 07:17:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-17 07:17:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2025-03-17 07:17:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 45 states have internal predecessors, (56), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:17:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2025-03-17 07:17:00,927 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 39 [2025-03-17 07:17:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:00,927 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2025-03-17 07:17:00,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 states have internal predecessors, (76), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:17:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2025-03-17 07:17:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-17 07:17:00,928 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:00,929 INFO L218 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:00,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 07:17:01,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:01,129 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:01,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash -271557311, now seen corresponding path program 1 times [2025-03-17 07:17:01,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:01,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640375228] [2025-03-17 07:17:01,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:01,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:01,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-17 07:17:01,161 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 07:17:01,161 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:01,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 07:17:01,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:01,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640375228] [2025-03-17 07:17:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640375228] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:17:01,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 07:17:01,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 07:17:01,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283126932] [2025-03-17 07:17:01,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:17:01,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 07:17:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:01,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 07:17:01,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 07:17:01,296 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-17 07:17:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:01,327 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2025-03-17 07:17:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 07:17:01,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2025-03-17 07:17:01,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:01,329 INFO L225 Difference]: With dead ends: 68 [2025-03-17 07:17:01,330 INFO L226 Difference]: Without dead ends: 61 [2025-03-17 07:17:01,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 07:17:01,330 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:01,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 180 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:17:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-17 07:17:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-03-17 07:17:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 47 states have internal predecessors, (57), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-17 07:17:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2025-03-17 07:17:01,349 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 44 [2025-03-17 07:17:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:01,350 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2025-03-17 07:17:01,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-17 07:17:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2025-03-17 07:17:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-17 07:17:01,351 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:01,351 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:01,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 07:17:01,351 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:01,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash 829003586, now seen corresponding path program 6 times [2025-03-17 07:17:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:01,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819496713] [2025-03-17 07:17:01,353 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 07:17:01,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:01,366 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 42 statements into 6 equivalence classes. [2025-03-17 07:17:01,420 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 07:17:01,420 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-17 07:17:01,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 07:17:01,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:01,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819496713] [2025-03-17 07:17:01,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819496713] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:01,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929511401] [2025-03-17 07:17:01,634 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 07:17:01,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:01,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:01,636 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) [2025-03-17 07:17:01,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 07:17:01,709 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 42 statements into 6 equivalence classes. [2025-03-17 07:17:02,034 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 07:17:02,035 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-17 07:17:02,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:02,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-03-17 07:17:02,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:02,045 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 7 treesize of output 3 [2025-03-17 07:17:02,069 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 [2025-03-17 07:17:02,081 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 [2025-03-17 07:17:02,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:02,099 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 [2025-03-17 07:17:02,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:02,120 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 [2025-03-17 07:17:02,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:02,149 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 [2025-03-17 07:17:02,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:02,181 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 [2025-03-17 07:17:02,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:02,217 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 [2025-03-17 07:17:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 07:17:02,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:17:02,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929511401] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:02,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 07:17:02,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2025-03-17 07:17:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274186054] [2025-03-17 07:17:02,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 07:17:02,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 07:17:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:02,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 07:17:02,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2025-03-17 07:17:02,424 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-17 07:17:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:02,549 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2025-03-17 07:17:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 07:17:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2025-03-17 07:17:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:02,550 INFO L225 Difference]: With dead ends: 105 [2025-03-17 07:17:02,550 INFO L226 Difference]: Without dead ends: 62 [2025-03-17 07:17:02,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2025-03-17 07:17:02,550 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:02,550 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 07:17:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-17 07:17:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2025-03-17 07:17:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 48 states have internal predecessors, (58), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-17 07:17:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2025-03-17 07:17:02,561 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 42 [2025-03-17 07:17:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:02,561 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2025-03-17 07:17:02,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-17 07:17:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2025-03-17 07:17:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-17 07:17:02,562 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:02,562 INFO L218 NwaCegarLoop]: trace histogram [8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:02,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 07:17:02,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:02,763 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:02,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1233092472, now seen corresponding path program 7 times [2025-03-17 07:17:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:02,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362052685] [2025-03-17 07:17:02,763 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 07:17:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:02,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-17 07:17:02,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 07:17:02,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:02,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 07:17:03,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:03,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362052685] [2025-03-17 07:17:03,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362052685] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:03,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037592839] [2025-03-17 07:17:03,054 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 07:17:03,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:03,056 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) [2025-03-17 07:17:03,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 07:17:03,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-17 07:17:03,263 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 07:17:03,263 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:03,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:03,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-17 07:17:03,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:03,405 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 [2025-03-17 07:17:03,438 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 [2025-03-17 07:17:03,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:03,501 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 [2025-03-17 07:17:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 07:17:03,581 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:17:04,428 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 [2025-03-17 07:17:04,431 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 [2025-03-17 07:17:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:17:16,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037592839] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:17:16,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:17:16,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 23] total 47 [2025-03-17 07:17:16,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925521413] [2025-03-17 07:17:16,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:17:16,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-17 07:17:16,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:16,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-17 07:17:16,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1866, Unknown=3, NotChecked=0, Total=2162 [2025-03-17 07:17:16,718 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 47 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 5 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)