./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_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_pop_front_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 0a45241a50bca97d16f2ca30787e76783488e633dbd3fde1131a60622cf8ee85 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 07:17:23,067 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 07:17:23,124 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-03-17 07:17:23,134 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 07:17:23,136 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 07:17:23,158 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 07:17:23,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 07:17:23,160 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 07:17:23,160 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 07:17:23,160 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 07:17:23,161 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 07:17:23,161 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 07:17:23,162 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 07:17:23,162 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 07:17:23,162 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 07:17:23,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 07:17:23,162 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 07:17:23,163 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 07:17:23,163 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 07:17:23,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 07:17:23,164 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 07:17:23,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 07:17:23,164 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 07:17:23,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 07:17:23,165 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 07:17:23,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 07:17:23,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 07:17:23,165 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 07:17:23,165 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 07:17:23,165 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 07:17:23,165 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 -> 0a45241a50bca97d16f2ca30787e76783488e633dbd3fde1131a60622cf8ee85 [2025-03-17 07:17:23,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 07:17:23,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 07:17:23,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 07:17:23,450 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 07:17:23,450 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 07:17:23,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2025-03-17 07:17:24,667 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480e170e3/ca6fb79bbc814edf9c39054a9b613433/FLAG3c3032f47 [2025-03-17 07:17:25,081 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 07:17:25,081 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2025-03-17 07:17:25,116 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480e170e3/ca6fb79bbc814edf9c39054a9b613433/FLAG3c3032f47 [2025-03-17 07:17:25,215 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480e170e3/ca6fb79bbc814edf9c39054a9b613433 [2025-03-17 07:17:25,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 07:17:25,217 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 07:17:25,218 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 07:17:25,218 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 07:17:25,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 07:17:25,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:17:25" (1/1) ... [2025-03-17 07:17:25,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58686f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:25, skipping insertion in model container [2025-03-17 07:17:25,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:17:25" (1/1) ... [2025-03-17 07:17:25,285 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 07:17:25,492 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_pop_front_harness.i[4499,4512] [2025-03-17 07:17:25,499 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_pop_front_harness.i[4559,4572] [2025-03-17 07:17:25,980 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,980 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,981 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,981 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,982 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,990 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,991 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,992 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,992 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,997 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,998 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,998 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:25,999 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,292 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_pop_front_harness.i[150662,150675] [2025-03-17 07:17:26,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 07:17:26,308 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 07:17:26,321 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_pop_front_harness.i[4499,4512] [2025-03-17 07:17:26,321 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_pop_front_harness.i[4559,4572] [2025-03-17 07:17:26,357 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,359 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,359 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,360 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,360 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,368 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,370 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,370 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,371 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,372 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,372 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,372 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,373 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:17:26,445 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_pop_front_harness.i[150662,150675] [2025-03-17 07:17:26,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 07:17:26,561 INFO L204 MainTranslator]: Completed translation [2025-03-17 07:17:26,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26 WrapperNode [2025-03-17 07:17:26,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 07:17:26,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 07:17:26,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 07:17:26,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 07:17:26,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,629 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,659 INFO L138 Inliner]: procedures = 668, calls = 1044, calls flagged for inlining = 53, calls inlined = 8, statements flattened = 219 [2025-03-17 07:17:26,664 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 07:17:26,665 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 07:17:26,665 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 07:17:26,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 07:17:26,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,675 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,699 INFO L175 MemorySlicer]: Split 43 memory accesses to 3 slices as follows [2, 5, 36]. 84 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 9 writes are split as follows [0, 0, 9]. [2025-03-17 07:17:26,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,715 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,719 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,722 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,731 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 07:17:26,736 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 07:17:26,736 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 07:17:26,736 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 07:17:26,737 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (1/1) ... [2025-03-17 07:17:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 07:17:26,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:26,767 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 07:17:26,772 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 07:17:26,786 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2025-03-17 07:17:26,787 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2025-03-17 07:17:26,787 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-17 07:17:26,788 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2025-03-17 07:17:26,788 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2025-03-17 07:17:26,788 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 07:17:26,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 07:17:26,986 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 07:17:26,987 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 07:17:27,037 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L4729: havoc #t~mem317.base, #t~mem317.offset;havoc #t~short318;havoc #t~mem319.base, #t~mem319.offset;havoc #t~mem320.base, #t~mem320.offset;havoc #t~short321; [2025-03-17 07:17:27,070 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L266: havoc #t~nondet9; [2025-03-17 07:17:27,124 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L4718: havoc #t~mem312.base, #t~mem312.offset;havoc #t~short313;havoc #t~mem314.base, #t~mem314.offset;havoc #t~mem315.base, #t~mem315.offset;havoc #t~short316; [2025-03-17 07:17:27,337 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L4700: havoc #t~ret311#1; [2025-03-17 07:17:27,345 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L4685: havoc #t~mem302.base, #t~mem302.offset; [2025-03-17 07:17:27,416 INFO L? ?]: Removed 95 outVars from TransFormulas that were not future-live. [2025-03-17 07:17:27,416 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 07:17:27,430 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 07:17:27,430 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 07:17:27,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:17:27 BoogieIcfgContainer [2025-03-17 07:17:27,431 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 07:17:27,432 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 07:17:27,432 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 07:17:27,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 07:17:27,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:17:25" (1/3) ... [2025-03-17 07:17:27,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39827f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:17:27, skipping insertion in model container [2025-03-17 07:17:27,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:17:26" (2/3) ... [2025-03-17 07:17:27,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39827f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:17:27, skipping insertion in model container [2025-03-17 07:17:27,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:17:27" (3/3) ... [2025-03-17 07:17:27,441 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2025-03-17 07:17:27,452 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 07:17:27,453 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_pop_front_harness.i that has 13 procedures, 135 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-03-17 07:17:27,498 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 07:17:27,507 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;@1b68582c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 07:17:27,508 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-17 07:17:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2025-03-17 07:17:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-03-17 07:17:27,520 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:27,521 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:27,521 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:27,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash -907516337, now seen corresponding path program 1 times [2025-03-17 07:17:27,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:27,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476715758] [2025-03-17 07:17:27,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:27,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:27,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 116 statements into 1 equivalence classes. [2025-03-17 07:17:27,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 116 of 116 statements. [2025-03-17 07:17:27,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:27,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2025-03-17 07:17:27,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476715758] [2025-03-17 07:17:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476715758] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352451884] [2025-03-17 07:17:27,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:27,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:27,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:27,868 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 07:17:27,870 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 07:17:28,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 116 statements into 1 equivalence classes. [2025-03-17 07:17:28,089 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 116 of 116 statements. [2025-03-17 07:17:28,089 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:28,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:28,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-17 07:17:28,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2025-03-17 07:17:28,127 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 07:17:28,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352451884] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:17:28,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 07:17:28,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-17 07:17:28,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409245480] [2025-03-17 07:17:28,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:17:28,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 07:17:28,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:28,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 07:17:28,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 07:17:28,153 INFO L87 Difference]: Start difference. First operand has 127 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2025-03-17 07:17:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:28,184 INFO L93 Difference]: Finished difference Result 247 states and 370 transitions. [2025-03-17 07:17:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 07:17:28,186 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 116 [2025-03-17 07:17:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:28,192 INFO L225 Difference]: With dead ends: 247 [2025-03-17 07:17:28,192 INFO L226 Difference]: Without dead ends: 124 [2025-03-17 07:17:28,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 117 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 07:17:28,197 INFO L435 NwaCegarLoop]: 173 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, 173 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 07:17:28,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:17:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-17 07:17:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2025-03-17 07:17:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 77 states have internal predecessors, (97), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2025-03-17 07:17:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2025-03-17 07:17:28,240 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 116 [2025-03-17 07:17:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:28,241 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2025-03-17 07:17:28,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2025-03-17 07:17:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2025-03-17 07:17:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-03-17 07:17:28,244 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:28,244 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:28,252 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 07:17:28,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-17 07:17:28,447 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:28,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1712317164, now seen corresponding path program 1 times [2025-03-17 07:17:28,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:28,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677062144] [2025-03-17 07:17:28,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:28,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:28,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 116 statements into 1 equivalence classes. [2025-03-17 07:17:28,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 116 of 116 statements. [2025-03-17 07:17:28,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:28,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2025-03-17 07:17:29,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:29,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677062144] [2025-03-17 07:17:29,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677062144] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:29,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111641700] [2025-03-17 07:17:29,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:29,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:29,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:29,195 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 07:17:29,196 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 07:17:29,346 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 116 statements into 1 equivalence classes. [2025-03-17 07:17:29,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 116 of 116 statements. [2025-03-17 07:17:29,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:29,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:29,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-17 07:17:29,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:29,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2025-03-17 07:17:29,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2025-03-17 07:17:31,625 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2025-03-17 07:17:31,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 13 [2025-03-17 07:17:31,635 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2025-03-17 07:17:31,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 13 [2025-03-17 07:17:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 81 proven. 28 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-17 07:17:31,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:17:44,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 156 [2025-03-17 07:17:44,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:44,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:44,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2025-03-17 07:17:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2025-03-17 07:17:44,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111641700] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:44,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 07:17:44,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 16] total 33 [2025-03-17 07:17:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182235485] [2025-03-17 07:17:44,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:17:44,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 07:17:44,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:44,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 07:17:44,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=949, Unknown=3, NotChecked=0, Total=1056 [2025-03-17 07:17:44,736 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2025-03-17 07:17:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:45,475 INFO L93 Difference]: Finished difference Result 235 states and 326 transitions. [2025-03-17 07:17:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 07:17:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 116 [2025-03-17 07:17:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:45,477 INFO L225 Difference]: With dead ends: 235 [2025-03-17 07:17:45,478 INFO L226 Difference]: Without dead ends: 125 [2025-03-17 07:17:45,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 189 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=127, Invalid=1202, Unknown=3, NotChecked=0, Total=1332 [2025-03-17 07:17:45,479 INFO L435 NwaCegarLoop]: 157 mSDtfsCounter, 9 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:45,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1907 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-17 07:17:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-03-17 07:17:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2025-03-17 07:17:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 77 states have (on average 1.2727272727272727) internal successors, (98), 78 states have internal predecessors, (98), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2025-03-17 07:17:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2025-03-17 07:17:45,489 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 116 [2025-03-17 07:17:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:45,489 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2025-03-17 07:17:45,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2025-03-17 07:17:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2025-03-17 07:17:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-03-17 07:17:45,491 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:45,491 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:45,498 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 07:17:45,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2025-03-17 07:17:45,692 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:45,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash -857640907, now seen corresponding path program 1 times [2025-03-17 07:17:45,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:45,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201604611] [2025-03-17 07:17:45,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:45,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:45,716 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-17 07:17:45,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-17 07:17:45,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:45,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-03-17 07:17:46,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201604611] [2025-03-17 07:17:46,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201604611] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132197059] [2025-03-17 07:17:46,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:46,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:46,083 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 07:17:46,084 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 07:17:46,185 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-17 07:17:46,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-17 07:17:46,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:46,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:46,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-03-17 07:17:46,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:46,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-03-17 07:17:46,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2025-03-17 07:17:46,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2025-03-17 07:17:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:46,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:46,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2025-03-17 07:17:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:46,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2025-03-17 07:17:46,439 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 07:17:46,439 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 1 case distinctions, treesize of input 25 treesize of output 22 [2025-03-17 07:17:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:46,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2025-03-17 07:17:46,474 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 07:17:46,474 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 1 case distinctions, treesize of input 27 treesize of output 24 [2025-03-17 07:17:46,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 07:17:46,494 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 07:17:46,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 07:17:46,564 INFO L349 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2025-03-17 07:17:46,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 119 [2025-03-17 07:17:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:46,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 90 [2025-03-17 07:17:46,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2025-03-17 07:17:46,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 07:17:46,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 42 [2025-03-17 07:17:46,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2025-03-17 07:17:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 117 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-17 07:17:48,412 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:17:48,746 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (+ 16 |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.offset|))) (and (forall ((|ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| Int) (v_ArrVal_243 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_243))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|))) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_244 (Array Int Int))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_244))) (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|))) |c_ULTIMATE.start_aws_linked_list_pop_front_harness_~#list~0#1.base|) .cse2) 0)))) is different from false [2025-03-17 07:17:48,841 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-17 07:17:48,842 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-17 07:17:48,907 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2025-03-17 07:17:48,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 202 [2025-03-17 07:17:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-17 07:17:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-17 07:17:48,985 INFO L349 Elim1Store]: treesize reduction 86, result has 45.2 percent of original size [2025-03-17 07:17:48,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 231 treesize of output 260 [2025-03-17 07:17:49,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:49,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 288 [2025-03-17 07:17:49,019 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 247 treesize of output 235 [2025-03-17 07:17:49,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:49,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 320 [2025-03-17 07:17:49,054 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 287 treesize of output 275 [2025-03-17 07:17:49,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2025-03-17 07:17:49,652 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 7 treesize of output 3 [2025-03-17 07:17:49,860 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-17 07:17:49,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:49,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 396 treesize of output 384 [2025-03-17 07:17:50,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:50,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 408 treesize of output 378 [2025-03-17 07:17:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132197059] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:51,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 07:17:51,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 17 [2025-03-17 07:17:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344132317] [2025-03-17 07:17:51,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 07:17:51,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 07:17:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:51,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 07:17:51,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=529, Unknown=2, NotChecked=46, Total=650 [2025-03-17 07:17:51,557 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 17 states, 15 states have (on average 6.333333333333333) internal successors, (95), 16 states have internal predecessors, (95), 8 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) [2025-03-17 07:17:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:53,660 INFO L93 Difference]: Finished difference Result 324 states and 451 transitions. [2025-03-17 07:17:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 07:17:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 6.333333333333333) internal successors, (95), 16 states have internal predecessors, (95), 8 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) Word has length 117 [2025-03-17 07:17:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:53,664 INFO L225 Difference]: With dead ends: 324 [2025-03-17 07:17:53,664 INFO L226 Difference]: Without dead ends: 211 [2025-03-17 07:17:53,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 192 SyntacticMatches, 16 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=211, Invalid=1513, Unknown=2, NotChecked=80, Total=1806 [2025-03-17 07:17:53,669 INFO L435 NwaCegarLoop]: 129 mSDtfsCounter, 281 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:53,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1578 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-17 07:17:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-03-17 07:17:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2025-03-17 07:17:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 133 states have internal predecessors, (165), 60 states have call successors, (60), 17 states have call predecessors, (60), 18 states have return successors, (65), 57 states have call predecessors, (65), 59 states have call successors, (65) [2025-03-17 07:17:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 290 transitions. [2025-03-17 07:17:53,700 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 290 transitions. Word has length 117 [2025-03-17 07:17:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:53,700 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 290 transitions. [2025-03-17 07:17:53,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 6.333333333333333) internal successors, (95), 16 states have internal predecessors, (95), 8 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) [2025-03-17 07:17:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 290 transitions. [2025-03-17 07:17:53,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-17 07:17:53,702 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:53,702 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:53,711 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 07:17:53,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:53,904 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:53,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1308403309, now seen corresponding path program 1 times [2025-03-17 07:17:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023083826] [2025-03-17 07:17:53,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:53,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-17 07:17:53,937 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-17 07:17:53,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:53,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2025-03-17 07:17:54,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:54,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023083826] [2025-03-17 07:17:54,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023083826] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:54,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572234927] [2025-03-17 07:17:54,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:54,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:54,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:54,119 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 07:17:54,121 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 07:17:54,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-17 07:17:54,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-17 07:17:54,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:54,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:54,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 07:17:54,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-03-17 07:17:54,332 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 07:17:54,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572234927] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:17:54,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 07:17:54,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2025-03-17 07:17:54,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359162304] [2025-03-17 07:17:54,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:17:54,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 07:17:54,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:54,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 07:17:54,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-03-17 07:17:54,334 INFO L87 Difference]: Start difference. First operand 208 states and 290 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2025-03-17 07:17:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:54,448 INFO L93 Difference]: Finished difference Result 401 states and 558 transitions. [2025-03-17 07:17:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 07:17:54,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 118 [2025-03-17 07:17:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:54,451 INFO L225 Difference]: With dead ends: 401 [2025-03-17 07:17:54,451 INFO L226 Difference]: Without dead ends: 218 [2025-03-17 07:17:54,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2025-03-17 07:17:54,452 INFO L435 NwaCegarLoop]: 156 mSDtfsCounter, 41 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:54,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 831 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 07:17:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2025-03-17 07:17:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2025-03-17 07:17:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 132 states have (on average 1.2727272727272727) internal successors, (168), 137 states have internal predecessors, (168), 60 states have call successors, (60), 17 states have call predecessors, (60), 19 states have return successors, (67), 57 states have call predecessors, (67), 59 states have call successors, (67) [2025-03-17 07:17:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 295 transitions. [2025-03-17 07:17:54,480 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 295 transitions. Word has length 118 [2025-03-17 07:17:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:54,481 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 295 transitions. [2025-03-17 07:17:54,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2025-03-17 07:17:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 295 transitions. [2025-03-17 07:17:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-17 07:17:54,483 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:54,483 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:54,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 07:17:54,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:54,683 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:54,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:54,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1218135115, now seen corresponding path program 1 times [2025-03-17 07:17:54,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814778672] [2025-03-17 07:17:54,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:54,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:54,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-17 07:17:54,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-17 07:17:54,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:54,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2025-03-17 07:17:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814778672] [2025-03-17 07:17:54,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814778672] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383238455] [2025-03-17 07:17:54,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:54,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:54,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:54,894 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 07:17:54,896 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 07:17:55,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-17 07:17:55,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-17 07:17:55,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:55,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:55,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 07:17:55,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-03-17 07:17:55,165 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 07:17:55,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383238455] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:17:55,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 07:17:55,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2025-03-17 07:17:55,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205551812] [2025-03-17 07:17:55,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:17:55,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 07:17:55,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:55,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 07:17:55,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2025-03-17 07:17:55,168 INFO L87 Difference]: Start difference. First operand 212 states and 295 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2025-03-17 07:17:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:55,322 INFO L93 Difference]: Finished difference Result 423 states and 591 transitions. [2025-03-17 07:17:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 07:17:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 120 [2025-03-17 07:17:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:55,325 INFO L225 Difference]: With dead ends: 423 [2025-03-17 07:17:55,326 INFO L226 Difference]: Without dead ends: 236 [2025-03-17 07:17:55,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2025-03-17 07:17:55,327 INFO L435 NwaCegarLoop]: 154 mSDtfsCounter, 50 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:55,327 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 967 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 07:17:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2025-03-17 07:17:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 216. [2025-03-17 07:17:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 136 states have (on average 1.2794117647058822) internal successors, (174), 141 states have internal predecessors, (174), 60 states have call successors, (60), 17 states have call predecessors, (60), 19 states have return successors, (67), 57 states have call predecessors, (67), 59 states have call successors, (67) [2025-03-17 07:17:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 301 transitions. [2025-03-17 07:17:55,350 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 301 transitions. Word has length 120 [2025-03-17 07:17:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:55,350 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 301 transitions. [2025-03-17 07:17:55,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2025-03-17 07:17:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 301 transitions. [2025-03-17 07:17:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-17 07:17:55,352 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:55,352 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:55,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 07:17:55,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:55,552 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:55,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash -778201632, now seen corresponding path program 1 times [2025-03-17 07:17:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:55,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935086601] [2025-03-17 07:17:55,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:55,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:55,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 121 statements into 1 equivalence classes. [2025-03-17 07:17:55,584 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 121 of 121 statements. [2025-03-17 07:17:55,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:55,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2025-03-17 07:17:55,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:55,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935086601] [2025-03-17 07:17:55,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935086601] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:55,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469932163] [2025-03-17 07:17:55,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:55,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:55,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:55,825 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 07:17:55,826 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 07:17:55,956 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 121 statements into 1 equivalence classes. [2025-03-17 07:17:56,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 121 of 121 statements. [2025-03-17 07:17:56,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:56,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:56,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-17 07:17:56,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-17 07:17:56,032 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 07:17:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469932163] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:17:56,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 07:17:56,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2025-03-17 07:17:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690660676] [2025-03-17 07:17:56,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:17:56,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 07:17:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:56,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 07:17:56,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-17 07:17:56,034 INFO L87 Difference]: Start difference. First operand 216 states and 301 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2025-03-17 07:17:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:56,075 INFO L93 Difference]: Finished difference Result 415 states and 586 transitions. [2025-03-17 07:17:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 07:17:56,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 121 [2025-03-17 07:17:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:56,078 INFO L225 Difference]: With dead ends: 415 [2025-03-17 07:17:56,079 INFO L226 Difference]: Without dead ends: 224 [2025-03-17 07:17:56,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-17 07:17:56,080 INFO L435 NwaCegarLoop]: 167 mSDtfsCounter, 2 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:56,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 328 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:17:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-03-17 07:17:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 218. [2025-03-17 07:17:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 138 states have (on average 1.2753623188405796) internal successors, (176), 143 states have internal predecessors, (176), 60 states have call successors, (60), 17 states have call predecessors, (60), 19 states have return successors, (67), 57 states have call predecessors, (67), 59 states have call successors, (67) [2025-03-17 07:17:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 303 transitions. [2025-03-17 07:17:56,111 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 303 transitions. Word has length 121 [2025-03-17 07:17:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:56,111 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 303 transitions. [2025-03-17 07:17:56,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2025-03-17 07:17:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 303 transitions. [2025-03-17 07:17:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2025-03-17 07:17:56,113 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:56,113 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:56,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 07:17:56,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:56,318 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:56,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1969173119, now seen corresponding path program 1 times [2025-03-17 07:17:56,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:56,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622129225] [2025-03-17 07:17:56,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:56,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:56,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 129 statements into 1 equivalence classes. [2025-03-17 07:17:56,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 129 of 129 statements. [2025-03-17 07:17:56,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:56,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-03-17 07:17:56,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:56,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622129225] [2025-03-17 07:17:56,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622129225] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:56,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893451485] [2025-03-17 07:17:56,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:56,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:56,617 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 07:17:56,618 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 07:17:56,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 129 statements into 1 equivalence classes. [2025-03-17 07:17:56,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 129 of 129 statements. [2025-03-17 07:17:56,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:56,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:56,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-17 07:17:56,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:56,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-03-17 07:17:56,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2025-03-17 07:17:56,909 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 07:17:56,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-03-17 07:17:56,911 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 5 treesize of output 3 [2025-03-17 07:17:56,918 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 07:17:56,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 07:17:56,951 INFO L349 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2025-03-17 07:17:56,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 85 [2025-03-17 07:17:56,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 20 [2025-03-17 07:17:56,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2025-03-17 07:17:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-17 07:17:58,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:17:58,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:58,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2025-03-17 07:17:58,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:58,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 340 treesize of output 310 [2025-03-17 07:17:58,305 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 196 treesize of output 180 [2025-03-17 07:17:58,432 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 24 treesize of output 20 [2025-03-17 07:17:58,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2025-03-17 07:17:58,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2025-03-17 07:17:58,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:58,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 80 [2025-03-17 07:17:58,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893451485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:58,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 07:17:58,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 18 [2025-03-17 07:17:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888254715] [2025-03-17 07:17:58,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 07:17:58,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 07:17:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:58,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 07:17:58,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=670, Unknown=1, NotChecked=0, Total=756 [2025-03-17 07:17:58,723 INFO L87 Difference]: Start difference. First operand 218 states and 303 transitions. Second operand has 18 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 states have internal predecessors, (107), 8 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2025-03-17 07:18:02,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:18:06,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:18:10,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:18:14,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:18:18,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:18:23,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:18:27,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:18:31,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 07:18:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:18:32,050 INFO L93 Difference]: Finished difference Result 435 states and 601 transitions. [2025-03-17 07:18:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 07:18:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 states have internal predecessors, (107), 8 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 129 [2025-03-17 07:18:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:18:32,052 INFO L225 Difference]: With dead ends: 435 [2025-03-17 07:18:32,052 INFO L226 Difference]: Without dead ends: 225 [2025-03-17 07:18:32,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 209 SyntacticMatches, 23 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=260, Invalid=1901, Unknown=1, NotChecked=0, Total=2162 [2025-03-17 07:18:32,057 INFO L435 NwaCegarLoop]: 136 mSDtfsCounter, 311 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 113 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2025-03-17 07:18:32,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1391 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 962 Invalid, 8 Unknown, 0 Unchecked, 32.9s Time] [2025-03-17 07:18:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2025-03-17 07:18:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2025-03-17 07:18:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 141 states have (on average 1.2695035460992907) internal successors, (179), 147 states have internal predecessors, (179), 60 states have call successors, (60), 17 states have call predecessors, (60), 20 states have return successors, (67), 57 states have call predecessors, (67), 59 states have call successors, (67) [2025-03-17 07:18:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 306 transitions. [2025-03-17 07:18:32,087 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 306 transitions. Word has length 129 [2025-03-17 07:18:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:18:32,087 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 306 transitions. [2025-03-17 07:18:32,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.294117647058823) internal successors, (107), 17 states have internal predecessors, (107), 8 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2025-03-17 07:18:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 306 transitions. [2025-03-17 07:18:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-03-17 07:18:32,089 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:18:32,089 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:18:32,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 07:18:32,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:18:32,290 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:18:32,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:18:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1514330467, now seen corresponding path program 1 times [2025-03-17 07:18:32,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:18:32,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668231578] [2025-03-17 07:18:32,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:18:32,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:18:32,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 130 statements into 1 equivalence classes. [2025-03-17 07:18:32,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 130 of 130 statements. [2025-03-17 07:18:32,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:18:32,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:18:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2025-03-17 07:18:32,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:18:32,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668231578] [2025-03-17 07:18:32,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668231578] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:18:32,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6685534] [2025-03-17 07:18:32,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:18:32,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:18:32,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:18:32,607 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 07:18:32,609 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 07:18:32,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 130 statements into 1 equivalence classes. [2025-03-17 07:18:32,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 130 of 130 statements. [2025-03-17 07:18:32,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:18:32,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:18:32,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 07:18:32,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:18:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2025-03-17 07:18:32,874 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 07:18:32,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6685534] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:18:32,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 07:18:32,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2025-03-17 07:18:32,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337007848] [2025-03-17 07:18:32,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:18:32,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 07:18:32,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:18:32,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 07:18:32,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2025-03-17 07:18:32,876 INFO L87 Difference]: Start difference. First operand 222 states and 306 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 8 states have internal predecessors, (71), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-17 07:18:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:18:33,015 INFO L93 Difference]: Finished difference Result 423 states and 574 transitions. [2025-03-17 07:18:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 07:18:33,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 8 states have internal predecessors, (71), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 130 [2025-03-17 07:18:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:18:33,017 INFO L225 Difference]: With dead ends: 423 [2025-03-17 07:18:33,017 INFO L226 Difference]: Without dead ends: 226 [2025-03-17 07:18:33,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2025-03-17 07:18:33,018 INFO L435 NwaCegarLoop]: 156 mSDtfsCounter, 45 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 07:18:33,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 974 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 07:18:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2025-03-17 07:18:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2025-03-17 07:18:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 141 states have (on average 1.2553191489361701) internal successors, (177), 147 states have internal predecessors, (177), 60 states have call successors, (60), 17 states have call predecessors, (60), 20 states have return successors, (67), 57 states have call predecessors, (67), 59 states have call successors, (67) [2025-03-17 07:18:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 304 transitions. [2025-03-17 07:18:33,044 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 304 transitions. Word has length 130 [2025-03-17 07:18:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:18:33,045 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 304 transitions. [2025-03-17 07:18:33,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 8 states have internal predecessors, (71), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-17 07:18:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 304 transitions. [2025-03-17 07:18:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2025-03-17 07:18:33,047 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:18:33,047 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:18:33,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 07:18:33,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-03-17 07:18:33,248 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:18:33,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:18:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -988945451, now seen corresponding path program 1 times [2025-03-17 07:18:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:18:33,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756033749] [2025-03-17 07:18:33,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:18:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:18:33,269 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 132 statements into 1 equivalence classes. [2025-03-17 07:18:33,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 132 of 132 statements. [2025-03-17 07:18:33,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:18:33,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:18:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2025-03-17 07:18:33,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:18:33,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756033749] [2025-03-17 07:18:33,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756033749] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:18:33,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543314014] [2025-03-17 07:18:33,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:18:33,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:18:33,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:18:33,620 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:18:33,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 07:18:33,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 132 statements into 1 equivalence classes. [2025-03-17 07:18:33,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 132 of 132 statements. [2025-03-17 07:18:33,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:18:33,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:18:33,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 07:18:33,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:18:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2025-03-17 07:18:34,007 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 07:18:34,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543314014] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:18:34,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 07:18:34,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2025-03-17 07:18:34,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509200176] [2025-03-17 07:18:34,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:18:34,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 07:18:34,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:18:34,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 07:18:34,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2025-03-17 07:18:34,008 INFO L87 Difference]: Start difference. First operand 222 states and 304 transitions. Second operand has 9 states, 8 states have (on average 9.125) internal successors, (73), 9 states have internal predecessors, (73), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-17 07:18:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:18:34,199 INFO L93 Difference]: Finished difference Result 423 states and 572 transitions. [2025-03-17 07:18:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 07:18:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 9 states have internal predecessors, (73), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 132 [2025-03-17 07:18:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:18:34,202 INFO L225 Difference]: With dead ends: 423 [2025-03-17 07:18:34,202 INFO L226 Difference]: Without dead ends: 224 [2025-03-17 07:18:34,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2025-03-17 07:18:34,205 INFO L435 NwaCegarLoop]: 153 mSDtfsCounter, 54 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 07:18:34,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1101 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 07:18:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-03-17 07:18:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2025-03-17 07:18:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 135 states have (on average 1.2518518518518518) internal successors, (169), 139 states have internal predecessors, (169), 60 states have call successors, (60), 17 states have call predecessors, (60), 18 states have return successors, (63), 57 states have call predecessors, (63), 59 states have call successors, (63) [2025-03-17 07:18:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 292 transitions. [2025-03-17 07:18:34,231 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 292 transitions. Word has length 132 [2025-03-17 07:18:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:18:34,232 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 292 transitions. [2025-03-17 07:18:34,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.125) internal successors, (73), 9 states have internal predecessors, (73), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-17 07:18:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 292 transitions. [2025-03-17 07:18:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2025-03-17 07:18:34,233 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:18:34,233 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:18:34,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 07:18:34,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:18:34,437 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:18:34,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:18:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2144216375, now seen corresponding path program 1 times [2025-03-17 07:18:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:18:34,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405963050] [2025-03-17 07:18:34,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:18:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:18:34,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 141 statements into 1 equivalence classes. [2025-03-17 07:18:34,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 141 of 141 statements. [2025-03-17 07:18:34,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:18:34,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:18:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2025-03-17 07:18:34,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:18:34,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405963050] [2025-03-17 07:18:34,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405963050] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:18:34,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677953238] [2025-03-17 07:18:34,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:18:34,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:18:34,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:18:34,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:18:34,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 07:18:34,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 141 statements into 1 equivalence classes. [2025-03-17 07:18:34,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 141 of 141 statements. [2025-03-17 07:18:34,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:18:34,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:18:34,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 162 conjuncts are in the unsatisfiable core [2025-03-17 07:18:34,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:18:35,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2025-03-17 07:18:35,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-17 07:18:35,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-17 07:18:35,179 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 07:18:35,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 07:18:35,224 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2025-03-17 07:18:35,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 73 [2025-03-17 07:18:35,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 43 [2025-03-17 07:18:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 125 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-17 07:18:37,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:18:38,765 INFO L349 Elim1Store]: treesize reduction 2701, result has 25.4 percent of original size [2025-03-17 07:18:38,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 240773 treesize of output 230507 [2025-03-17 07:18:54,948 WARN L286 SmtUtils]: Spent 14.95s on a formula simplification. DAG size of input: 1314 DAG size of output: 496 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2025-03-17 07:18:54,951 INFO L349 Elim1Store]: treesize reduction 4759, result has 27.6 percent of original size [2025-03-17 07:18:54,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 17 select indices, 17 select index equivalence classes, 3 disjoint index pairs (out of 136 index pairs), introduced 24 new quantified variables, introduced 215 case distinctions, treesize of input 2480287 treesize of output 2328055