./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.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 6a8b3323a92d99d7113afe189cb74ca3fccfd0743fd857bf4a57e73eb6656833 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 07:16:33,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 07:16:33,648 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2025-03-17 07:16:33,654 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 07:16:33,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 07:16:33,675 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 07:16:33,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 07:16:33,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 07:16:33,677 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 07:16:33,677 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 07:16:33,678 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 07:16:33,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 07:16:33,678 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 07:16:33,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 07:16:33,678 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 07:16:33,679 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 07:16:33,679 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 07:16:33,679 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 07:16:33,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 07:16:33,679 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 07:16:33,679 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 07:16:33,679 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 07:16:33,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 07:16:33,680 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 07:16:33,680 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 07:16:33,680 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 07:16:33,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 07:16:33,680 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 07:16:33,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 07:16:33,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 07:16:33,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 07:16:33,680 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 07:16:33,680 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 07:16:33,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 07:16:33,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 07:16:33,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 07:16:33,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 07:16:33,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 07:16:33,681 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 07:16:33,681 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 07:16:33,681 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 -> 6a8b3323a92d99d7113afe189cb74ca3fccfd0743fd857bf4a57e73eb6656833 [2025-03-17 07:16:33,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 07:16:33,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 07:16:33,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 07:16:33,922 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 07:16:33,925 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 07:16:33,926 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2025-03-17 07:16:35,123 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383d98f08/851fae2200704002b2f410dc05ab75c5/FLAG4c955494b [2025-03-17 07:16:35,637 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 07:16:35,638 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2025-03-17 07:16:35,674 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383d98f08/851fae2200704002b2f410dc05ab75c5/FLAG4c955494b [2025-03-17 07:16:35,720 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383d98f08/851fae2200704002b2f410dc05ab75c5 [2025-03-17 07:16:35,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 07:16:35,724 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 07:16:35,725 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 07:16:35,725 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 07:16:35,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 07:16:35,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:16:35" (1/1) ... [2025-03-17 07:16:35,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489d7242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:35, skipping insertion in model container [2025-03-17 07:16:35,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:16:35" (1/1) ... [2025-03-17 07:16:35,794 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 07:16:35,995 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2025-03-17 07:16:36,000 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2025-03-17 07:16:36,479 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,480 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,480 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,481 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,481 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,491 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,492 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,496 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,497 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,499 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,499 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,500 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,500 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,881 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[150301,150314] [2025-03-17 07:16:36,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 07:16:36,904 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 07:16:36,920 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2025-03-17 07:16:36,921 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2025-03-17 07:16:36,967 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,968 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,968 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,968 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,969 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,977 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,978 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,979 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,979 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,980 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,980 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,981 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:36,981 WARN L1731 CHandler]: Possible shadowing of function index [2025-03-17 07:16:37,061 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[150301,150314] [2025-03-17 07:16:37,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 07:16:37,230 INFO L204 MainTranslator]: Completed translation [2025-03-17 07:16:37,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37 WrapperNode [2025-03-17 07:16:37,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 07:16:37,232 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 07:16:37,232 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 07:16:37,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 07:16:37,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,317 INFO L138 Inliner]: procedures = 668, calls = 1032, calls flagged for inlining = 49, calls inlined = 3, statements flattened = 27 [2025-03-17 07:16:37,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 07:16:37,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 07:16:37,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 07:16:37,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 07:16:37,325 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,330 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,346 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-03-17 07:16:37,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,353 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,355 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 07:16:37,361 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 07:16:37,364 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 07:16:37,365 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 07:16:37,365 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (1/1) ... [2025-03-17 07:16:37,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 07:16:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:37,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 07:16:37,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 07:16:37,437 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2025-03-17 07:16:37,438 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2025-03-17 07:16:37,438 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2025-03-17 07:16:37,438 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2025-03-17 07:16:37,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 07:16:37,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-17 07:16:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 07:16:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2025-03-17 07:16:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2025-03-17 07:16:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2025-03-17 07:16:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-17 07:16:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 07:16:37,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 07:16:37,617 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 07:16:37,619 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 07:16:37,795 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2025-03-17 07:16:37,795 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 07:16:37,801 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 07:16:37,802 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 07:16:37,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:16:37 BoogieIcfgContainer [2025-03-17 07:16:37,802 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 07:16:37,804 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 07:16:37,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 07:16:37,807 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 07:16:37,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:16:35" (1/3) ... [2025-03-17 07:16:37,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b18671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:16:37, skipping insertion in model container [2025-03-17 07:16:37,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:16:37" (2/3) ... [2025-03-17 07:16:37,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b18671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:16:37, skipping insertion in model container [2025-03-17 07:16:37,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:16:37" (3/3) ... [2025-03-17 07:16:37,808 INFO L128 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2025-03-17 07:16:37,818 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 07:16:37,819 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_node_reset_harness-1.i that has 8 procedures, 44 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-03-17 07:16:37,881 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 07:16:37,892 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;@3a842ec8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 07:16:37,893 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-17 07:16:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-17 07:16:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-17 07:16:37,900 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:37,900 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:37,900 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:37,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash -984949872, now seen corresponding path program 1 times [2025-03-17 07:16:37,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:37,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877015438] [2025-03-17 07:16:37,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:38,024 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 07:16:38,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 07:16:38,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:38,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:38,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:38,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877015438] [2025-03-17 07:16:38,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877015438] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:16:38,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 07:16:38,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 07:16:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442831116] [2025-03-17 07:16:38,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:16:38,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 07:16:38,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:38,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 07:16:38,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 07:16:38,180 INFO L87 Difference]: Start difference. First operand has 36 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 07:16:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:38,200 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2025-03-17 07:16:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 07:16:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-03-17 07:16:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:38,221 INFO L225 Difference]: With dead ends: 66 [2025-03-17 07:16:38,221 INFO L226 Difference]: Without dead ends: 33 [2025-03-17 07:16:38,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 07:16:38,226 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:38,227 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:16:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-17 07:16:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-17 07:16:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-17 07:16:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2025-03-17 07:16:38,254 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 18 [2025-03-17 07:16:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:38,255 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2025-03-17 07:16:38,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 07:16:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2025-03-17 07:16:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-17 07:16:38,257 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:38,257 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:38,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 07:16:38,257 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:38,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash -736703110, now seen corresponding path program 1 times [2025-03-17 07:16:38,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:38,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224197490] [2025-03-17 07:16:38,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:38,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:38,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 07:16:38,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 07:16:38,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:38,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:38,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:38,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224197490] [2025-03-17 07:16:38,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224197490] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:16:38,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 07:16:38,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 07:16:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350330101] [2025-03-17 07:16:38,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:16:38,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 07:16:38,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:38,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 07:16:38,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 07:16:38,653 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-17 07:16:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:38,702 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2025-03-17 07:16:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 07:16:38,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2025-03-17 07:16:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:38,705 INFO L225 Difference]: With dead ends: 43 [2025-03-17 07:16:38,705 INFO L226 Difference]: Without dead ends: 41 [2025-03-17 07:16:38,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 07:16:38,706 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:38,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 166 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:16:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-17 07:16:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-17 07:16:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-17 07:16:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2025-03-17 07:16:38,714 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2025-03-17 07:16:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:38,716 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2025-03-17 07:16:38,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-17 07:16:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2025-03-17 07:16:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-17 07:16:38,717 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:38,717 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:38,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 07:16:38,718 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:38,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:38,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1972149933, now seen corresponding path program 1 times [2025-03-17 07:16:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:38,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257772161] [2025-03-17 07:16:38,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:38,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:38,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 07:16:38,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 07:16:38,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:38,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:38,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257772161] [2025-03-17 07:16:38,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257772161] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:16:38,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 07:16:38,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 07:16:38,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832774133] [2025-03-17 07:16:38,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:16:38,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 07:16:38,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:38,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 07:16:38,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 07:16:38,892 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-17 07:16:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:38,913 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2025-03-17 07:16:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 07:16:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-17 07:16:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:38,914 INFO L225 Difference]: With dead ends: 70 [2025-03-17 07:16:38,915 INFO L226 Difference]: Without dead ends: 41 [2025-03-17 07:16:38,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 07:16:38,915 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:38,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:16:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-17 07:16:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-03-17 07:16:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-17 07:16:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2025-03-17 07:16:38,923 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 25 [2025-03-17 07:16:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:38,923 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2025-03-17 07:16:38,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-17 07:16:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2025-03-17 07:16:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-17 07:16:38,924 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:38,924 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:38,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 07:16:38,924 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:38,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash -465590105, now seen corresponding path program 1 times [2025-03-17 07:16:38,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:38,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91793675] [2025-03-17 07:16:38,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:38,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:38,942 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 07:16:38,969 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 07:16:38,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:38,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:39,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91793675] [2025-03-17 07:16:39,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91793675] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:39,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854334255] [2025-03-17 07:16:39,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:39,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:39,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:39,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:16:39,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 07:16:39,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 07:16:39,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 07:16:39,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:39,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:39,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-17 07:16:39,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:39,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 07:16:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:39,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:40,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2025-03-17 07:16:40,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-17 07:16:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:40,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854334255] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:40,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:40,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 10] total 24 [2025-03-17 07:16:40,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588250306] [2025-03-17 07:16:40,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:40,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 07:16:40,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:40,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 07:16:40,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2025-03-17 07:16:40,207 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:40,724 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2025-03-17 07:16:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 07:16:40,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 26 [2025-03-17 07:16:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:40,725 INFO L225 Difference]: With dead ends: 77 [2025-03-17 07:16:40,725 INFO L226 Difference]: Without dead ends: 48 [2025-03-17 07:16:40,726 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 07:16:40,726 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:40,727 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 327 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 07:16:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-17 07:16:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2025-03-17 07:16:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2025-03-17 07:16:40,734 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 26 [2025-03-17 07:16:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:40,734 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2025-03-17 07:16:40,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2025-03-17 07:16:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-17 07:16:40,735 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:40,735 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:40,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 07:16:40,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:40,936 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:40,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:40,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1419119820, now seen corresponding path program 1 times [2025-03-17 07:16:40,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:40,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89669340] [2025-03-17 07:16:40,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:40,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 07:16:40,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 07:16:40,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:40,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 07:16:41,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:41,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89669340] [2025-03-17 07:16:41,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89669340] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:41,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935326926] [2025-03-17 07:16:41,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:16:41,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:41,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:41,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:16:41,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 07:16:41,269 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 07:16:41,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 07:16:41,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:16:41,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:41,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-17 07:16:41,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:41,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 07:16:41,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 07:16:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:41,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:42,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2025-03-17 07:16:42,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2025-03-17 07:16:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:42,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935326926] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:42,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:42,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 12] total 29 [2025-03-17 07:16:42,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447632912] [2025-03-17 07:16:42,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:42,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 07:16:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:42,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 07:16:42,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2025-03-17 07:16:42,247 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:42,895 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2025-03-17 07:16:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 07:16:42,895 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 29 [2025-03-17 07:16:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:42,896 INFO L225 Difference]: With dead ends: 86 [2025-03-17 07:16:42,896 INFO L226 Difference]: Without dead ends: 53 [2025-03-17 07:16:42,897 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2025-03-17 07:16:42,898 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:42,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 383 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 07:16:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-17 07:16:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2025-03-17 07:16:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2025-03-17 07:16:42,906 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 29 [2025-03-17 07:16:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:42,907 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2025-03-17 07:16:42,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2025-03-17 07:16:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-17 07:16:42,908 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:42,908 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:42,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 07:16:43,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:43,110 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:43,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:43,110 INFO L85 PathProgramCache]: Analyzing trace with hash -246667675, now seen corresponding path program 2 times [2025-03-17 07:16:43,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:43,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246183166] [2025-03-17 07:16:43,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 07:16:43,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:43,131 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 07:16:43,152 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 07:16:43,153 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 07:16:43,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 07:16:43,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:43,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246183166] [2025-03-17 07:16:43,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246183166] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:43,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295447874] [2025-03-17 07:16:43,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 07:16:43,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:43,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:43,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:16:43,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 07:16:43,412 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 07:16:43,440 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 07:16:43,440 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 07:16:43,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:43,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-17 07:16:43,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:43,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 07:16:43,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 07:16:43,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:43,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-03-17 07:16:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:43,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:44,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2025-03-17 07:16:44,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2025-03-17 07:16:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295447874] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:44,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:44,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 15] total 35 [2025-03-17 07:16:44,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288008286] [2025-03-17 07:16:44,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:44,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-17 07:16:44,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:44,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-17 07:16:44,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1084, Unknown=0, NotChecked=0, Total=1190 [2025-03-17 07:16:44,956 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 35 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:45,931 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2025-03-17 07:16:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-17 07:16:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2025-03-17 07:16:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:45,932 INFO L225 Difference]: With dead ends: 94 [2025-03-17 07:16:45,932 INFO L226 Difference]: Without dead ends: 59 [2025-03-17 07:16:45,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=2153, Unknown=0, NotChecked=0, Total=2352 [2025-03-17 07:16:45,933 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:45,933 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 462 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-17 07:16:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-17 07:16:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2025-03-17 07:16:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 38 states have internal predecessors, (45), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2025-03-17 07:16:45,948 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 32 [2025-03-17 07:16:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:45,948 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2025-03-17 07:16:45,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2025-03-17 07:16:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-17 07:16:45,951 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:45,951 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:45,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 07:16:46,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:46,152 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:46,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:46,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1427921270, now seen corresponding path program 3 times [2025-03-17 07:16:46,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598343327] [2025-03-17 07:16:46,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 07:16:46,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:46,163 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 4 equivalence classes. [2025-03-17 07:16:46,193 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 33 of 35 statements. [2025-03-17 07:16:46,193 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 07:16:46,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 07:16:46,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:46,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598343327] [2025-03-17 07:16:46,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598343327] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:46,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69961153] [2025-03-17 07:16:46,368 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 07:16:46,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:46,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:16:46,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 07:16:46,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 4 equivalence classes. [2025-03-17 07:16:46,513 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 33 of 35 statements. [2025-03-17 07:16:46,513 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 07:16:46,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:46,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 07:16:46,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 07:16:46,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 07:16:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69961153] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:46,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:46,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-03-17 07:16:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096418380] [2025-03-17 07:16:46,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:46,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 07:16:46,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:46,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 07:16:46,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2025-03-17 07:16:46,655 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-17 07:16:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:46,844 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2025-03-17 07:16:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 07:16:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2025-03-17 07:16:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:46,845 INFO L225 Difference]: With dead ends: 97 [2025-03-17 07:16:46,845 INFO L226 Difference]: Without dead ends: 58 [2025-03-17 07:16:46,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2025-03-17 07:16:46,846 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:46,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 307 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:16:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-17 07:16:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-03-17 07:16:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2025-03-17 07:16:46,855 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 35 [2025-03-17 07:16:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:46,856 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2025-03-17 07:16:46,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-17 07:16:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2025-03-17 07:16:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-17 07:16:46,856 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:46,857 INFO L218 NwaCegarLoop]: trace histogram [10, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:46,864 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 07:16:47,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:47,057 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:47,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:47,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2014102602, now seen corresponding path program 4 times [2025-03-17 07:16:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:47,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755474991] [2025-03-17 07:16:47,058 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 07:16:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:47,074 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-17 07:16:47,114 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 07:16:47,117 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 07:16:47,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 07:16:47,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:47,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755474991] [2025-03-17 07:16:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755474991] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:47,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96843938] [2025-03-17 07:16:47,503 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 07:16:47,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:47,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:47,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:16:47,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 07:16:47,597 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 41 statements into 2 equivalence classes. [2025-03-17 07:16:47,790 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 07:16:47,790 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 07:16:47,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:47,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 86 conjuncts are in the unsatisfiable core [2025-03-17 07:16:47,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:47,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 07:16:47,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 07:16:47,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:47,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-03-17 07:16:47,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:47,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-03-17 07:16:48,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:48,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-03-17 07:16:48,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:48,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-03-17 07:16:48,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:48,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-03-17 07:16:48,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:48,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-03-17 07:16:48,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:48,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-03-17 07:16:48,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:48,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2025-03-17 07:16:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:49,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:16:52,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2025-03-17 07:16:52,883 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 123 treesize of output 119 [2025-03-17 07:16:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:52,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96843938] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:16:52,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:16:52,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 26, 22] total 57 [2025-03-17 07:16:52,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736299302] [2025-03-17 07:16:52,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:16:52,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-17 07:16:52,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:16:52,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-17 07:16:52,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2851, Unknown=0, NotChecked=0, Total=3192 [2025-03-17 07:16:52,986 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:16:54,515 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2025-03-17 07:16:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-17 07:16:54,516 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2025-03-17 07:16:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:16:54,517 INFO L225 Difference]: With dead ends: 106 [2025-03-17 07:16:54,517 INFO L226 Difference]: Without dead ends: 69 [2025-03-17 07:16:54,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2025-03-17 07:16:54,518 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-17 07:16:54,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 633 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-17 07:16:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-17 07:16:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2025-03-17 07:16:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 47 states have internal predecessors, (56), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:16:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2025-03-17 07:16:54,532 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 41 [2025-03-17 07:16:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:16:54,532 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2025-03-17 07:16:54,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:16:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2025-03-17 07:16:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-17 07:16:54,533 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:16:54,533 INFO L218 NwaCegarLoop]: trace histogram [11, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:16:54,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 07:16:54,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:54,734 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:16:54,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:16:54,735 INFO L85 PathProgramCache]: Analyzing trace with hash 307957603, now seen corresponding path program 5 times [2025-03-17 07:16:54,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:16:54,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5179793] [2025-03-17 07:16:54,735 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 07:16:54,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:16:54,754 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 7 equivalence classes. [2025-03-17 07:16:54,883 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 07:16:54,883 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-17 07:16:54,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-17 07:16:55,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:16:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5179793] [2025-03-17 07:16:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5179793] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:16:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123914107] [2025-03-17 07:16:55,474 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 07:16:55,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:16:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:16:55,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:16:55,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 07:16:55,553 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 44 statements into 7 equivalence classes. [2025-03-17 07:16:56,652 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 07:16:56,653 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-17 07:16:56,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:16:56,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 82 conjuncts are in the unsatisfiable core [2025-03-17 07:16:56,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:16:56,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 07:16:56,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 07:16:56,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:56,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-03-17 07:16:56,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:56,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-03-17 07:16:56,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:56,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-03-17 07:16:56,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:56,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-03-17 07:16:56,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:56,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-03-17 07:16:56,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:56,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-03-17 07:16:57,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:57,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-03-17 07:16:57,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:57,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2025-03-17 07:16:57,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:16:57,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2025-03-17 07:16:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:16:58,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:17:03,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 74 [2025-03-17 07:17:03,241 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 132 treesize of output 128 [2025-03-17 07:17:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 49 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:17:03,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123914107] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:17:03,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:17:03,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 22] total 55 [2025-03-17 07:17:03,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670195978] [2025-03-17 07:17:03,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:17:03,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-17 07:17:03,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:03,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-17 07:17:03,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2625, Unknown=0, NotChecked=0, Total=2970 [2025-03-17 07:17:03,355 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 55 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2025-03-17 07:17:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:05,308 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2025-03-17 07:17:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-17 07:17:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2025-03-17 07:17:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:05,310 INFO L225 Difference]: With dead ends: 113 [2025-03-17 07:17:05,310 INFO L226 Difference]: Without dead ends: 74 [2025-03-17 07:17:05,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=523, Invalid=4033, Unknown=0, NotChecked=0, Total=4556 [2025-03-17 07:17:05,312 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:05,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 939 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-17 07:17:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-17 07:17:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2025-03-17 07:17:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 50 states have internal predecessors, (61), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:17:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2025-03-17 07:17:05,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 44 [2025-03-17 07:17:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:05,328 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2025-03-17 07:17:05,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2025-03-17 07:17:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2025-03-17 07:17:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-17 07:17:05,329 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:05,329 INFO L218 NwaCegarLoop]: trace histogram [12, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:05,338 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 07:17:05,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:05,530 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:05,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash 366055176, now seen corresponding path program 6 times [2025-03-17 07:17:05,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:05,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855982432] [2025-03-17 07:17:05,530 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 07:17:05,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:05,549 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 7 equivalence classes. [2025-03-17 07:17:05,637 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 47 of 47 statements. [2025-03-17 07:17:05,638 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-17 07:17:05,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-17 07:17:05,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:05,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855982432] [2025-03-17 07:17:05,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855982432] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:05,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112929512] [2025-03-17 07:17:05,978 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 07:17:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:05,981 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 07:17:05,982 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 07:17:06,069 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 7 equivalence classes. [2025-03-17 07:17:08,917 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 47 of 47 statements. [2025-03-17 07:17:08,917 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-17 07:17:08,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:08,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 114 conjuncts are in the unsatisfiable core [2025-03-17 07:17:08,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:09,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 07:17:09,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 07:17:09,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-03-17 07:17:09,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-03-17 07:17:09,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-03-17 07:17:09,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-03-17 07:17:09,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-03-17 07:17:09,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-03-17 07:17:09,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2025-03-17 07:17:09,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2025-03-17 07:17:09,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2025-03-17 07:17:09,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:09,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2025-03-17 07:17:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:17:11,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 07:17:18,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2025-03-17 07:17:18,564 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 141 treesize of output 137 [2025-03-17 07:17:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 07:17:18,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112929512] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 07:17:18,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 07:17:18,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 31, 28] total 70 [2025-03-17 07:17:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085622598] [2025-03-17 07:17:18,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 07:17:18,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-03-17 07:17:18,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:18,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-03-17 07:17:18,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4432, Unknown=0, NotChecked=0, Total=4830 [2025-03-17 07:17:18,687 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 70 states, 67 states have (on average 1.462686567164179) internal successors, (98), 66 states have internal predecessors, (98), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:17:42,857 WARN L286 SmtUtils]: Spent 22.16s on a formula simplification that was a NOOP. DAG size: 182 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-17 07:17:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:45,012 INFO L93 Difference]: Finished difference Result 123 states and 157 transitions. [2025-03-17 07:17:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-17 07:17:45,012 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 67 states have (on average 1.462686567164179) internal successors, (98), 66 states have internal predecessors, (98), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2025-03-17 07:17:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:45,013 INFO L225 Difference]: With dead ends: 123 [2025-03-17 07:17:45,013 INFO L226 Difference]: Without dead ends: 82 [2025-03-17 07:17:45,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=513, Invalid=6293, Unknown=0, NotChecked=0, Total=6806 [2025-03-17 07:17:45,015 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:45,016 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1102 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-03-17 07:17:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-17 07:17:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2025-03-17 07:17:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.32) internal successors, (66), 53 states have internal predecessors, (66), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2025-03-17 07:17:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2025-03-17 07:17:45,058 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 47 [2025-03-17 07:17:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:45,058 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2025-03-17 07:17:45,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 67 states have (on average 1.462686567164179) internal successors, (98), 66 states have internal predecessors, (98), 7 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-17 07:17:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2025-03-17 07:17:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-17 07:17:45,059 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:45,059 INFO L218 NwaCegarLoop]: trace histogram [13, 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] [2025-03-17 07:17:45,071 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 07:17:45,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:45,260 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:45,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1367959904, now seen corresponding path program 1 times [2025-03-17 07:17:45,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:45,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053956551] [2025-03-17 07:17:45,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 07:17:45,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:45,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-17 07:17:45,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-17 07:17:45,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:45,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-03-17 07:17:45,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:45,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053956551] [2025-03-17 07:17:45,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053956551] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 07:17:45,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 07:17:45,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 07:17:45,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535577920] [2025-03-17 07:17:45,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 07:17:45,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 07:17:45,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 07:17:45,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 07:17:45,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 07:17:45,519 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-17 07:17:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 07:17:45,577 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2025-03-17 07:17:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 07:17:45,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2025-03-17 07:17:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 07:17:45,578 INFO L225 Difference]: With dead ends: 76 [2025-03-17 07:17:45,578 INFO L226 Difference]: Without dead ends: 67 [2025-03-17 07:17:45,579 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 07:17:45,579 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 07:17:45,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 180 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 07:17:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-17 07:17:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2025-03-17 07:17:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.3) internal successors, (65), 53 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-17 07:17:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2025-03-17 07:17:45,600 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 52 [2025-03-17 07:17:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 07:17:45,601 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2025-03-17 07:17:45,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-17 07:17:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2025-03-17 07:17:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-17 07:17:45,602 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 07:17:45,602 INFO L218 NwaCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 07:17:45,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 07:17:45,602 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 07:17:45,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 07:17:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1139089185, now seen corresponding path program 7 times [2025-03-17 07:17:45,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 07:17:45,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146010386] [2025-03-17 07:17:45,603 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 07:17:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 07:17:45,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-17 07:17:45,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 07:17:45,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:45,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-17 07:17:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 07:17:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146010386] [2025-03-17 07:17:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146010386] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 07:17:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049373617] [2025-03-17 07:17:46,105 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 07:17:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 07:17:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 07:17:46,107 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 07:17:46,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 07:17:46,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-17 07:17:46,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 07:17:46,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 07:17:46,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 07:17:46,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-03-17 07:17:46,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 07:17:46,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 07:17:46,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-03-17 07:17:46,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:46,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-03-17 07:17:46,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:46,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-03-17 07:17:46,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:46,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2025-03-17 07:17:46,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:46,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-03-17 07:17:46,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:46,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-03-17 07:17:46,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 07:17:46,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2025-03-17 07:17:46,888 INFO L349 Elim1Store]: treesize reduction 142, result has 33.3 percent of original size [2025-03-17 07:17:46,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 84 treesize of output 104 [2025-03-17 07:17:47,098 INFO L349 Elim1Store]: treesize reduction 224, result has 26.3 percent of original size [2025-03-17 07:17:47,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 93 treesize of output 116 [2025-03-17 07:17:47,301 INFO L349 Elim1Store]: treesize reduction 314, result has 22.1 percent of original size [2025-03-17 07:17:47,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 102 treesize of output 128 [2025-03-17 07:17:47,581 INFO L349 Elim1Store]: treesize reduction 412, result has 19.2 percent of original size [2025-03-17 07:17:47,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 111 treesize of output 140 [2025-03-17 07:17:51,920 INFO L349 Elim1Store]: treesize reduction 518, result has 17.1 percent of original size [2025-03-17 07:17:51,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 120 treesize of output 152