./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 32bit --witnessprinter.graph.data.programhash 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 04:13:19,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 04:13:19,170 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 04:13:19,176 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 04:13:19,176 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 04:13:19,203 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 04:13:19,203 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 04:13:19,203 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 04:13:19,204 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 04:13:19,204 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 04:13:19,204 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 04:13:19,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 04:13:19,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 04:13:19,204 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 04:13:19,204 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 04:13:19,204 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 04:13:19,205 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 04:13:19,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:13:19,206 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:13:19,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:13:19,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:13:19,206 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 04:13:19,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:13:19,206 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:13:19,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:13:19,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:13:19,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 04:13:19,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 04:13:19,209 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 04:13:19,209 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 04:13:19,209 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 04:13:19,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 04:13:19,209 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 04:13:19,209 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 04:13:19,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 04:13:19,210 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 04:13:19,210 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-jdk21/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96f1211cbeeae798f0ae4041c6e80d5023e7b1c38257b583d7afbb4e6848597b [2025-01-09 04:13:19,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 04:13:19,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 04:13:19,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 04:13:19,507 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 04:13:19,508 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 04:13:19,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2025-01-09 04:13:20,827 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bb0bc0aab/92fd8db3b59f496992eeacd86c493e83/FLAGde16aebb9 [2025-01-09 04:13:21,072 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 04:13:21,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c [2025-01-09 04:13:21,089 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bb0bc0aab/92fd8db3b59f496992eeacd86c493e83/FLAGde16aebb9 [2025-01-09 04:13:21,109 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/bb0bc0aab/92fd8db3b59f496992eeacd86c493e83 [2025-01-09 04:13:21,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 04:13:21,112 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 04:13:21,114 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 04:13:21,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 04:13:21,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 04:13:21,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e42b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21, skipping insertion in model container [2025-01-09 04:13:21,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,135 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 04:13:21,258 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2025-01-09 04:13:21,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:13:21,295 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 04:13:21,305 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2025-01-09 04:13:21,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:13:21,337 INFO L204 MainTranslator]: Completed translation [2025-01-09 04:13:21,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21 WrapperNode [2025-01-09 04:13:21,339 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 04:13:21,340 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 04:13:21,340 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 04:13:21,340 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 04:13:21,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,354 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,376 INFO L138 Inliner]: procedures = 16, calls = 86, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2025-01-09 04:13:21,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 04:13:21,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 04:13:21,379 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 04:13:21,379 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 04:13:21,386 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,390 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,412 INFO L175 MemorySlicer]: Split 57 memory accesses to 7 slices as follows [2, 5, 4, 9, 15, 15, 7]. 26 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 16 writes are split as follows [0, 1, 1, 4, 4, 4, 2]. [2025-01-09 04:13:21,413 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,413 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,422 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,423 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,425 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,426 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,427 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,429 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 04:13:21,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 04:13:21,432 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 04:13:21,432 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 04:13:21,433 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (1/1) ... [2025-01-09 04:13:21,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:13:21,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:21,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 04:13:21,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 04:13:21,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 04:13:21,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 04:13:21,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 04:13:21,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 04:13:21,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 04:13:21,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 04:13:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-09 04:13:21,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-01-09 04:13:21,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-01-09 04:13:21,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-01-09 04:13:21,495 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_51_0 [2025-01-09 04:13:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_51_0 [2025-01-09 04:13:21,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 04:13:21,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 04:13:21,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 04:13:21,585 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 04:13:21,587 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 04:13:21,853 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2025-01-09 04:13:21,856 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 04:13:21,866 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 04:13:21,866 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 04:13:21,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:13:21 BoogieIcfgContainer [2025-01-09 04:13:21,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 04:13:21,869 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 04:13:21,869 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 04:13:21,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 04:13:21,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:13:21" (1/3) ... [2025-01-09 04:13:21,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0a6559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:13:21, skipping insertion in model container [2025-01-09 04:13:21,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:13:21" (2/3) ... [2025-01-09 04:13:21,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0a6559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:13:21, skipping insertion in model container [2025-01-09 04:13:21,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:13:21" (3/3) ... [2025-01-09 04:13:21,876 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_prod4br-ll.c [2025-01-09 04:13:21,888 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 04:13:21,889 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_prod4br-ll.c that has 3 procedures, 34 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-01-09 04:13:21,940 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 04:13:21,948 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;@412cb2ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 04:13:21,949 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 04:13:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 25 states have (on average 1.48) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:13:21,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 04:13:21,960 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:21,961 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:21,961 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:21,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash 784566562, now seen corresponding path program 1 times [2025-01-09 04:13:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:21,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859543143] [2025-01-09 04:13:21,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:22,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 04:13:22,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 04:13:22,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:22,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:13:22,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:22,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859543143] [2025-01-09 04:13:22,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859543143] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:13:22,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:13:22,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 04:13:22,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304496890] [2025-01-09 04:13:22,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:22,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 04:13:22,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:22,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 04:13:22,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 04:13:22,196 INFO L87 Difference]: Start difference. First operand has 34 states, 25 states have (on average 1.48) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 04:13:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:22,211 INFO L93 Difference]: Finished difference Result 65 states and 95 transitions. [2025-01-09 04:13:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 04:13:22,213 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-01-09 04:13:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:22,217 INFO L225 Difference]: With dead ends: 65 [2025-01-09 04:13:22,219 INFO L226 Difference]: Without dead ends: 30 [2025-01-09 04:13:22,221 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 [2025-01-09 04:13:22,228 INFO L435 NwaCegarLoop]: 44 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, 44 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 [2025-01-09 04:13:22,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 04:13:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-01-09 04:13:22,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-01-09 04:13:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2025-01-09 04:13:22,261 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 11 [2025-01-09 04:13:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:22,262 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2025-01-09 04:13:22,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 04:13:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2025-01-09 04:13:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 04:13:22,264 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:22,264 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:22,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 04:13:22,264 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:22,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1464624932, now seen corresponding path program 1 times [2025-01-09 04:13:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:22,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323869019] [2025-01-09 04:13:22,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:22,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 04:13:22,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 04:13:22,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:22,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:22,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752132314] [2025-01-09 04:13:22,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:22,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:22,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:22,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:22,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 04:13:22,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 04:13:22,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 04:13:22,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:22,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:22,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-01-09 04:13:22,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:22,561 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 15 treesize of output 1 [2025-01-09 04:13:22,565 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 15 treesize of output 1 [2025-01-09 04:13:22,577 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 15 treesize of output 11 [2025-01-09 04:13:22,590 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 [2025-01-09 04:13:22,599 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 [2025-01-09 04:13:22,608 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 15 treesize of output 11 [2025-01-09 04:13:22,775 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 19 treesize of output 11 [2025-01-09 04:13:22,781 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 15 treesize of output 7 [2025-01-09 04:13:22,792 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 19 treesize of output 11 [2025-01-09 04:13:22,797 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 15 treesize of output 7 [2025-01-09 04:13:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:13:22,863 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:13:22,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:22,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323869019] [2025-01-09 04:13:22,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:13:22,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752132314] [2025-01-09 04:13:22,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752132314] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:13:22,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:13:22,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 04:13:22,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369401743] [2025-01-09 04:13:22,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:22,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 04:13:22,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:22,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 04:13:22,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 04:13:22,868 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 04:13:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:23,151 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2025-01-09 04:13:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 04:13:23,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-01-09 04:13:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:23,153 INFO L225 Difference]: With dead ends: 51 [2025-01-09 04:13:23,153 INFO L226 Difference]: Without dead ends: 49 [2025-01-09 04:13:23,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:13:23,154 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:23,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 131 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:13:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-01-09 04:13:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2025-01-09 04:13:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 33 states have internal predecessors, (42), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 04:13:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2025-01-09 04:13:23,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 11 [2025-01-09 04:13:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:23,165 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2025-01-09 04:13:23,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 04:13:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2025-01-09 04:13:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-01-09 04:13:23,166 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:23,166 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:23,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 04:13:23,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:23,366 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:23,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash -667122419, now seen corresponding path program 1 times [2025-01-09 04:13:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831017799] [2025-01-09 04:13:23,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:23,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-09 04:13:23,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-09 04:13:23,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:23,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:13:23,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:23,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831017799] [2025-01-09 04:13:23,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831017799] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:13:23,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:13:23,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 04:13:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216452950] [2025-01-09 04:13:23,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:23,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 04:13:23,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:23,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 04:13:23,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-01-09 04:13:23,899 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:13:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:24,131 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2025-01-09 04:13:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 04:13:24,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2025-01-09 04:13:24,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:24,133 INFO L225 Difference]: With dead ends: 64 [2025-01-09 04:13:24,133 INFO L226 Difference]: Without dead ends: 52 [2025-01-09 04:13:24,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-01-09 04:13:24,134 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:24,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:13:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-01-09 04:13:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2025-01-09 04:13:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 38 states have internal predecessors, (46), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-01-09 04:13:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2025-01-09 04:13:24,153 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 22 [2025-01-09 04:13:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:24,153 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2025-01-09 04:13:24,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:13:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2025-01-09 04:13:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-01-09 04:13:24,154 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:24,154 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:24,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 04:13:24,154 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:24,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:24,155 INFO L85 PathProgramCache]: Analyzing trace with hash 12935951, now seen corresponding path program 1 times [2025-01-09 04:13:24,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:24,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665892031] [2025-01-09 04:13:24,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:24,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:24,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-09 04:13:24,194 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-09 04:13:24,194 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:24,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:24,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648360198] [2025-01-09 04:13:24,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:24,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:24,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:24,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 04:13:24,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-09 04:13:24,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-09 04:13:24,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:24,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:24,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-09 04:13:24,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:24,319 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 [2025-01-09 04:13:24,326 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 15 treesize of output 11 [2025-01-09 04:13:24,357 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 11 treesize of output 7 [2025-01-09 04:13:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:13:24,560 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:13:24,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:24,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665892031] [2025-01-09 04:13:24,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:13:24,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648360198] [2025-01-09 04:13:24,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648360198] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:13:24,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:13:24,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-01-09 04:13:24,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074465977] [2025-01-09 04:13:24,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:24,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 04:13:24,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:24,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 04:13:24,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:13:24,563 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:13:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:24,871 INFO L93 Difference]: Finished difference Result 87 states and 122 transitions. [2025-01-09 04:13:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 04:13:24,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2025-01-09 04:13:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:24,873 INFO L225 Difference]: With dead ends: 87 [2025-01-09 04:13:24,875 INFO L226 Difference]: Without dead ends: 58 [2025-01-09 04:13:24,875 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-01-09 04:13:24,876 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:24,876 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 116 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:13:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-01-09 04:13:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2025-01-09 04:13:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 43 states have internal predecessors, (49), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2025-01-09 04:13:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2025-01-09 04:13:24,891 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 22 [2025-01-09 04:13:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:24,891 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2025-01-09 04:13:24,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:13:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2025-01-09 04:13:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-09 04:13:24,892 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:24,892 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:24,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 04:13:25,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:25,093 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:25,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash -572145724, now seen corresponding path program 1 times [2025-01-09 04:13:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519194308] [2025-01-09 04:13:25,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:25,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:25,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 04:13:25,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 04:13:25,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:25,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:25,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83981702] [2025-01-09 04:13:25,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:25,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:25,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:25,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:25,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 04:13:25,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 04:13:25,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 04:13:25,304 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:25,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:25,311 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 165 conjuncts are in the unsatisfiable core [2025-01-09 04:13:25,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:25,328 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 15 treesize of output 1 [2025-01-09 04:13:25,330 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 15 treesize of output 1 [2025-01-09 04:13:25,339 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 [2025-01-09 04:13:25,343 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 [2025-01-09 04:13:25,349 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 15 treesize of output 11 [2025-01-09 04:13:25,357 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 15 treesize of output 11 [2025-01-09 04:13:25,805 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 38 treesize of output 22 [2025-01-09 04:13:25,819 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 19 treesize of output 11 [2025-01-09 04:13:25,830 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 38 treesize of output 22 [2025-01-09 04:13:26,016 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 30 treesize of output 18 [2025-01-09 04:13:26,022 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 17 treesize of output 9 [2025-01-09 04:13:26,035 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 30 treesize of output 18 [2025-01-09 04:13:26,043 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 17 treesize of output 9 [2025-01-09 04:13:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:13:26,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:13:27,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519194308] [2025-01-09 04:13:27,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:13:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83981702] [2025-01-09 04:13:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83981702] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:13:27,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:13:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2025-01-09 04:13:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507365066] [2025-01-09 04:13:27,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:13:27,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 04:13:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:27,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 04:13:27,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2025-01-09 04:13:27,266 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:13:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:33,941 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2025-01-09 04:13:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-09 04:13:33,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2025-01-09 04:13:33,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:33,943 INFO L225 Difference]: With dead ends: 106 [2025-01-09 04:13:33,943 INFO L226 Difference]: Without dead ends: 102 [2025-01-09 04:13:33,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 04:13:33,945 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:33,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 263 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-01-09 04:13:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-01-09 04:13:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2025-01-09 04:13:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.25) internal successors, (70), 60 states have internal predecessors, (70), 11 states have call successors, (11), 8 states have call predecessors, (11), 11 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2025-01-09 04:13:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2025-01-09 04:13:33,959 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 24 [2025-01-09 04:13:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:33,959 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2025-01-09 04:13:33,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:13:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2025-01-09 04:13:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 04:13:33,960 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:33,960 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:33,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 04:13:34,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:34,161 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:34,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1650254103, now seen corresponding path program 1 times [2025-01-09 04:13:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:34,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790076933] [2025-01-09 04:13:34,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:34,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 04:13:34,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 04:13:34,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:34,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:34,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224690621] [2025-01-09 04:13:34,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:34,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:34,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:34,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:34,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 04:13:34,263 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 04:13:34,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 04:13:34,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:34,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:34,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 04:13:34,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:34,298 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 15 treesize of output 11 [2025-01-09 04:13:34,300 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 15 treesize of output 1 [2025-01-09 04:13:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:13:34,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:34,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:34,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790076933] [2025-01-09 04:13:34,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:13:34,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224690621] [2025-01-09 04:13:34,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224690621] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:34,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:13:34,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 14 [2025-01-09 04:13:34,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501705090] [2025-01-09 04:13:34,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:34,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 04:13:34,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:34,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 04:13:34,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-01-09 04:13:34,535 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 04:13:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:34,670 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2025-01-09 04:13:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 04:13:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2025-01-09 04:13:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:34,672 INFO L225 Difference]: With dead ends: 84 [2025-01-09 04:13:34,672 INFO L226 Difference]: Without dead ends: 69 [2025-01-09 04:13:34,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-01-09 04:13:34,673 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:34,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 155 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:13:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-01-09 04:13:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2025-01-09 04:13:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 51 states have internal predecessors, (60), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2025-01-09 04:13:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2025-01-09 04:13:34,686 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 28 [2025-01-09 04:13:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:34,687 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2025-01-09 04:13:34,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 04:13:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2025-01-09 04:13:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-09 04:13:34,688 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:34,688 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:34,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 04:13:34,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-01-09 04:13:34,889 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:34,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:34,889 INFO L85 PathProgramCache]: Analyzing trace with hash -423181544, now seen corresponding path program 1 times [2025-01-09 04:13:34,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:34,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238695516] [2025-01-09 04:13:34,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:34,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:34,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 04:13:34,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 04:13:34,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:34,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 04:13:36,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:36,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238695516] [2025-01-09 04:13:36,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238695516] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:36,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701941671] [2025-01-09 04:13:36,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:36,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:36,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:36,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 04:13:36,079 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 04:13:36,118 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 04:13:36,118 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:36,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:36,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 04:13:36,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:36,186 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 35 treesize of output 19 [2025-01-09 04:13:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:36,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:36,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701941671] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:13:36,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:13:36,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2025-01-09 04:13:36,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755149971] [2025-01-09 04:13:36,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:13:36,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 04:13:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:36,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 04:13:36,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2025-01-09 04:13:36,496 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 04:13:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:36,812 INFO L93 Difference]: Finished difference Result 90 states and 131 transitions. [2025-01-09 04:13:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 04:13:36,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 37 [2025-01-09 04:13:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:36,814 INFO L225 Difference]: With dead ends: 90 [2025-01-09 04:13:36,814 INFO L226 Difference]: Without dead ends: 72 [2025-01-09 04:13:36,814 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2025-01-09 04:13:36,815 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:36,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 108 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:13:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-01-09 04:13:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2025-01-09 04:13:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 50 states have internal predecessors, (58), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2025-01-09 04:13:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2025-01-09 04:13:36,835 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 37 [2025-01-09 04:13:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:36,835 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2025-01-09 04:13:36,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 04:13:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2025-01-09 04:13:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-09 04:13:36,837 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:36,837 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:36,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 04:13:37,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:37,037 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:37,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash 277883034, now seen corresponding path program 1 times [2025-01-09 04:13:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:37,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599799681] [2025-01-09 04:13:37,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:37,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:37,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 04:13:37,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 04:13:37,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:37,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 04:13:37,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:37,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599799681] [2025-01-09 04:13:37,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599799681] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:37,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116268836] [2025-01-09 04:13:37,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:37,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:37,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:37,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:37,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 04:13:37,932 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 04:13:37,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 04:13:37,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:37,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:37,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-09 04:13:37,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:38,077 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 35 treesize of output 19 [2025-01-09 04:13:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:38,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:38,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116268836] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:13:38,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:13:38,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2025-01-09 04:13:38,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075552660] [2025-01-09 04:13:38,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:13:38,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 04:13:38,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:38,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 04:13:38,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2025-01-09 04:13:38,394 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 04:13:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:38,807 INFO L93 Difference]: Finished difference Result 97 states and 178 transitions. [2025-01-09 04:13:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-09 04:13:38,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 37 [2025-01-09 04:13:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:38,809 INFO L225 Difference]: With dead ends: 97 [2025-01-09 04:13:38,809 INFO L226 Difference]: Without dead ends: 80 [2025-01-09 04:13:38,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2025-01-09 04:13:38,810 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:38,810 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 119 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 04:13:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-01-09 04:13:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2025-01-09 04:13:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 53 states have internal predecessors, (64), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) [2025-01-09 04:13:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2025-01-09 04:13:38,830 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 37 [2025-01-09 04:13:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:38,830 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2025-01-09 04:13:38,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2025-01-09 04:13:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2025-01-09 04:13:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-09 04:13:38,832 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:38,832 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:38,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 04:13:39,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-01-09 04:13:39,036 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:39,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1332434696, now seen corresponding path program 1 times [2025-01-09 04:13:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456051919] [2025-01-09 04:13:39,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:39,052 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:39,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:39,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:39,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:39,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:39,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456051919] [2025-01-09 04:13:39,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456051919] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:39,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258823510] [2025-01-09 04:13:39,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:39,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:39,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:39,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:39,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 04:13:39,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:39,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:39,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:39,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:39,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 04:13:39,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:39,708 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:13:39,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258823510] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:13:39,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:13:39,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2025-01-09 04:13:39,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695836012] [2025-01-09 04:13:39,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:39,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 04:13:39,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:39,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 04:13:39,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-01-09 04:13:39,709 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 04:13:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:39,785 INFO L93 Difference]: Finished difference Result 116 states and 171 transitions. [2025-01-09 04:13:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 04:13:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2025-01-09 04:13:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:39,788 INFO L225 Difference]: With dead ends: 116 [2025-01-09 04:13:39,788 INFO L226 Difference]: Without dead ends: 74 [2025-01-09 04:13:39,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:13:39,789 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:39,789 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 117 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:13:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-01-09 04:13:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2025-01-09 04:13:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 59 states have internal predecessors, (72), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) [2025-01-09 04:13:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2025-01-09 04:13:39,802 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 41 [2025-01-09 04:13:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:39,802 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2025-01-09 04:13:39,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 04:13:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2025-01-09 04:13:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-09 04:13:39,804 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:39,804 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:39,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 04:13:40,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:40,005 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:40,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:40,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1973991240, now seen corresponding path program 1 times [2025-01-09 04:13:40,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:40,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000354588] [2025-01-09 04:13:40,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:40,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:40,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:40,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:40,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:40,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:40,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000354588] [2025-01-09 04:13:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000354588] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990300349] [2025-01-09 04:13:40,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:40,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:40,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:40,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 04:13:40,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:40,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:40,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:40,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:40,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 04:13:40,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:40,647 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:13:40,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990300349] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:13:40,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:13:40,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2025-01-09 04:13:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477748236] [2025-01-09 04:13:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:40,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 04:13:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:40,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 04:13:40,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-01-09 04:13:40,649 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 04:13:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:40,799 INFO L93 Difference]: Finished difference Result 120 states and 174 transitions. [2025-01-09 04:13:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 04:13:40,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2025-01-09 04:13:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:40,800 INFO L225 Difference]: With dead ends: 120 [2025-01-09 04:13:40,800 INFO L226 Difference]: Without dead ends: 71 [2025-01-09 04:13:40,801 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-01-09 04:13:40,801 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:40,801 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 116 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:13:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-01-09 04:13:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2025-01-09 04:13:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 57 states have internal predecessors, (68), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) [2025-01-09 04:13:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2025-01-09 04:13:40,811 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 41 [2025-01-09 04:13:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:40,811 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2025-01-09 04:13:40,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 04:13:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2025-01-09 04:13:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-09 04:13:40,812 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:40,813 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:40,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 04:13:41,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:41,017 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:41,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1198421190, now seen corresponding path program 1 times [2025-01-09 04:13:41,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:41,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012628165] [2025-01-09 04:13:41,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:41,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:41,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:41,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:41,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:41,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:41,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388709083] [2025-01-09 04:13:41,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:41,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:41,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:41,061 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:41,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 04:13:41,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:41,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:41,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:41,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:41,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 113 conjuncts are in the unsatisfiable core [2025-01-09 04:13:41,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:41,205 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 15 treesize of output 1 [2025-01-09 04:13:41,209 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 15 treesize of output 11 [2025-01-09 04:13:41,213 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 [2025-01-09 04:13:41,219 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 [2025-01-09 04:13:41,225 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 15 treesize of output 11 [2025-01-09 04:13:41,246 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 11 treesize of output 7 [2025-01-09 04:13:41,253 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 11 treesize of output 7 [2025-01-09 04:13:42,069 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 27 treesize of output 19 [2025-01-09 04:13:42,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2025-01-09 04:13:42,098 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 19 treesize of output 11 [2025-01-09 04:13:42,104 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 15 treesize of output 7 [2025-01-09 04:13:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:42,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:42,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:42,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012628165] [2025-01-09 04:13:42,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:13:42,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388709083] [2025-01-09 04:13:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388709083] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:42,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:13:42,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-01-09 04:13:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718421870] [2025-01-09 04:13:42,971 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:13:42,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 04:13:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:42,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 04:13:42,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2025-01-09 04:13:42,972 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:43,516 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2025-01-09 04:13:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 04:13:43,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2025-01-09 04:13:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:43,518 INFO L225 Difference]: With dead ends: 82 [2025-01-09 04:13:43,518 INFO L226 Difference]: Without dead ends: 80 [2025-01-09 04:13:43,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2025-01-09 04:13:43,519 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:43,520 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 140 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 04:13:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-01-09 04:13:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2025-01-09 04:13:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.280701754385965) internal successors, (73), 63 states have internal predecessors, (73), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2025-01-09 04:13:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 110 transitions. [2025-01-09 04:13:43,534 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 110 transitions. Word has length 41 [2025-01-09 04:13:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:43,534 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 110 transitions. [2025-01-09 04:13:43,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 110 transitions. [2025-01-09 04:13:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 04:13:43,536 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:43,536 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:43,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 04:13:43,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:43,737 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:43,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1657766048, now seen corresponding path program 1 times [2025-01-09 04:13:43,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:43,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415359008] [2025-01-09 04:13:43,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:43,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 04:13:43,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 04:13:43,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:43,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:43,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882413439] [2025-01-09 04:13:43,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:43,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:43,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:43,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:43,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 04:13:43,865 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 04:13:43,902 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 04:13:43,902 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:43,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:43,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-01-09 04:13:43,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:43,913 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 15 treesize of output 1 [2025-01-09 04:13:43,917 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 15 treesize of output 11 [2025-01-09 04:13:43,924 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 [2025-01-09 04:13:43,930 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 15 treesize of output 11 [2025-01-09 04:13:43,937 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 [2025-01-09 04:13:43,959 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 11 treesize of output 7 [2025-01-09 04:13:43,968 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 11 treesize of output 7 [2025-01-09 04:13:44,497 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 27 treesize of output 19 [2025-01-09 04:13:44,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2025-01-09 04:13:44,518 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 19 treesize of output 11 [2025-01-09 04:13:44,520 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 15 treesize of output 7 [2025-01-09 04:13:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:44,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:45,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415359008] [2025-01-09 04:13:45,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:13:45,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882413439] [2025-01-09 04:13:45,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882413439] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:45,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:13:45,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-01-09 04:13:45,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236522591] [2025-01-09 04:13:45,185 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:13:45,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 04:13:45,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:45,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 04:13:45,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2025-01-09 04:13:45,186 INFO L87 Difference]: Start difference. First operand 79 states and 110 transitions. Second operand has 15 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:45,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:45,856 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2025-01-09 04:13:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-09 04:13:45,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2025-01-09 04:13:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:45,857 INFO L225 Difference]: With dead ends: 91 [2025-01-09 04:13:45,857 INFO L226 Difference]: Without dead ends: 89 [2025-01-09 04:13:45,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2025-01-09 04:13:45,858 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:45,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 170 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 04:13:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-01-09 04:13:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2025-01-09 04:13:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.280701754385965) internal successors, (73), 63 states have internal predecessors, (73), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2025-01-09 04:13:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 110 transitions. [2025-01-09 04:13:45,874 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 110 transitions. Word has length 39 [2025-01-09 04:13:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:45,874 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 110 transitions. [2025-01-09 04:13:45,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 110 transitions. [2025-01-09 04:13:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-09 04:13:45,875 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:45,875 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:45,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 04:13:46,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-09 04:13:46,076 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:46,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1621123016, now seen corresponding path program 1 times [2025-01-09 04:13:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:46,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247288696] [2025-01-09 04:13:46,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:46,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:46,086 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:46,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:46,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:46,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 04:13:46,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:46,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247288696] [2025-01-09 04:13:46,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247288696] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:46,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563330448] [2025-01-09 04:13:46,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:46,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:46,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:46,536 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:46,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 04:13:46,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:46,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:46,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:46,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:46,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-09 04:13:46,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:46,719 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 23 treesize of output 15 [2025-01-09 04:13:46,724 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 15 treesize of output 1 [2025-01-09 04:13:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:47,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:47,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563330448] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:13:47,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 04:13:47,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 23 [2025-01-09 04:13:47,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591211801] [2025-01-09 04:13:47,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 04:13:47,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 04:13:47,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:47,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 04:13:47,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-01-09 04:13:47,366 INFO L87 Difference]: Start difference. First operand 79 states and 110 transitions. Second operand has 23 states, 20 states have (on average 2.8) internal successors, (56), 21 states have internal predecessors, (56), 8 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2025-01-09 04:13:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:48,193 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2025-01-09 04:13:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-01-09 04:13:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.8) internal successors, (56), 21 states have internal predecessors, (56), 8 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2025-01-09 04:13:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:48,196 INFO L225 Difference]: With dead ends: 124 [2025-01-09 04:13:48,196 INFO L226 Difference]: Without dead ends: 112 [2025-01-09 04:13:48,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2025-01-09 04:13:48,197 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:48,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 243 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 04:13:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-01-09 04:13:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2025-01-09 04:13:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 67 states have internal predecessors, (74), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (40), 9 states have call predecessors, (40), 15 states have call successors, (40) [2025-01-09 04:13:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2025-01-09 04:13:48,213 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 41 [2025-01-09 04:13:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:48,214 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2025-01-09 04:13:48,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.8) internal successors, (56), 21 states have internal predecessors, (56), 8 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2025-01-09 04:13:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2025-01-09 04:13:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-09 04:13:48,216 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:48,216 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:48,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-01-09 04:13:48,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-09 04:13:48,421 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:48,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2036030854, now seen corresponding path program 1 times [2025-01-09 04:13:48,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:48,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830330882] [2025-01-09 04:13:48,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:48,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:48,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:48,442 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:48,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:48,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:48,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024538987] [2025-01-09 04:13:48,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:48,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:48,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:48,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 04:13:48,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:48,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:48,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:48,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:48,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-01-09 04:13:48,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:48,638 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 15 treesize of output 1 [2025-01-09 04:13:48,642 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 15 treesize of output 11 [2025-01-09 04:13:48,648 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 [2025-01-09 04:13:48,653 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 [2025-01-09 04:13:48,659 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 15 treesize of output 11 [2025-01-09 04:13:48,677 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 11 treesize of output 7 [2025-01-09 04:13:48,683 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 11 treesize of output 7 [2025-01-09 04:13:49,239 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 27 treesize of output 19 [2025-01-09 04:13:49,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2025-01-09 04:13:49,272 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 19 treesize of output 11 [2025-01-09 04:13:49,274 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 15 treesize of output 7 [2025-01-09 04:13:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:49,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:49,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830330882] [2025-01-09 04:13:49,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:13:49,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024538987] [2025-01-09 04:13:49,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024538987] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:49,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:13:49,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-01-09 04:13:49,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329327831] [2025-01-09 04:13:49,959 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:13:49,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 04:13:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:49,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 04:13:49,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2025-01-09 04:13:49,960 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:50,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:50,643 INFO L93 Difference]: Finished difference Result 97 states and 161 transitions. [2025-01-09 04:13:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 04:13:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2025-01-09 04:13:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:50,646 INFO L225 Difference]: With dead ends: 97 [2025-01-09 04:13:50,646 INFO L226 Difference]: Without dead ends: 95 [2025-01-09 04:13:50,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2025-01-09 04:13:50,647 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:50,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 152 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 04:13:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-01-09 04:13:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2025-01-09 04:13:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 67 states have internal predecessors, (74), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (40), 9 states have call predecessors, (40), 15 states have call successors, (40) [2025-01-09 04:13:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2025-01-09 04:13:50,662 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 41 [2025-01-09 04:13:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:50,663 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2025-01-09 04:13:50,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2025-01-09 04:13:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-09 04:13:50,665 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:50,665 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:50,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-09 04:13:50,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:50,866 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:50,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1557871864, now seen corresponding path program 1 times [2025-01-09 04:13:50,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:50,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673017710] [2025-01-09 04:13:50,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:50,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:50,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:50,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:50,890 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:50,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:50,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564391580] [2025-01-09 04:13:50,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:50,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:50,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:50,894 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:50,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 04:13:50,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:51,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:51,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:51,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:51,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 122 conjuncts are in the unsatisfiable core [2025-01-09 04:13:51,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:51,052 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 15 treesize of output 1 [2025-01-09 04:13:51,058 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 15 treesize of output 11 [2025-01-09 04:13:51,062 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 [2025-01-09 04:13:51,067 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 [2025-01-09 04:13:51,072 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 15 treesize of output 11 [2025-01-09 04:13:51,096 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 11 treesize of output 7 [2025-01-09 04:13:51,099 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 11 treesize of output 7 [2025-01-09 04:13:52,857 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 27 treesize of output 19 [2025-01-09 04:13:52,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2025-01-09 04:13:52,885 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 19 treesize of output 11 [2025-01-09 04:13:52,887 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 15 treesize of output 7 [2025-01-09 04:13:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:52,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:53,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673017710] [2025-01-09 04:13:53,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:13:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564391580] [2025-01-09 04:13:53,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564391580] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:53,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:13:53,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-01-09 04:13:53,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268994637] [2025-01-09 04:13:53,932 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:13:53,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 04:13:53,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:53,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 04:13:53,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2025-01-09 04:13:53,933 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:54,639 INFO L93 Difference]: Finished difference Result 99 states and 170 transitions. [2025-01-09 04:13:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 04:13:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2025-01-09 04:13:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:54,641 INFO L225 Difference]: With dead ends: 99 [2025-01-09 04:13:54,641 INFO L226 Difference]: Without dead ends: 97 [2025-01-09 04:13:54,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2025-01-09 04:13:54,641 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:54,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 178 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 04:13:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-01-09 04:13:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2025-01-09 04:13:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.271186440677966) internal successors, (75), 69 states have internal predecessors, (75), 17 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (45), 9 states have call predecessors, (45), 16 states have call successors, (45) [2025-01-09 04:13:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 137 transitions. [2025-01-09 04:13:54,661 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 137 transitions. Word has length 41 [2025-01-09 04:13:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:54,662 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 137 transitions. [2025-01-09 04:13:54,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:13:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 137 transitions. [2025-01-09 04:13:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-09 04:13:54,664 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:54,664 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:54,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-09 04:13:54,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:54,865 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:54,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1910740088, now seen corresponding path program 1 times [2025-01-09 04:13:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:54,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660506454] [2025-01-09 04:13:54,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:54,876 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:54,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:54,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:54,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 04:13:55,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:55,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660506454] [2025-01-09 04:13:55,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660506454] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:55,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16348880] [2025-01-09 04:13:55,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:55,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:55,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:55,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-09 04:13:55,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:55,408 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:55,408 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:55,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:55,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 04:13:55,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:55,462 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:13:55,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16348880] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:13:55,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:13:55,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2025-01-09 04:13:55,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164655325] [2025-01-09 04:13:55,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:55,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 04:13:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:55,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 04:13:55,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-01-09 04:13:55,463 INFO L87 Difference]: Start difference. First operand 86 states and 137 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 04:13:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:55,531 INFO L93 Difference]: Finished difference Result 145 states and 256 transitions. [2025-01-09 04:13:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 04:13:55,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2025-01-09 04:13:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:55,533 INFO L225 Difference]: With dead ends: 145 [2025-01-09 04:13:55,533 INFO L226 Difference]: Without dead ends: 83 [2025-01-09 04:13:55,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-01-09 04:13:55,534 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:55,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 04:13:55,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-01-09 04:13:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-01-09 04:13:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 66 states have internal predecessors, (71), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (37), 9 states have call predecessors, (37), 14 states have call successors, (37) [2025-01-09 04:13:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2025-01-09 04:13:55,553 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 41 [2025-01-09 04:13:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:55,553 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2025-01-09 04:13:55,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 04:13:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2025-01-09 04:13:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-01-09 04:13:55,554 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:55,555 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:55,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-09 04:13:55,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-01-09 04:13:55,755 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:55,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:55,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1691885370, now seen corresponding path program 1 times [2025-01-09 04:13:55,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:55,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326280122] [2025-01-09 04:13:55,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:55,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:55,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:55,772 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:55,772 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:55,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 04:13:56,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:13:56,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326280122] [2025-01-09 04:13:56,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326280122] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:56,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554631125] [2025-01-09 04:13:56,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:56,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:56,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:56,143 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:56,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-09 04:13:56,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-01-09 04:13:56,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-01-09 04:13:56,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:56,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:56,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-01-09 04:13:56,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:56,313 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 15 treesize of output 11 [2025-01-09 04:13:56,314 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 15 treesize of output 1 [2025-01-09 04:13:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 04:13:56,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:13:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 04:13:56,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554631125] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 04:13:56,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:13:56,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9, 11] total 25 [2025-01-09 04:13:56,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377396038] [2025-01-09 04:13:56,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:13:56,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 04:13:56,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:13:56,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 04:13:56,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2025-01-09 04:13:56,761 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-09 04:13:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:13:57,028 INFO L93 Difference]: Finished difference Result 105 states and 191 transitions. [2025-01-09 04:13:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 04:13:57,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2025-01-09 04:13:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:13:57,030 INFO L225 Difference]: With dead ends: 105 [2025-01-09 04:13:57,030 INFO L226 Difference]: Without dead ends: 91 [2025-01-09 04:13:57,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2025-01-09 04:13:57,031 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:13:57,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 81 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:13:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-01-09 04:13:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2025-01-09 04:13:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 69 states have internal predecessors, (74), 15 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (59), 12 states have call predecessors, (59), 14 states have call successors, (59) [2025-01-09 04:13:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 148 transitions. [2025-01-09 04:13:57,046 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 148 transitions. Word has length 41 [2025-01-09 04:13:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:13:57,047 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 148 transitions. [2025-01-09 04:13:57,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-09 04:13:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 148 transitions. [2025-01-09 04:13:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-01-09 04:13:57,048 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:13:57,048 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:13:57,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 04:13:57,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 04:13:57,249 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:13:57,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:13:57,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1044251861, now seen corresponding path program 1 times [2025-01-09 04:13:57,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:13:57,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958129536] [2025-01-09 04:13:57,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:57,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:13:57,261 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 04:13:57,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 04:13:57,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:57,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:13:57,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353254969] [2025-01-09 04:13:57,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:13:57,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:13:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:13:57,280 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:13:57,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-09 04:13:57,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 04:13:57,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 04:13:57,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:13:57,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:13:57,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 184 conjuncts are in the unsatisfiable core [2025-01-09 04:13:57,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:13:57,466 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 15 treesize of output 1 [2025-01-09 04:13:57,470 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 [2025-01-09 04:13:57,473 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 15 treesize of output 11 [2025-01-09 04:13:57,478 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 [2025-01-09 04:13:57,483 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 15 treesize of output 11 [2025-01-09 04:13:57,499 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 11 treesize of output 7 [2025-01-09 04:13:57,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:13:58,957 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 40 treesize of output 28 [2025-01-09 04:13:58,961 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 27 treesize of output 19 [2025-01-09 04:13:58,970 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 30 treesize of output 18 [2025-01-09 04:13:59,054 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 23 treesize of output 15 [2025-01-09 04:13:59,057 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 16 [2025-01-09 04:13:59,065 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 26 treesize of output 14 [2025-01-09 04:13:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 04:13:59,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:01,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:01,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958129536] [2025-01-09 04:14:01,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:14:01,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353254969] [2025-01-09 04:14:01,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353254969] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:01,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:14:01,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2025-01-09 04:14:01,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060764099] [2025-01-09 04:14:01,900 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:01,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 04:14:01,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:01,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 04:14:01,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2025-01-09 04:14:01,901 INFO L87 Difference]: Start difference. First operand 89 states and 148 transitions. Second operand has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:14:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:03,064 INFO L93 Difference]: Finished difference Result 102 states and 176 transitions. [2025-01-09 04:14:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 04:14:03,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2025-01-09 04:14:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:03,066 INFO L225 Difference]: With dead ends: 102 [2025-01-09 04:14:03,066 INFO L226 Difference]: Without dead ends: 100 [2025-01-09 04:14:03,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2025-01-09 04:14:03,067 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:03,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 180 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-01-09 04:14:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-01-09 04:14:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2025-01-09 04:14:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 70 states have internal predecessors, (75), 15 states have call successors, (15), 7 states have call predecessors, (15), 13 states have return successors, (67), 13 states have call predecessors, (67), 14 states have call successors, (67) [2025-01-09 04:14:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 157 transitions. [2025-01-09 04:14:03,085 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 157 transitions. Word has length 54 [2025-01-09 04:14:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:03,085 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 157 transitions. [2025-01-09 04:14:03,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:14:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 157 transitions. [2025-01-09 04:14:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-01-09 04:14:03,087 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:03,087 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:03,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-09 04:14:03,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 04:14:03,288 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:03,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash -514402863, now seen corresponding path program 1 times [2025-01-09 04:14:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:03,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124424877] [2025-01-09 04:14:03,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:03,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:03,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-01-09 04:14:03,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 04:14:03,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:03,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:14:03,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774487845] [2025-01-09 04:14:03,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:03,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:03,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:03,347 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:14:03,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-09 04:14:03,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-01-09 04:14:03,567 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 04:14:03,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:03,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:03,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 149 conjuncts are in the unsatisfiable core [2025-01-09 04:14:03,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:03,576 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 15 treesize of output 1 [2025-01-09 04:14:03,578 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 15 treesize of output 11 [2025-01-09 04:14:03,582 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 [2025-01-09 04:14:03,586 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 15 treesize of output 11 [2025-01-09 04:14:03,591 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 [2025-01-09 04:14:03,603 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 11 treesize of output 7 [2025-01-09 04:14:03,608 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 11 treesize of output 7 [2025-01-09 04:14:04,654 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 40 treesize of output 28 [2025-01-09 04:14:04,657 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 27 treesize of output 19 [2025-01-09 04:14:04,666 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 30 treesize of output 18 [2025-01-09 04:14:04,704 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 26 treesize of output 14 [2025-01-09 04:14:04,709 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 32 treesize of output 20 [2025-01-09 04:14:04,711 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 19 treesize of output 11 [2025-01-09 04:14:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-01-09 04:14:04,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:07,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:07,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124424877] [2025-01-09 04:14:07,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:14:07,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774487845] [2025-01-09 04:14:07,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774487845] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:07,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:14:07,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-01-09 04:14:07,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174667785] [2025-01-09 04:14:07,119 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:07,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 04:14:07,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:07,119 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 04:14:07,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2025-01-09 04:14:07,120 INFO L87 Difference]: Start difference. First operand 91 states and 157 transitions. Second operand has 20 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:14:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:07,994 INFO L93 Difference]: Finished difference Result 104 states and 186 transitions. [2025-01-09 04:14:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 04:14:07,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2025-01-09 04:14:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:07,996 INFO L225 Difference]: With dead ends: 104 [2025-01-09 04:14:07,996 INFO L226 Difference]: Without dead ends: 102 [2025-01-09 04:14:07,996 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2025-01-09 04:14:07,997 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:07,997 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 173 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 04:14:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-01-09 04:14:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2025-01-09 04:14:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 71 states have internal predecessors, (76), 15 states have call successors, (15), 7 states have call predecessors, (15), 14 states have return successors, (76), 14 states have call predecessors, (76), 14 states have call successors, (76) [2025-01-09 04:14:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 167 transitions. [2025-01-09 04:14:08,015 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 167 transitions. Word has length 56 [2025-01-09 04:14:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:08,015 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 167 transitions. [2025-01-09 04:14:08,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:14:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 167 transitions. [2025-01-09 04:14:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-01-09 04:14:08,017 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:08,017 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:08,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-09 04:14:08,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:08,218 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:08,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash 682793875, now seen corresponding path program 1 times [2025-01-09 04:14:08,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:08,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401733344] [2025-01-09 04:14:08,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:08,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-01-09 04:14:08,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 04:14:08,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:08,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:14:08,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624449347] [2025-01-09 04:14:08,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:08,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:08,267 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:14:08,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-09 04:14:08,423 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-01-09 04:14:08,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 04:14:08,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:08,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:08,597 WARN L254 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 225 conjuncts are in the unsatisfiable core [2025-01-09 04:14:08,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:08,613 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 15 treesize of output 1 [2025-01-09 04:14:08,621 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 15 treesize of output 1 [2025-01-09 04:14:08,636 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 [2025-01-09 04:14:08,641 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 15 treesize of output 11 [2025-01-09 04:14:08,648 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 15 treesize of output 11 [2025-01-09 04:14:08,655 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 [2025-01-09 04:14:08,675 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 11 treesize of output 7 [2025-01-09 04:14:08,681 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 11 treesize of output 7 [2025-01-09 04:14:10,881 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 30 treesize of output 18 [2025-01-09 04:14:10,891 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 52 treesize of output 36 [2025-01-09 04:14:10,900 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 27 treesize of output 19 [2025-01-09 04:14:10,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:14:10,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2025-01-09 04:14:10,983 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 19 treesize of output 11 [2025-01-09 04:14:10,990 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 26 treesize of output 14 [2025-01-09 04:14:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 04:14:11,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:19,467 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 74 treesize of output 70 [2025-01-09 04:14:19,472 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 58 [2025-01-09 04:14:19,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2025-01-09 04:14:19,483 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 54 treesize of output 46 [2025-01-09 04:14:20,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:20,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401733344] [2025-01-09 04:14:20,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:14:20,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624449347] [2025-01-09 04:14:20,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624449347] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:20,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:14:20,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2025-01-09 04:14:20,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161275184] [2025-01-09 04:14:20,216 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:20,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 04:14:20,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:20,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 04:14:20,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=977, Unknown=1, NotChecked=0, Total=1122 [2025-01-09 04:14:20,217 INFO L87 Difference]: Start difference. First operand 93 states and 167 transitions. Second operand has 27 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:14:24,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 04:14:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:14:26,450 INFO L93 Difference]: Finished difference Result 165 states and 331 transitions. [2025-01-09 04:14:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 04:14:26,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2025-01-09 04:14:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:14:26,452 INFO L225 Difference]: With dead ends: 165 [2025-01-09 04:14:26,452 INFO L226 Difference]: Without dead ends: 102 [2025-01-09 04:14:26,453 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=230, Invalid=1575, Unknown=1, NotChecked=0, Total=1806 [2025-01-09 04:14:26,453 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2025-01-09 04:14:26,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 143 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 798 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2025-01-09 04:14:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-01-09 04:14:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2025-01-09 04:14:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.180327868852459) internal successors, (72), 68 states have internal predecessors, (72), 14 states have call successors, (14), 7 states have call predecessors, (14), 13 states have return successors, (61), 13 states have call predecessors, (61), 13 states have call successors, (61) [2025-01-09 04:14:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 147 transitions. [2025-01-09 04:14:26,481 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 147 transitions. Word has length 56 [2025-01-09 04:14:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:14:26,481 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 147 transitions. [2025-01-09 04:14:26,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:14:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 147 transitions. [2025-01-09 04:14:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-01-09 04:14:26,482 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:14:26,482 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:14:26,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-09 04:14:26,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:26,687 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:14:26,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:14:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1269599889, now seen corresponding path program 1 times [2025-01-09 04:14:26,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:14:26,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190233100] [2025-01-09 04:14:26,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:26,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:14:26,697 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-01-09 04:14:26,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 04:14:26,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:26,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:14:26,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257665545] [2025-01-09 04:14:26,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:14:26,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:14:26,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:14:26,720 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 04:14:26,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-01-09 04:14:26,885 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-01-09 04:14:26,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 04:14:26,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:14:26,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:14:26,975 WARN L254 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 234 conjuncts are in the unsatisfiable core [2025-01-09 04:14:26,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:14:26,985 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 15 treesize of output 1 [2025-01-09 04:14:26,987 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 15 treesize of output 1 [2025-01-09 04:14:26,990 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 [2025-01-09 04:14:26,993 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 15 treesize of output 11 [2025-01-09 04:14:26,997 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 [2025-01-09 04:14:27,003 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 15 treesize of output 11 [2025-01-09 04:14:27,015 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 11 treesize of output 7 [2025-01-09 04:14:27,020 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 11 treesize of output 7 [2025-01-09 04:14:29,334 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 30 treesize of output 18 [2025-01-09 04:14:29,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2025-01-09 04:14:29,358 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 13 [2025-01-09 04:14:29,448 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 43 treesize of output 27 [2025-01-09 04:14:29,452 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 30 treesize of output 18 [2025-01-09 04:14:29,456 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 30 treesize of output 18 [2025-01-09 04:14:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 04:14:29,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:14:44,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:14:44,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190233100] [2025-01-09 04:14:44,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:14:44,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257665545] [2025-01-09 04:14:44,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257665545] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:14:44,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:14:44,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2025-01-09 04:14:44,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572173648] [2025-01-09 04:14:44,684 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:14:44,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 04:14:44,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:14:44,685 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 04:14:44,685 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 04:14:44,685 INFO L87 Difference]: Start difference. First operand 89 states and 147 transitions. Second operand has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)