./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i --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_divbin2.i -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 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 04:11:05,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 04:11:05,835 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 04:11:05,838 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 04:11:05,839 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 04:11:05,856 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 04:11:05,857 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 04:11:05,857 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 04:11:05,858 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 04:11:05,858 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 04:11:05,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 04:11:05,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 04:11:05,858 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 04:11:05,858 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 04:11:05,859 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 04:11:05,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 04:11:05,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 04:11:05,859 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 04:11:05,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 04:11:05,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 04:11:05,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 04:11:05,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 04:11:05,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 04:11:05,860 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 04:11:05,860 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 04:11:05,860 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 04:11:05,860 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 04:11:05,861 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:11:05,861 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 04:11:05,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:11:05,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 04:11:05,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 04:11:05,862 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 -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f [2025-01-09 04:11:06,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 04:11:06,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 04:11:06,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 04:11:06,088 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 04:11:06,088 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 04:11:06,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2025-01-09 04:11:07,289 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/73ed3e3ff/e4eab2c733454d1694ac7a2f824e1318/FLAG33debbd63 [2025-01-09 04:11:07,539 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 04:11:07,539 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2025-01-09 04:11:07,549 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/73ed3e3ff/e4eab2c733454d1694ac7a2f824e1318/FLAG33debbd63 [2025-01-09 04:11:07,567 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/73ed3e3ff/e4eab2c733454d1694ac7a2f824e1318 [2025-01-09 04:11:07,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 04:11:07,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 04:11:07,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 04:11:07,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 04:11:07,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 04:11:07,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1efd54e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07, skipping insertion in model container [2025-01-09 04:11:07,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,590 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 04:11:07,705 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_divbin2.i[1567,1580] [2025-01-09 04:11:07,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:11:07,732 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 04:11:07,742 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_divbin2.i[1567,1580] [2025-01-09 04:11:07,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 04:11:07,763 INFO L204 MainTranslator]: Completed translation [2025-01-09 04:11:07,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07 WrapperNode [2025-01-09 04:11:07,766 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 04:11:07,767 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 04:11:07,767 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 04:11:07,767 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 04:11:07,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,777 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,792 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2025-01-09 04:11:07,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 04:11:07,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 04:11:07,792 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 04:11:07,792 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 04:11:07,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,800 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,808 INFO L175 MemorySlicer]: Split 34 memory accesses to 6 slices as follows [2, 7, 11, 7, 4, 3]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 2, 3, 3, 1, 1]. [2025-01-09 04:11:07,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,813 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,816 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,818 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 04:11:07,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 04:11:07,818 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 04:11:07,818 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 04:11:07,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (1/1) ... [2025-01-09 04:11:07,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 04:11:07,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:07,842 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 04:11:07,844 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 04:11:07,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 04:11:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2025-01-09 04:11:07,866 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2025-01-09 04:11:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 04:11:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 04:11:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 04:11:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-09 04:11:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-01-09 04:11:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-01-09 04:11:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 04:11:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 04:11:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 04:11:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 04:11:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-09 04:11:07,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-01-09 04:11:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-01-09 04:11:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2025-01-09 04:11:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2025-01-09 04:11:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 04:11:07,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 04:11:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 04:11:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 04:11:07,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 04:11:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-09 04:11:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-01-09 04:11:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-01-09 04:11:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 04:11:07,869 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 04:11:07,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 04:11:07,936 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 04:11:07,937 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 04:11:08,116 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-01-09 04:11:08,117 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 04:11:08,125 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 04:11:08,126 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-01-09 04:11:08,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:11:08 BoogieIcfgContainer [2025-01-09 04:11:08,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 04:11:08,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 04:11:08,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 04:11:08,132 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 04:11:08,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:11:07" (1/3) ... [2025-01-09 04:11:08,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14001f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:11:08, skipping insertion in model container [2025-01-09 04:11:08,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:11:07" (2/3) ... [2025-01-09 04:11:08,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14001f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:11:08, skipping insertion in model container [2025-01-09 04:11:08,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:11:08" (3/3) ... [2025-01-09 04:11:08,135 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2025-01-09 04:11:08,145 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 04:11:08,147 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_divbin2.i that has 4 procedures, 31 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-01-09 04:11:08,186 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 04:11:08,197 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;@34652f5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 04:11:08,197 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 04:11:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 04:11:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-09 04:11:08,204 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:08,204 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:11:08,205 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:08,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash 536553344, now seen corresponding path program 1 times [2025-01-09 04:11:08,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:08,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187174624] [2025-01-09 04:11:08,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:08,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:08,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 04:11:08,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 04:11:08,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:08,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:08,333 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 04:11:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:08,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187174624] [2025-01-09 04:11:08,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187174624] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:11:08,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:11:08,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 04:11:08,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667550854] [2025-01-09 04:11:08,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:11:08,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 04:11:08,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:08,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 04:11:08,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 04:11:08,366 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:11:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:08,377 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2025-01-09 04:11:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 04:11:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2025-01-09 04:11:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:08,382 INFO L225 Difference]: With dead ends: 55 [2025-01-09 04:11:08,383 INFO L226 Difference]: Without dead ends: 27 [2025-01-09 04:11:08,385 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 04:11:08,387 INFO L435 NwaCegarLoop]: 36 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, 36 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 04:11:08,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 04:11:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-01-09 04:11:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-01-09 04:11:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:11:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2025-01-09 04:11:08,409 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2025-01-09 04:11:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:08,410 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2025-01-09 04:11:08,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:11:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2025-01-09 04:11:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-09 04:11:08,411 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:08,411 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:11:08,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 04:11:08,411 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:08,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1537066275, now seen corresponding path program 1 times [2025-01-09 04:11:08,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:08,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028426275] [2025-01-09 04:11:08,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:08,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:08,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 04:11:08,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 04:11:08,478 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:08,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:08,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146414972] [2025-01-09 04:11:08,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:08,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:08,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:08,494 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 04:11:08,497 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 04:11:08,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 04:11:08,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 04:11:08,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:08,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:08,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-01-09 04:11:08,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:08,670 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 04:11:08,680 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 04:11:08,687 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 04:11:08,851 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 04:11:08,854 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 04:11:08,888 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 04:11:08,888 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 04:11:08,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:08,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028426275] [2025-01-09 04:11:08,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:11:08,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146414972] [2025-01-09 04:11:08,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146414972] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:11:08,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:11:08,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-01-09 04:11:08,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624147751] [2025-01-09 04:11:08,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:11:08,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 04:11:08,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:08,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 04:11:08,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-01-09 04:11:08,890 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:11:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:09,062 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2025-01-09 04:11:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 04:11:09,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-01-09 04:11:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:09,065 INFO L225 Difference]: With dead ends: 55 [2025-01-09 04:11:09,065 INFO L226 Difference]: Without dead ends: 51 [2025-01-09 04:11:09,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-01-09 04:11:09,065 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:09,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 129 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:11:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-01-09 04:11:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2025-01-09 04:11:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2025-01-09 04:11:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2025-01-09 04:11:09,074 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 15 [2025-01-09 04:11:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:09,074 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2025-01-09 04:11:09,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 04:11:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2025-01-09 04:11:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 04:11:09,075 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:09,075 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, 1, 1, 1] [2025-01-09 04:11:09,084 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 04:11:09,275 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 04:11:09,276 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:09,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash -53331565, now seen corresponding path program 1 times [2025-01-09 04:11:09,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:09,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255563802] [2025-01-09 04:11:09,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:09,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:09,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 04:11:09,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 04:11:09,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:09,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:09,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500133495] [2025-01-09 04:11:09,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:09,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:09,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:09,381 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 04:11:09,383 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 04:11:09,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 04:11:09,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 04:11:09,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:09,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:09,506 WARN L254 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 101 conjuncts are in the unsatisfiable core [2025-01-09 04:11:09,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:09,529 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 04:11:09,533 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 04:11:09,539 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 04:11:09,543 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 04:11:09,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:11:09,756 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 32 treesize of output 32 [2025-01-09 04:11:10,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:11:10,172 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 39 treesize of output 35 [2025-01-09 04:11:10,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:11:10,180 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 44 treesize of output 36 [2025-01-09 04:11:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:11:10,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:11:11,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:11,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255563802] [2025-01-09 04:11:11,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:11:11,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500133495] [2025-01-09 04:11:11,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500133495] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 04:11:11,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:11:11,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 25 [2025-01-09 04:11:11,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996340165] [2025-01-09 04:11:11,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:11:11,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 04:11:11,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:11,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 04:11:11,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2025-01-09 04:11:11,175 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 25 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 04:11:14,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2025-01-09 04:11:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:15,255 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2025-01-09 04:11:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-01-09 04:11:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2025-01-09 04:11:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:15,257 INFO L225 Difference]: With dead ends: 123 [2025-01-09 04:11:15,257 INFO L226 Difference]: Without dead ends: 109 [2025-01-09 04:11:15,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2025-01-09 04:11:15,258 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:15,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 165 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 457 Invalid, 2 Unknown, 0 Unchecked, 2.8s Time] [2025-01-09 04:11:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-01-09 04:11:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2025-01-09 04:11:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 70 states have internal predecessors, (77), 17 states have call successors, (17), 13 states have call predecessors, (17), 17 states have return successors, (27), 17 states have call predecessors, (27), 14 states have call successors, (27) [2025-01-09 04:11:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2025-01-09 04:11:15,275 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 25 [2025-01-09 04:11:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:15,275 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2025-01-09 04:11:15,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 04:11:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2025-01-09 04:11:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-09 04:11:15,276 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:15,276 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, 1, 1] [2025-01-09 04:11:15,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 04:11:15,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:15,481 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:15,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1156047171, now seen corresponding path program 1 times [2025-01-09 04:11:15,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:15,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812927109] [2025-01-09 04:11:15,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:15,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:15,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-09 04:11:15,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 04:11:15,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:15,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 04:11:16,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:16,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812927109] [2025-01-09 04:11:16,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812927109] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 04:11:16,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 04:11:16,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-09 04:11:16,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439157828] [2025-01-09 04:11:16,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 04:11:16,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 04:11:16,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:16,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 04:11:16,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-01-09 04:11:16,020 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:11:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:16,172 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2025-01-09 04:11:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 04:11:16,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2025-01-09 04:11:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:16,173 INFO L225 Difference]: With dead ends: 108 [2025-01-09 04:11:16,173 INFO L226 Difference]: Without dead ends: 53 [2025-01-09 04:11:16,173 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-01-09 04:11:16,174 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:16,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 04:11:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-01-09 04:11:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-01-09 04:11:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2025-01-09 04:11:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2025-01-09 04:11:16,189 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 26 [2025-01-09 04:11:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:16,189 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2025-01-09 04:11:16,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 04:11:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2025-01-09 04:11:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-09 04:11:16,190 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:16,190 INFO L218 NwaCegarLoop]: trace histogram [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 04:11:16,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 04:11:16,191 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:16,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash 203160982, now seen corresponding path program 1 times [2025-01-09 04:11:16,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:16,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175608773] [2025-01-09 04:11:16,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:16,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:16,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 04:11:16,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 04:11:16,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:16,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:16,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220039622] [2025-01-09 04:11:16,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:16,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:16,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:16,247 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 04:11:16,248 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 04:11:16,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-09 04:11:16,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 04:11:16,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:16,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:16,374 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 173 conjuncts are in the unsatisfiable core [2025-01-09 04:11:16,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:16,386 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 04:11:16,389 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 04:11:16,391 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 04:11:16,395 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 04:11:16,570 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 04:11:16,761 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 04:11:17,095 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 04:11:17,111 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2025-01-09 04:11:17,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2025-01-09 04:11:17,167 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2025-01-09 04:11:17,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2025-01-09 04:11:17,197 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2025-01-09 04:11:17,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2025-01-09 04:11:17,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:11:17,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 177 [2025-01-09 04:11:17,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:11:17,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 108 [2025-01-09 04:11:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 04:11:17,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:32,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:32,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175608773] [2025-01-09 04:11:32,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:11:32,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220039622] [2025-01-09 04:11:32,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220039622] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:32,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:11:32,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-01-09 04:11:32,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888507913] [2025-01-09 04:11:32,224 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:11:32,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 04:11:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:32,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 04:11:32,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=731, Unknown=3, NotChecked=0, Total=812 [2025-01-09 04:11:32,226 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 04:11:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:41,856 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2025-01-09 04:11:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 04:11:41,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2025-01-09 04:11:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:41,857 INFO L225 Difference]: With dead ends: 96 [2025-01-09 04:11:41,857 INFO L226 Difference]: Without dead ends: 92 [2025-01-09 04:11:41,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=130, Invalid=1197, Unknown=5, NotChecked=0, Total=1332 [2025-01-09 04:11:41,858 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:41,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 219 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 506 Invalid, 2 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 04:11:41,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-01-09 04:11:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2025-01-09 04:11:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.150943396226415) internal successors, (61), 55 states have internal predecessors, (61), 13 states have call successors, (13), 11 states have call predecessors, (13), 13 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2025-01-09 04:11:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2025-01-09 04:11:41,872 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 32 [2025-01-09 04:11:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:41,872 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2025-01-09 04:11:41,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 04:11:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2025-01-09 04:11:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-01-09 04:11:41,873 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:41,873 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:11:41,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 04:11:42,073 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 04:11:42,074 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:42,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:42,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1185146577, now seen corresponding path program 2 times [2025-01-09 04:11:42,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:42,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630794904] [2025-01-09 04:11:42,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:11:42,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:42,092 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-01-09 04:11:42,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 04:11:42,132 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:11:42,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:42,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573932199] [2025-01-09 04:11:42,133 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:11:42,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:42,141 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 04:11:42,143 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 04:11:42,191 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-01-09 04:11:42,265 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 04:11:42,265 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:11:42,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:42,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 125 conjuncts are in the unsatisfiable core [2025-01-09 04:11:42,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:42,275 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 04:11:42,278 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 04:11:42,283 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 04:11:42,504 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 04:11:42,507 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 04:11:42,514 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 04:11:42,518 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 21 [2025-01-09 04:11:42,560 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 25 treesize of output 17 [2025-01-09 04:11:42,563 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 21 treesize of output 13 [2025-01-09 04:11:42,566 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 04:11:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 04:11:42,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:43,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:43,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630794904] [2025-01-09 04:11:43,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:11:43,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573932199] [2025-01-09 04:11:43,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573932199] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:43,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:11:43,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2025-01-09 04:11:43,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687607021] [2025-01-09 04:11:43,314 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:11:43,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 04:11:43,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:43,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 04:11:43,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2025-01-09 04:11:43,315 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:11:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:43,619 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2025-01-09 04:11:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-09 04:11:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2025-01-09 04:11:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:43,620 INFO L225 Difference]: With dead ends: 100 [2025-01-09 04:11:43,620 INFO L226 Difference]: Without dead ends: 98 [2025-01-09 04:11:43,621 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-01-09 04:11:43,621 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:43,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 194 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 04:11:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-01-09 04:11:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2025-01-09 04:11:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 65 states have internal predecessors, (71), 15 states have call successors, (15), 13 states have call predecessors, (15), 16 states have return successors, (26), 15 states have call predecessors, (26), 13 states have call successors, (26) [2025-01-09 04:11:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2025-01-09 04:11:43,637 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 38 [2025-01-09 04:11:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:43,638 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2025-01-09 04:11:43,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-01-09 04:11:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2025-01-09 04:11:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-09 04:11:43,641 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:43,642 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:11:43,647 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 04:11:43,842 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 04:11:43,843 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:43,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1129900046, now seen corresponding path program 1 times [2025-01-09 04:11:43,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:43,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216931314] [2025-01-09 04:11:43,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:43,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:43,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-09 04:11:43,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 04:11:43,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:43,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-09 04:11:44,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:44,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216931314] [2025-01-09 04:11:44,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216931314] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:44,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832051237] [2025-01-09 04:11:44,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:11:44,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:44,877 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 04:11:44,882 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 04:11:44,936 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-09 04:11:44,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 04:11:44,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:11:44,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:44,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 102 conjuncts are in the unsatisfiable core [2025-01-09 04:11:44,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:44,995 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 04:11:45,002 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 04:11:45,004 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 04:11:45,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 04:11:45,183 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 04:11:45,261 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 04:11:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-09 04:11:45,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:46,491 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 04:11:47,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832051237] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:47,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:11:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 30 [2025-01-09 04:11:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441457917] [2025-01-09 04:11:47,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:11:47,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-09 04:11:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:47,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-09 04:11:47,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2025-01-09 04:11:47,202 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 30 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-01-09 04:11:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:48,496 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2025-01-09 04:11:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 04:11:48,496 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) Word has length 44 [2025-01-09 04:11:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:48,498 INFO L225 Difference]: With dead ends: 111 [2025-01-09 04:11:48,498 INFO L226 Difference]: Without dead ends: 99 [2025-01-09 04:11:48,498 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=321, Invalid=2541, Unknown=0, NotChecked=0, Total=2862 [2025-01-09 04:11:48,499 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:48,499 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 83 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 04:11:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-01-09 04:11:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2025-01-09 04:11:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.140625) internal successors, (73), 68 states have internal predecessors, (73), 16 states have call successors, (16), 13 states have call predecessors, (16), 18 states have return successors, (37), 17 states have call predecessors, (37), 14 states have call successors, (37) [2025-01-09 04:11:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2025-01-09 04:11:48,517 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 44 [2025-01-09 04:11:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:48,517 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2025-01-09 04:11:48,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-01-09 04:11:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2025-01-09 04:11:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-09 04:11:48,518 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:48,518 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:11:48,525 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 04:11:48,721 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 04:11:48,722 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:48,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1855415847, now seen corresponding path program 2 times [2025-01-09 04:11:48,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703695403] [2025-01-09 04:11:48,723 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:11:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:48,736 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-09 04:11:48,776 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 04:11:48,777 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:11:48,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 04:11:49,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703695403] [2025-01-09 04:11:49,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703695403] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746161981] [2025-01-09 04:11:49,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 04:11:49,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:49,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:49,661 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 04:11:49,663 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 04:11:49,715 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-09 04:11:49,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 04:11:49,755 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 04:11:49,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:49,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 137 conjuncts are in the unsatisfiable core [2025-01-09 04:11:49,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:49,767 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 04:11:49,771 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 04:11:49,777 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 04:11:49,925 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 04:11:50,069 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 7 treesize of output 3 [2025-01-09 04:11:50,277 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 04:11:50,683 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 33 treesize of output 25 [2025-01-09 04:11:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 04:11:50,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:51,918 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 04:11:52,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746161981] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:52,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:11:52,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 35 [2025-01-09 04:11:52,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611751700] [2025-01-09 04:11:52,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:11:52,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-09 04:11:52,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:52,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-09 04:11:52,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2025-01-09 04:11:52,936 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 35 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2025-01-09 04:11:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:54,976 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2025-01-09 04:11:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-01-09 04:11:54,977 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 50 [2025-01-09 04:11:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:54,978 INFO L225 Difference]: With dead ends: 101 [2025-01-09 04:11:54,978 INFO L226 Difference]: Without dead ends: 91 [2025-01-09 04:11:54,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=455, Invalid=3205, Unknown=0, NotChecked=0, Total=3660 [2025-01-09 04:11:54,979 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:54,979 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 88 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-01-09 04:11:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-01-09 04:11:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2025-01-09 04:11:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 15 states have call successors, (15), 12 states have call predecessors, (15), 16 states have return successors, (34), 15 states have call predecessors, (34), 14 states have call successors, (34) [2025-01-09 04:11:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2025-01-09 04:11:55,012 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 50 [2025-01-09 04:11:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:55,012 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2025-01-09 04:11:55,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2025-01-09 04:11:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2025-01-09 04:11:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-01-09 04:11:55,016 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:55,016 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:11:55,024 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 04:11:55,217 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 04:11:55,217 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:55,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:55,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1536057756, now seen corresponding path program 3 times [2025-01-09 04:11:55,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:55,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475748] [2025-01-09 04:11:55,218 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:11:55,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:55,230 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 3 equivalence classes. [2025-01-09 04:11:55,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 04:11:55,272 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 04:11:55,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-09 04:11:55,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:11:55,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475748] [2025-01-09 04:11:55,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475748] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:55,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172564041] [2025-01-09 04:11:55,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 04:11:55,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:55,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:55,961 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 04:11:55,963 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 04:11:56,024 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 3 equivalence classes. [2025-01-09 04:11:56,181 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 04:11:56,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-01-09 04:11:56,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:56,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 151 conjuncts are in the unsatisfiable core [2025-01-09 04:11:56,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:56,197 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 04:11:56,202 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 04:11:56,206 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 04:11:56,488 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 04:11:56,795 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 04:11:56,859 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 15 [2025-01-09 04:11:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 04:11:57,172 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:11:58,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172564041] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:11:58,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 04:11:58,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2025-01-09 04:11:58,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474396397] [2025-01-09 04:11:58,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 04:11:58,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-09 04:11:58,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:11:58,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-09 04:11:58,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1358, Unknown=0, NotChecked=0, Total=1482 [2025-01-09 04:11:58,103 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 29 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-09 04:11:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:11:59,266 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2025-01-09 04:11:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-09 04:11:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 43 [2025-01-09 04:11:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:11:59,268 INFO L225 Difference]: With dead ends: 158 [2025-01-09 04:11:59,268 INFO L226 Difference]: Without dead ends: 97 [2025-01-09 04:11:59,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2025-01-09 04:11:59,269 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 04:11:59,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 125 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 04:11:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-01-09 04:11:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2025-01-09 04:11:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.098360655737705) internal successors, (67), 64 states have internal predecessors, (67), 16 states have call successors, (16), 13 states have call predecessors, (16), 15 states have return successors, (25), 15 states have call predecessors, (25), 14 states have call successors, (25) [2025-01-09 04:11:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2025-01-09 04:11:59,285 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 43 [2025-01-09 04:11:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:11:59,286 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2025-01-09 04:11:59,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-09 04:11:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2025-01-09 04:11:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-01-09 04:11:59,287 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:11:59,287 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:11:59,296 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 04:11:59,491 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 04:11:59,491 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:11:59,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:11:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2066843349, now seen corresponding path program 4 times [2025-01-09 04:11:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:11:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973172149] [2025-01-09 04:11:59,492 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:11:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:11:59,501 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-01-09 04:11:59,564 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-09 04:11:59,564 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 04:11:59,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:11:59,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717034561] [2025-01-09 04:11:59,566 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 04:11:59,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:11:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:11:59,569 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 04:11:59,570 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 04:11:59,637 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-01-09 04:11:59,770 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-09 04:11:59,770 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 04:11:59,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:11:59,774 WARN L254 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 270 conjuncts are in the unsatisfiable core [2025-01-09 04:11:59,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:11:59,787 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 04:11:59,791 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 04:11:59,799 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 04:11:59,807 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 04:11:59,810 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 04:12:00,053 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 04:12:00,307 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 04:12:00,873 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 04:12:00,890 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2025-01-09 04:12:00,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2025-01-09 04:12:00,982 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2025-01-09 04:12:00,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 53 [2025-01-09 04:12:01,032 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2025-01-09 04:12:01,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2025-01-09 04:12:01,954 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 04:12:01,961 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 19 treesize of output 11 [2025-01-09 04:12:02,099 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2025-01-09 04:12:02,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 110 [2025-01-09 04:12:02,245 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 04:12:02,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:12:02,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 199 treesize of output 439 [2025-01-09 04:12:03,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:12:03,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 285 treesize of output 453 [2025-01-09 04:12:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 04:12:05,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 04:12:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 04:12:31,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973172149] [2025-01-09 04:12:31,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 04:12:31,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717034561] [2025-01-09 04:12:31,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717034561] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 04:12:31,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-01-09 04:12:31,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2025-01-09 04:12:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131745446] [2025-01-09 04:12:31,166 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-01-09 04:12:31,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-09 04:12:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 04:12:31,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-09 04:12:31,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1672, Unknown=5, NotChecked=0, Total=1806 [2025-01-09 04:12:31,168 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 8 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:12:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 04:12:34,733 INFO L93 Difference]: Finished difference Result 147 states and 176 transitions. [2025-01-09 04:12:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-09 04:12:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 8 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2025-01-09 04:12:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 04:12:34,736 INFO L225 Difference]: With dead ends: 147 [2025-01-09 04:12:34,736 INFO L226 Difference]: Without dead ends: 143 [2025-01-09 04:12:34,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=219, Invalid=2532, Unknown=5, NotChecked=0, Total=2756 [2025-01-09 04:12:34,737 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-01-09 04:12:34,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 598 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1086 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2025-01-09 04:12:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-01-09 04:12:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2025-01-09 04:12:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 93 states have internal predecessors, (99), 22 states have call successors, (22), 19 states have call predecessors, (22), 23 states have return successors, (39), 22 states have call predecessors, (39), 20 states have call successors, (39) [2025-01-09 04:12:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2025-01-09 04:12:34,765 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 49 [2025-01-09 04:12:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 04:12:34,765 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2025-01-09 04:12:34,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 8 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 04:12:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2025-01-09 04:12:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-01-09 04:12:34,766 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 04:12:34,766 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 04:12:34,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-09 04:12:34,970 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 04:12:34,970 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 04:12:34,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 04:12:34,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1947548496, now seen corresponding path program 1 times [2025-01-09 04:12:34,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 04:12:34,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321359180] [2025-01-09 04:12:34,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:12:34,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 04:12:34,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-09 04:12:35,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 04:12:35,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:12:35,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 04:12:35,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033821712] [2025-01-09 04:12:35,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 04:12:35,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 04:12:35,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 04:12:35,016 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 04:12:35,024 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 04:12:35,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-01-09 04:12:35,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-01-09 04:12:35,164 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 04:12:35,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 04:12:35,168 WARN L254 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 176 conjuncts are in the unsatisfiable core [2025-01-09 04:12:35,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 04:12:35,176 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 04:12:35,179 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 04:12:35,183 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 04:12:35,188 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 04:12:35,334 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 15 treesize of output 11 [2025-01-09 04:12:35,521 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 04:12:35,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:12:35,532 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 32 treesize of output 32 [2025-01-09 04:12:36,436 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 04:12:36,460 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2025-01-09 04:12:36,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2025-01-09 04:12:36,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 04:12:36,536 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 26 treesize of output 26 [2025-01-09 04:12:36,541 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 04:12:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-09 04:12:36,659 INFO L312 TraceCheckSpWp]: Computing backward predicates...