./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 30b7823755366f973ac95243d129f8492129fd0a43fc3ddfb545e22ce84d0c90 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 02:12:26,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 02:12:26,738 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 02:12:26,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 02:12:26,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 02:12:26,780 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 02:12:26,781 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 02:12:26,781 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 02:12:26,782 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 02:12:26,782 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 02:12:26,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 02:12:26,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 02:12:26,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 02:12:26,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 02:12:26,788 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 02:12:26,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 02:12:26,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 02:12:26,789 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 02:12:26,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 02:12:26,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 02:12:26,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 02:12:26,791 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 02:12:26,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 02:12:26,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 02:12:26,792 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 02:12:26,792 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 02:12:26,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 02:12:26,792 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 02:12:26,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 02:12:26,793 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 02:12:26,793 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 02:12:26,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 02:12:26,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:12:26,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 02:12:26,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 02:12:26,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 02:12:26,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 02:12:26,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 02:12:26,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 02:12:26,796 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 02:12:26,796 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 02:12:26,797 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 02:12:26,797 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30b7823755366f973ac95243d129f8492129fd0a43fc3ddfb545e22ce84d0c90 [2024-11-22 02:12:27,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 02:12:27,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 02:12:27,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 02:12:27,072 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 02:12:27,072 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 02:12:27,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i [2024-11-22 02:12:28,491 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 02:12:28,677 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 02:12:28,677 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i [2024-11-22 02:12:28,688 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26a2df75a/8327f888c6d64e60904b772338ffddb7/FLAGf0f20686f [2024-11-22 02:12:28,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26a2df75a/8327f888c6d64e60904b772338ffddb7 [2024-11-22 02:12:28,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 02:12:28,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 02:12:28,706 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 02:12:28,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 02:12:28,712 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 02:12:28,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:28,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472057d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28, skipping insertion in model container [2024-11-22 02:12:28,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:28,742 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 02:12:28,923 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i[1803,1816] [2024-11-22 02:12:28,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:12:28,954 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 02:12:28,967 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_4.i[1803,1816] [2024-11-22 02:12:28,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:12:28,995 INFO L204 MainTranslator]: Completed translation [2024-11-22 02:12:28,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28 WrapperNode [2024-11-22 02:12:28,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 02:12:28,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 02:12:28,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 02:12:28,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 02:12:29,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,027 INFO L138 Inliner]: procedures = 20, calls = 62, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2024-11-22 02:12:29,027 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 02:12:29,028 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 02:12:29,028 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 02:12:29,028 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 02:12:29,037 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,040 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,056 INFO L175 MemorySlicer]: Split 37 memory accesses to 6 slices as follows [2, 3, 11, 5, 11, 5]. 30 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 1, 0, 1, 0, 0]. The 9 writes are split as follows [0, 1, 3, 1, 3, 1]. [2024-11-22 02:12:29,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,089 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,092 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,093 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,102 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 02:12:29,104 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 02:12:29,104 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 02:12:29,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 02:12:29,105 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (1/1) ... [2024-11-22 02:12:29,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:12:29,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:29,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 02:12:29,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 02:12:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_41_0 [2024-11-22 02:12:29,195 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_41_0 [2024-11-22 02:12:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 02:12:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_49_to_54_0 [2024-11-22 02:12:29,195 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_49_to_54_0 [2024-11-22 02:12:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-22 02:12:29,195 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-22 02:12:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 02:12:29,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 02:12:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 02:12:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-22 02:12:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-22 02:12:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-22 02:12:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 02:12:29,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 02:12:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 02:12:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 02:12:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-22 02:12:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-22 02:12:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-22 02:12:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_58_to_61_0 [2024-11-22 02:12:29,197 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_58_to_61_0 [2024-11-22 02:12:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 02:12:29,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 02:12:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 02:12:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 02:12:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 02:12:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-22 02:12:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-22 02:12:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-22 02:12:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 02:12:29,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 02:12:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 02:12:29,289 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 02:12:29,291 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 02:12:29,518 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-22 02:12:29,518 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 02:12:29,531 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 02:12:29,535 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-22 02:12:29,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:12:29 BoogieIcfgContainer [2024-11-22 02:12:29,535 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 02:12:29,537 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 02:12:29,537 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 02:12:29,540 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 02:12:29,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:12:28" (1/3) ... [2024-11-22 02:12:29,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149a45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:12:29, skipping insertion in model container [2024-11-22 02:12:29,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:28" (2/3) ... [2024-11-22 02:12:29,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149a45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:12:29, skipping insertion in model container [2024-11-22 02:12:29,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:12:29" (3/3) ... [2024-11-22 02:12:29,542 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_4.i [2024-11-22 02:12:29,555 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 02:12:29,555 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 02:12:29,617 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 02:12:29,623 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;@369d3d06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 02:12:29,623 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 02:12:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 35 states have internal predecessors, (38), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-22 02:12:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-22 02:12:29,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:29,632 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:29,632 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:29,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash 991491108, now seen corresponding path program 1 times [2024-11-22 02:12:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:29,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232416638] [2024-11-22 02:12:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:29,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 02:12:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:29,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232416638] [2024-11-22 02:12:29,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232416638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:12:29,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429723359] [2024-11-22 02:12:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:29,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:29,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:12:29,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 02:12:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:30,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-22 02:12:30,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:12:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 02:12:30,021 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:12:30,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429723359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:12:30,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:12:30,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-22 02:12:30,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329709364] [2024-11-22 02:12:30,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:12:30,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 02:12:30,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 02:12:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 02:12:30,050 INFO L87 Difference]: Start difference. First operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 35 states have internal predecessors, (38), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 02:12:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:12:30,068 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2024-11-22 02:12:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 02:12:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-22 02:12:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:12:30,077 INFO L225 Difference]: With dead ends: 86 [2024-11-22 02:12:30,078 INFO L226 Difference]: Without dead ends: 42 [2024-11-22 02:12:30,081 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 02:12:30,085 INFO L432 NwaCegarLoop]: 58 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, 58 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 [2024-11-22 02:12:30,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 02:12:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-22 02:12:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-22 02:12:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 02:12:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-22 02:12:30,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2024-11-22 02:12:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:12:30,124 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-22 02:12:30,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 02:12:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-22 02:12:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-22 02:12:30,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:30,126 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:30,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 02:12:30,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-22 02:12:30,328 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:30,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash -744488160, now seen corresponding path program 1 times [2024-11-22 02:12:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:30,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198558786] [2024-11-22 02:12:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:30,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:12:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:30,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198558786] [2024-11-22 02:12:30,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198558786] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:12:30,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:12:30,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 02:12:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766272415] [2024-11-22 02:12:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:12:30,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 02:12:30,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:30,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 02:12:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 02:12:30,715 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 02:12:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:12:30,929 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2024-11-22 02:12:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 02:12:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-22 02:12:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:12:30,934 INFO L225 Difference]: With dead ends: 78 [2024-11-22 02:12:30,934 INFO L226 Difference]: Without dead ends: 44 [2024-11-22 02:12:30,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-22 02:12:30,936 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:12:30,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 55 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:12:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-22 02:12:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-22 02:12:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-22 02:12:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-22 02:12:30,948 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2024-11-22 02:12:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:12:30,949 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-22 02:12:30,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 02:12:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-22 02:12:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-22 02:12:30,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:30,952 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:30,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 02:12:30,953 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:30,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:30,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2084723388, now seen corresponding path program 1 times [2024-11-22 02:12:30,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:30,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863941634] [2024-11-22 02:12:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:30,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 02:12:31,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:31,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863941634] [2024-11-22 02:12:31,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863941634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:12:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723123197] [2024-11-22 02:12:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:31,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:31,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:31,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:12:31,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 02:12:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:31,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-22 02:12:31,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:12:31,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 02:12:31,799 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 [2024-11-22 02:12:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 02:12:31,894 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:12:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723123197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:12:31,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:12:31,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2024-11-22 02:12:31,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650959489] [2024-11-22 02:12:31,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:12:31,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 02:12:31,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 02:12:31,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2024-11-22 02:12:31,897 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 02:12:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:12:32,094 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2024-11-22 02:12:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 02:12:32,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-22 02:12:32,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:12:32,096 INFO L225 Difference]: With dead ends: 84 [2024-11-22 02:12:32,096 INFO L226 Difference]: Without dead ends: 56 [2024-11-22 02:12:32,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2024-11-22 02:12:32,097 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:12:32,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 266 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:12:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-22 02:12:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-11-22 02:12:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 34 states have internal predecessors, (36), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-22 02:12:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-11-22 02:12:32,113 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 33 [2024-11-22 02:12:32,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:12:32,114 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-11-22 02:12:32,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 02:12:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-11-22 02:12:32,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-22 02:12:32,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:32,116 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:32,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 02:12:32,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-22 02:12:32,322 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:32,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2082876346, now seen corresponding path program 1 times [2024-11-22 02:12:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:32,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726394743] [2024-11-22 02:12:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 02:12:32,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:32,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726394743] [2024-11-22 02:12:32,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726394743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:12:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495109436] [2024-11-22 02:12:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:32,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:32,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:32,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:12:32,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 02:12:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:32,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 02:12:32,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:12:32,854 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 [2024-11-22 02:12:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 02:12:33,035 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:12:33,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495109436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:12:33,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:12:33,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2024-11-22 02:12:33,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619501744] [2024-11-22 02:12:33,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:12:33,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 02:12:33,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 02:12:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-11-22 02:12:33,039 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 02:12:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:12:33,257 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-22 02:12:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 02:12:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-22 02:12:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:12:33,260 INFO L225 Difference]: With dead ends: 62 [2024-11-22 02:12:33,261 INFO L226 Difference]: Without dead ends: 60 [2024-11-22 02:12:33,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-11-22 02:12:33,262 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:12:33,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 329 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:12:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-22 02:12:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-11-22 02:12:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2024-11-22 02:12:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-22 02:12:33,274 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 33 [2024-11-22 02:12:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:12:33,275 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-22 02:12:33,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 02:12:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-22 02:12:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-22 02:12:33,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:33,276 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:33,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 02:12:33,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:33,477 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:33,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:33,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1178366220, now seen corresponding path program 1 times [2024-11-22 02:12:33,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:33,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152397420] [2024-11-22 02:12:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:33,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 02:12:33,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152397420] [2024-11-22 02:12:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152397420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:12:33,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:12:33,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 02:12:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765042295] [2024-11-22 02:12:33,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:12:33,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 02:12:33,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 02:12:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 02:12:33,642 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-22 02:12:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:12:33,771 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2024-11-22 02:12:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 02:12:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-11-22 02:12:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:12:33,773 INFO L225 Difference]: With dead ends: 70 [2024-11-22 02:12:33,773 INFO L226 Difference]: Without dead ends: 54 [2024-11-22 02:12:33,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 02:12:33,774 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:12:33,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 59 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:12:33,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-22 02:12:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-22 02:12:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2024-11-22 02:12:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-11-22 02:12:33,791 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 39 [2024-11-22 02:12:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:12:33,791 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-11-22 02:12:33,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-22 02:12:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-11-22 02:12:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-22 02:12:33,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:33,792 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:33,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 02:12:33,792 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:33,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1566797982, now seen corresponding path program 1 times [2024-11-22 02:12:33,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:33,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980335844] [2024-11-22 02:12:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:33,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-22 02:12:34,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980335844] [2024-11-22 02:12:34,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980335844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:12:34,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628747853] [2024-11-22 02:12:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:34,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:34,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:34,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:12:34,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 02:12:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:34,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-22 02:12:34,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:12:34,396 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 [2024-11-22 02:12:34,400 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 [2024-11-22 02:12:39,110 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-11-22 02:12:39,110 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 52 treesize of output 63 [2024-11-22 02:12:39,164 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-11-22 02:12:39,164 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 57 treesize of output 64 [2024-11-22 02:12:39,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-11-22 02:12:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 02:12:39,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:12:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 02:12:40,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628747853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:12:40,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:12:40,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 12] total 30 [2024-11-22 02:12:40,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618726500] [2024-11-22 02:12:40,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:12:40,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 02:12:40,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 02:12:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=772, Unknown=1, NotChecked=0, Total=870 [2024-11-22 02:12:40,649 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 30 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-22 02:12:44,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:12:48,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:12:53,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:12:57,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:01,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:05,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:10,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:14,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:30,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:34,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:38,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:42,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 02:13:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:47,584 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2024-11-22 02:13:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-22 02:13:47,584 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 49 [2024-11-22 02:13:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:47,586 INFO L225 Difference]: With dead ends: 114 [2024-11-22 02:13:47,586 INFO L226 Difference]: Without dead ends: 70 [2024-11-22 02:13:47,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=354, Invalid=2398, Unknown=4, NotChecked=0, Total=2756 [2024-11-22 02:13:47,590 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 34 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.7s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:47,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 225 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 939 Invalid, 12 Unknown, 0 Unchecked, 49.7s Time] [2024-11-22 02:13:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-22 02:13:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2024-11-22 02:13:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-22 02:13:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2024-11-22 02:13:47,609 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 49 [2024-11-22 02:13:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:47,610 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2024-11-22 02:13:47,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-22 02:13:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2024-11-22 02:13:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-22 02:13:47,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:47,612 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:47,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 02:13:47,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:47,817 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:47,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash -443988308, now seen corresponding path program 1 times [2024-11-22 02:13:47,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:47,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421316926] [2024-11-22 02:13:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:47,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 02:13:48,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421316926] [2024-11-22 02:13:48,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421316926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012773676] [2024-11-22 02:13:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:13:48,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:48,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:48,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:13:48,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 02:13:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:13:48,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-22 02:13:48,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-22 02:13:48,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 02:13:53,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012773676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:53,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:53,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 31 [2024-11-22 02:13:53,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448114490] [2024-11-22 02:13:53,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:53,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-22 02:13:53,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-22 02:13:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=796, Unknown=1, NotChecked=0, Total=930 [2024-11-22 02:13:53,986 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 31 states, 23 states have (on average 2.782608695652174) internal successors, (64), 27 states have internal predecessors, (64), 10 states have call successors, (22), 6 states have call predecessors, (22), 11 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-22 02:13:58,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 02:14:02,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []