./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.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_1-1.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 affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 02:12:16,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 02:12:16,995 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 02:12:16,998 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 02:12:16,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 02:12:17,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 02:12:17,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 02:12:17,022 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 02:12:17,022 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 02:12:17,023 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 02:12:17,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 02:12:17,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 02:12:17,023 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 02:12:17,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 02:12:17,024 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 02:12:17,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 02:12:17,024 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 02:12:17,025 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 02:12:17,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 02:12:17,027 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 02:12:17,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 02:12:17,029 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 02:12:17,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 02:12:17,030 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 02:12:17,030 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 02:12:17,030 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 02:12:17,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 02:12:17,032 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 02:12:17,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 02:12:17,032 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 02:12:17,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 02:12:17,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 02:12:17,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:12:17,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 02:12:17,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 02:12:17,034 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 02:12:17,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 02:12:17,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 02:12:17,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 02:12:17,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 02:12:17,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 02:12:17,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 02:12:17,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 [2024-11-22 02:12:17,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 02:12:17,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 02:12:17,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 02:12:17,224 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 02:12:17,224 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 02:12:17,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2024-11-22 02:12:18,674 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 02:12:18,818 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 02:12:18,818 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2024-11-22 02:12:18,826 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/becfcfbbb/7c5b182e9c43456e8cd31d22cf8a2f45/FLAG1cec5ff28 [2024-11-22 02:12:18,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/becfcfbbb/7c5b182e9c43456e8cd31d22cf8a2f45 [2024-11-22 02:12:18,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 02:12:18,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 02:12:18,848 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 02:12:18,848 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 02:12:18,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 02:12:18,854 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:12:18" (1/1) ... [2024-11-22 02:12:18,856 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb0cf94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:18, skipping insertion in model container [2024-11-22 02:12:18,856 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:12:18" (1/1) ... [2024-11-22 02:12:18,875 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 02:12:19,019 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_1-1.i[1692,1705] [2024-11-22 02:12:19,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:12:19,035 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 02:12:19,044 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_1-1.i[1692,1705] [2024-11-22 02:12:19,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:12:19,085 INFO L204 MainTranslator]: Completed translation [2024-11-22 02:12:19,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19 WrapperNode [2024-11-22 02:12:19,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 02:12:19,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 02:12:19,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 02:12:19,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 02:12:19,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,100 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,130 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-11-22 02:12:19,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 02:12:19,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 02:12:19,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 02:12:19,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 02:12:19,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,143 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,158 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 13, 3]. 72 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 5 writes are split as follows [0, 4, 1]. [2024-11-22 02:12:19,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,159 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,164 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,167 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 02:12:19,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 02:12:19,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 02:12:19,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 02:12:19,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (1/1) ... [2024-11-22 02:12:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:12:19,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:19,209 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 02:12:19,213 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 02:12:19,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 02:12:19,260 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_33_0 [2024-11-22 02:12:19,260 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_33_0 [2024-11-22 02:12:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 02:12:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 02:12:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 02:12:19,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 02:12:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 02:12:19,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 02:12:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 02:12:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 02:12:19,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 02:12:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 02:12:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 02:12:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 02:12:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 02:12:19,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 02:12:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 02:12:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_40_0 [2024-11-22 02:12:19,265 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_40_0 [2024-11-22 02:12:19,345 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 02:12:19,347 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 02:12:19,501 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-22 02:12:19,502 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 02:12:19,513 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 02:12:19,513 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-22 02:12:19,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:12:19 BoogieIcfgContainer [2024-11-22 02:12:19,514 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 02:12:19,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 02:12:19,515 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 02:12:19,518 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 02:12:19,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:12:18" (1/3) ... [2024-11-22 02:12:19,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae43ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:12:19, skipping insertion in model container [2024-11-22 02:12:19,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:12:19" (2/3) ... [2024-11-22 02:12:19,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae43ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:12:19, skipping insertion in model container [2024-11-22 02:12:19,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:12:19" (3/3) ... [2024-11-22 02:12:19,520 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_1-1.i [2024-11-22 02:12:19,534 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 02:12:19,534 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 02:12:19,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 02:12:19,621 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;@2c04db55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 02:12:19,622 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 02:12:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.25) internal successors, (25), 23 states have internal predecessors, (25), 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) [2024-11-22 02:12:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-22 02:12:19,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:19,638 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:19,638 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:19,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1126307537, now seen corresponding path program 1 times [2024-11-22 02:12:19,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:19,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660802913] [2024-11-22 02:12:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:19,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:12:20,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:20,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660802913] [2024-11-22 02:12:20,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660802913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:12:20,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:12:20,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 02:12:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816038826] [2024-11-22 02:12:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:12:20,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 02:12:20,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 02:12:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 02:12:20,368 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.25) internal successors, (25), 23 states have internal predecessors, (25), 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 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-22 02:12:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:12:20,568 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2024-11-22 02:12:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 02:12:20,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 16 [2024-11-22 02:12:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:12:20,579 INFO L225 Difference]: With dead ends: 59 [2024-11-22 02:12:20,579 INFO L226 Difference]: Without dead ends: 27 [2024-11-22 02:12:20,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-22 02:12:20,585 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:12:20,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 46 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:12:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-22 02:12:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-22 02:12:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-22 02:12:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-22 02:12:20,627 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2024-11-22 02:12:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:12:20,628 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-22 02:12:20,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-22 02:12:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-22 02:12:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-22 02:12:20,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:20,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:20,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 02:12:20,630 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:20,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 324223833, now seen corresponding path program 1 times [2024-11-22 02:12:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:20,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477770548] [2024-11-22 02:12:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:20,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 02:12:21,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:21,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477770548] [2024-11-22 02:12:21,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477770548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:12:21,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420819803] [2024-11-22 02:12:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:12:21,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:21,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:21,196 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 02:12:21,201 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 02:12:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:12:21,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-22 02:12:21,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:12:21,327 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 [2024-11-22 02:12:21,403 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 27 treesize of output 23 [2024-11-22 02:12:21,526 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 [2024-11-22 02:12:21,567 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 [2024-11-22 02:12:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:12:21,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:12:22,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2024-11-22 02:12:22,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2024-11-22 02:12:22,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:12:22,914 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 98 treesize of output 100 [2024-11-22 02:12:23,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-22 02:12:23,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2024-11-22 02:12:23,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2024-11-22 02:12:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:12:23,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420819803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:12:23,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:12:23,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 33 [2024-11-22 02:12:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960282831] [2024-11-22 02:12:23,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:12:23,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 02:12:23,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 02:12:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 02:12:23,345 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 33 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 10 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 02:12:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:12:24,059 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-11-22 02:12:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 02:12:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 10 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 21 [2024-11-22 02:12:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:12:24,061 INFO L225 Difference]: With dead ends: 46 [2024-11-22 02:12:24,061 INFO L226 Difference]: Without dead ends: 29 [2024-11-22 02:12:24,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2024-11-22 02:12:24,063 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-22 02:12:24,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 130 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-22 02:12:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-22 02:12:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-22 02:12:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 02:12:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-22 02:12:24,074 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2024-11-22 02:12:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:12:24,075 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-22 02:12:24,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 10 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 02:12:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-22 02:12:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-22 02:12:24,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:24,076 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:24,086 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 02:12:24,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:24,277 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:24,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:24,278 INFO L85 PathProgramCache]: Analyzing trace with hash 736927771, now seen corresponding path program 2 times [2024-11-22 02:12:24,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:24,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123313563] [2024-11-22 02:12:24,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:12:24,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:24,303 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:12:24,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:12:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 02:12:24,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:24,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123313563] [2024-11-22 02:12:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123313563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:12:24,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127921554] [2024-11-22 02:12:24,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:12:24,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:24,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:24,942 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 02:12:24,944 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 02:12:25,060 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:12:25,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:12:25,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-22 02:12:25,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:12:25,071 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 [2024-11-22 02:12:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 02:12:25,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:12:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:12:30,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127921554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:12:30,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:12:30,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 29 [2024-11-22 02:12:30,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308370013] [2024-11-22 02:12:30,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:12:30,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 02:12:30,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:12:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 02:12:30,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=684, Unknown=1, NotChecked=0, Total=812 [2024-11-22 02:12:30,201 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 25 states have internal predecessors, (34), 8 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-22 02:12:34,300 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 02:12:38,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 02:12:50,344 WARN L539 Checker$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 02:12:54,348 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 02:12:54,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:12:54,874 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-11-22 02:12:54,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 02:12:54,876 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 25 states have internal predecessors, (34), 8 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 26 [2024-11-22 02:12:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:12:54,877 INFO L225 Difference]: With dead ends: 50 [2024-11-22 02:12:54,877 INFO L226 Difference]: Without dead ends: 33 [2024-11-22 02:12:54,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=171, Invalid=882, Unknown=3, NotChecked=0, Total=1056 [2024-11-22 02:12:54,879 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2024-11-22 02:12:54,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 114 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 371 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2024-11-22 02:12:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-22 02:12:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-22 02:12:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-22 02:12:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-22 02:12:54,891 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2024-11-22 02:12:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:12:54,892 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-22 02:12:54,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 25 states have internal predecessors, (34), 8 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-22 02:12:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-22 02:12:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-22 02:12:54,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:12:54,893 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:12:54,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 02:12:55,093 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 02:12:55,094 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:12:55,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:12:55,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1964766107, now seen corresponding path program 3 times [2024-11-22 02:12:55,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:12:55,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009902369] [2024-11-22 02:12:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:12:55,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:12:55,172 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 02:12:55,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:12:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 02:12:56,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:12:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009902369] [2024-11-22 02:12:56,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009902369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:12:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341480182] [2024-11-22 02:12:56,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:12:56,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:12:56,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:12:56,080 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 02:12:56,081 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 02:12:56,401 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 02:12:56,402 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:12:56,407 WARN L253 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-22 02:12:56,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:12:56,420 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 [2024-11-22 02:12:56,536 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 83 treesize of output 70 [2024-11-22 02:12:56,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2024-11-22 02:12:56,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2024-11-22 02:12:57,503 INFO L349 Elim1Store]: treesize reduction 423, result has 3.9 percent of original size [2024-11-22 02:12:57,504 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 4 case distinctions, treesize of input 162 treesize of output 102 [2024-11-22 02:12:58,676 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 [2024-11-22 02:12:58,790 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 [2024-11-22 02:12:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 02:12:59,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,615 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,621 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,624 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,628 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:13:03,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 16 case distinctions, treesize of input 399 treesize of output 514 [2024-11-22 02:13:03,938 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,939 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,942 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,944 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,945 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,946 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,947 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,977 INFO L349 Elim1Store]: treesize reduction 5, result has 83.9 percent of original size [2024-11-22 02:13:03,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 396 treesize of output 338 [2024-11-22 02:13:03,997 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:03,999 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 395 treesize of output 325 [2024-11-22 02:13:04,010 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,012 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,013 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,014 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,017 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,017 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 200 [2024-11-22 02:13:04,148 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 208 treesize of output 187 [2024-11-22 02:13:04,157 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,158 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,159 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 02:13:04,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:13:04,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 112 [2024-11-22 02:13:04,177 INFO L349 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2024-11-22 02:13:04,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 121 treesize of output 50 [2024-11-22 02:13:06,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341480182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:06,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 02:13:06,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 37 [2024-11-22 02:13:06,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014019272] [2024-11-22 02:13:06,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:06,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-22 02:13:06,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-22 02:13:06,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2024-11-22 02:13:06,639 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 37 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 32 states have internal predecessors, (43), 11 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-22 02:13:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:13:11,024 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2024-11-22 02:13:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-22 02:13:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 32 states have internal predecessors, (43), 11 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 36 [2024-11-22 02:13:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:13:11,026 INFO L225 Difference]: With dead ends: 64 [2024-11-22 02:13:11,026 INFO L226 Difference]: Without dead ends: 47 [2024-11-22 02:13:11,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=360, Invalid=3672, Unknown=0, NotChecked=0, Total=4032 [2024-11-22 02:13:11,027 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-22 02:13:11,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 192 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-22 02:13:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-22 02:13:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2024-11-22 02:13:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-22 02:13:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-11-22 02:13:11,038 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 36 [2024-11-22 02:13:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:13:11,038 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-11-22 02:13:11,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 32 states have internal predecessors, (43), 11 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-22 02:13:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-11-22 02:13:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 02:13:11,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:13:11,040 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:13:11,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 02:13:11,244 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 02:13:11,245 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:13:11,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:13:11,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1877836691, now seen corresponding path program 4 times [2024-11-22 02:13:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:13:11,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154283206] [2024-11-22 02:13:11,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 02:13:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:13:11,267 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 02:13:11,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-22 02:13:12,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:13:12,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154283206] [2024-11-22 02:13:12,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154283206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:13:12,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754693856] [2024-11-22 02:13:12,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 02:13:12,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:13:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:13:12,217 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 02:13:12,219 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 02:13:12,320 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 02:13:12,321 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:13:12,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-22 02:13:12,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:13:12,333 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 [2024-11-22 02:13:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-22 02:13:12,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:13:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 02:13:55,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754693856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:13:55,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:13:55,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 26] total 48 [2024-11-22 02:13:55,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129345006] [2024-11-22 02:13:55,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:13:55,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-22 02:13:55,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:13:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-22 02:13:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2010, Unknown=10, NotChecked=0, Total=2256 [2024-11-22 02:13:55,200 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 41 states have internal predecessors, (50), 12 states have call successors, (13), 8 states have call predecessors, (13), 18 states have return successors, (18), 16 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-22 02:13:59,341 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 []