./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-28.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-28.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 19cc8c12b97d00c18bd753d2c40678eb07734cfb5a01e7b7c6c980ae83e69a6f --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 11:02:07,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 11:02:07,186 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 11:02:07,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 11:02:07,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 11:02:07,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 11:02:07,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 11:02:07,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 11:02:07,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 11:02:07,209 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 11:02:07,209 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 11:02:07,209 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 11:02:07,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 11:02:07,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 11:02:07,209 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 11:02:07,209 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 11:02:07,209 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 11:02:07,210 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 11:02:07,210 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 11:02:07,211 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 11:02:07,211 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 11:02:07,211 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 11:02:07,212 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19cc8c12b97d00c18bd753d2c40678eb07734cfb5a01e7b7c6c980ae83e69a6f [2025-01-09 11:02:07,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 11:02:07,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 11:02:07,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 11:02:07,426 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 11:02:07,426 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 11:02:07,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-28.i [2025-01-09 11:02:08,577 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f41ea24a/631ee08ed3e04d15ab2a7db8e39686d7/FLAGde83ead03 [2025-01-09 11:02:08,804 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 11:02:08,806 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-28.i [2025-01-09 11:02:08,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f41ea24a/631ee08ed3e04d15ab2a7db8e39686d7/FLAGde83ead03 [2025-01-09 11:02:08,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5f41ea24a/631ee08ed3e04d15ab2a7db8e39686d7 [2025-01-09 11:02:08,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 11:02:08,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 11:02:08,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 11:02:08,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 11:02:08,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 11:02:08,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:02:08" (1/1) ... [2025-01-09 11:02:08,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@378fba94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:08, skipping insertion in model container [2025-01-09 11:02:08,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:02:08" (1/1) ... [2025-01-09 11:02:08,880 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 11:02:08,981 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-28.i[919,932] [2025-01-09 11:02:09,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 11:02:09,054 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 11:02:09,061 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-ci_file-28.i[919,932] [2025-01-09 11:02:09,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 11:02:09,115 INFO L204 MainTranslator]: Completed translation [2025-01-09 11:02:09,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09 WrapperNode [2025-01-09 11:02:09,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 11:02:09,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 11:02:09,118 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 11:02:09,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 11:02:09,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,163 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 229 [2025-01-09 11:02:09,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 11:02:09,164 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 11:02:09,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 11:02:09,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 11:02:09,171 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,180 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,197 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 11:02:09,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,214 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,218 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,222 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,228 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,235 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 11:02:09,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 11:02:09,236 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 11:02:09,236 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 11:02:09,237 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (1/1) ... [2025-01-09 11:02:09,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 11:02:09,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 11:02:09,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 11:02:09,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 11:02:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 11:02:09,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 11:02:09,281 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 11:02:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 11:02:09,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 11:02:09,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 11:02:09,341 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 11:02:09,343 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 11:02:09,725 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2025-01-09 11:02:09,725 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 11:02:09,733 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 11:02:09,735 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 11:02:09,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:02:09 BoogieIcfgContainer [2025-01-09 11:02:09,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 11:02:09,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 11:02:09,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 11:02:09,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 11:02:09,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:02:08" (1/3) ... [2025-01-09 11:02:09,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3ef6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:02:09, skipping insertion in model container [2025-01-09 11:02:09,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:09" (2/3) ... [2025-01-09 11:02:09,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3ef6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:02:09, skipping insertion in model container [2025-01-09 11:02:09,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:02:09" (3/3) ... [2025-01-09 11:02:09,743 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-ci_file-28.i [2025-01-09 11:02:09,753 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 11:02:09,755 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_fillercode_fillercodestructure_filler-pr-ci_file-28.i that has 2 procedures, 98 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-01-09 11:02:09,799 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 11:02:09,806 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;@2e1a0483, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 11:02:09,806 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 11:02:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 70 states have internal predecessors, (100), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2025-01-09 11:02:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-01-09 11:02:09,816 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 11:02:09,816 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 26, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 11:02:09,817 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 11:02:09,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 11:02:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1153973702, now seen corresponding path program 1 times [2025-01-09 11:02:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 11:02:09,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339338059] [2025-01-09 11:02:09,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 11:02:09,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 11:02:09,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 176 statements into 1 equivalence classes. [2025-01-09 11:02:09,925 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 176 of 176 statements. [2025-01-09 11:02:09,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 11:02:09,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 11:02:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2025-01-09 11:02:10,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 11:02:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339338059] [2025-01-09 11:02:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339338059] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 11:02:10,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92151468] [2025-01-09 11:02:10,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 11:02:10,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 11:02:10,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 11:02:10,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 11:02:10,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 11:02:10,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 176 statements into 1 equivalence classes. [2025-01-09 11:02:10,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 176 of 176 statements. [2025-01-09 11:02:10,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 11:02:10,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 11:02:10,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 11:02:10,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 11:02:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2025-01-09 11:02:10,250 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 11:02:10,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92151468] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 11:02:10,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 11:02:10,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 11:02:10,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056862994] [2025-01-09 11:02:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 11:02:10,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 11:02:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 11:02:10,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 11:02:10,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 11:02:10,275 INFO L87 Difference]: Start difference. First operand has 98 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 70 states have internal predecessors, (100), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2025-01-09 11:02:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 11:02:10,299 INFO L93 Difference]: Finished difference Result 190 states and 325 transitions. [2025-01-09 11:02:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 11:02:10,301 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) Word has length 176 [2025-01-09 11:02:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 11:02:10,305 INFO L225 Difference]: With dead ends: 190 [2025-01-09 11:02:10,305 INFO L226 Difference]: Without dead ends: 95 [2025-01-09 11:02:10,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 11:02:10,310 INFO L435 NwaCegarLoop]: 147 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, 147 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 11:02:10,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 11:02:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-01-09 11:02:10,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2025-01-09 11:02:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 67 states have internal predecessors, (95), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2025-01-09 11:02:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 147 transitions. [2025-01-09 11:02:10,339 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 147 transitions. Word has length 176 [2025-01-09 11:02:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 11:02:10,340 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 147 transitions. [2025-01-09 11:02:10,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2025-01-09 11:02:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 147 transitions. [2025-01-09 11:02:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-01-09 11:02:10,342 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 11:02:10,342 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 26, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 11:02:10,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 11:02:10,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-01-09 11:02:10,543 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 11:02:10,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 11:02:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1691314050, now seen corresponding path program 1 times [2025-01-09 11:02:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 11:02:10,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318470629] [2025-01-09 11:02:10,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 11:02:10,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 11:02:10,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 176 statements into 1 equivalence classes. [2025-01-09 11:02:10,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 176 of 176 statements. [2025-01-09 11:02:10,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 11:02:10,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 11:02:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2025-01-09 11:02:10,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 11:02:10,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318470629] [2025-01-09 11:02:10,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318470629] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 11:02:10,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 11:02:10,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 11:02:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285722258] [2025-01-09 11:02:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 11:02:10,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 11:02:10,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 11:02:10,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 11:02:10,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 11:02:10,887 INFO L87 Difference]: Start difference. First operand 95 states and 147 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2025-01-09 11:02:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 11:02:10,920 INFO L93 Difference]: Finished difference Result 188 states and 293 transitions. [2025-01-09 11:02:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 11:02:10,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 176 [2025-01-09 11:02:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 11:02:10,923 INFO L225 Difference]: With dead ends: 188 [2025-01-09 11:02:10,923 INFO L226 Difference]: Without dead ends: 96 [2025-01-09 11:02:10,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 11:02:10,926 INFO L435 NwaCegarLoop]: 146 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 11:02:10,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 286 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 11:02:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-01-09 11:02:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2025-01-09 11:02:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.411764705882353) internal successors, (96), 68 states have internal predecessors, (96), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2025-01-09 11:02:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 148 transitions. [2025-01-09 11:02:10,943 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 148 transitions. Word has length 176 [2025-01-09 11:02:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 11:02:10,944 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 148 transitions. [2025-01-09 11:02:10,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2025-01-09 11:02:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 148 transitions. [2025-01-09 11:02:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-01-09 11:02:10,946 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 11:02:10,946 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 26, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 11:02:10,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 11:02:10,946 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 11:02:10,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 11:02:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash 609508540, now seen corresponding path program 1 times [2025-01-09 11:02:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 11:02:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552784828] [2025-01-09 11:02:10,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 11:02:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 11:02:10,959 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 176 statements into 1 equivalence classes. [2025-01-09 11:02:11,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 176 of 176 statements. [2025-01-09 11:02:11,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 11:02:11,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 11:02:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2025-01-09 11:02:13,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 11:02:13,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552784828] [2025-01-09 11:02:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552784828] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 11:02:13,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 11:02:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-01-09 11:02:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924303871] [2025-01-09 11:02:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 11:02:13,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 11:02:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 11:02:13,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 11:02:13,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-01-09 11:02:13,613 INFO L87 Difference]: Start difference. First operand 96 states and 148 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2025-01-09 11:02:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 11:02:14,596 INFO L93 Difference]: Finished difference Result 435 states and 657 transitions. [2025-01-09 11:02:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 11:02:14,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 176 [2025-01-09 11:02:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 11:02:14,599 INFO L225 Difference]: With dead ends: 435 [2025-01-09 11:02:14,599 INFO L226 Difference]: Without dead ends: 342 [2025-01-09 11:02:14,600 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2025-01-09 11:02:14,600 INFO L435 NwaCegarLoop]: 137 mSDtfsCounter, 777 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 11:02:14,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 727 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 11:02:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2025-01-09 11:02:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 257. [2025-01-09 11:02:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 193 states have (on average 1.4145077720207253) internal successors, (273), 195 states have internal predecessors, (273), 58 states have call successors, (58), 5 states have call predecessors, (58), 5 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2025-01-09 11:02:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 389 transitions. [2025-01-09 11:02:14,629 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 389 transitions. Word has length 176 [2025-01-09 11:02:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 11:02:14,630 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 389 transitions. [2025-01-09 11:02:14,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2025-01-09 11:02:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 389 transitions. [2025-01-09 11:02:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-01-09 11:02:14,632 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 11:02:14,632 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 26, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 11:02:14,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 11:02:14,632 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 11:02:14,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 11:02:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash -670355138, now seen corresponding path program 1 times [2025-01-09 11:02:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 11:02:14,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836213805] [2025-01-09 11:02:14,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 11:02:14,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 11:02:14,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 176 statements into 1 equivalence classes. [2025-01-09 11:02:14,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 176 of 176 statements. [2025-01-09 11:02:14,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 11:02:14,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 11:03:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2025-01-09 11:03:35,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 11:03:35,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836213805] [2025-01-09 11:03:35,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836213805] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 11:03:35,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 11:03:35,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-01-09 11:03:35,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116881145] [2025-01-09 11:03:35,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 11:03:35,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 11:03:35,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 11:03:35,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 11:03:35,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-01-09 11:03:35,188 INFO L87 Difference]: Start difference. First operand 257 states and 389 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2025-01-09 11:03:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 11:03:36,963 INFO L93 Difference]: Finished difference Result 615 states and 929 transitions. [2025-01-09 11:03:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 11:03:36,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 176 [2025-01-09 11:03:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 11:03:36,967 INFO L225 Difference]: With dead ends: 615 [2025-01-09 11:03:36,967 INFO L226 Difference]: Without dead ends: 361 [2025-01-09 11:03:36,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-01-09 11:03:36,969 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 318 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-01-09 11:03:36,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 644 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-01-09 11:03:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2025-01-09 11:03:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 277. [2025-01-09 11:03:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 213 states have (on average 1.4272300469483568) internal successors, (304), 215 states have internal predecessors, (304), 58 states have call successors, (58), 5 states have call predecessors, (58), 5 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2025-01-09 11:03:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 420 transitions. [2025-01-09 11:03:37,004 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 420 transitions. Word has length 176 [2025-01-09 11:03:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 11:03:37,005 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 420 transitions. [2025-01-09 11:03:37,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2025-01-09 11:03:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 420 transitions. [2025-01-09 11:03:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-01-09 11:03:37,007 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 11:03:37,008 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 26, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 11:03:37,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 11:03:37,008 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 11:03:37,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 11:03:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash -411559814, now seen corresponding path program 1 times [2025-01-09 11:03:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 11:03:37,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460825666] [2025-01-09 11:03:37,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 11:03:37,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 11:03:37,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 176 statements into 1 equivalence classes. [2025-01-09 11:03:37,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 176 of 176 statements. [2025-01-09 11:03:37,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 11:03:37,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat