./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-45.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-45.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 509571b928f0e2dfbb1c09fe2b4934eac01a43200c8a3311413a2cff66ec306f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 16:32:33,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 16:32:33,325 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 16:32:33,332 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 16:32:33,333 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 16:32:33,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 16:32:33,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 16:32:33,363 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 16:32:33,363 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 16:32:33,364 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 16:32:33,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 16:32:33,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 16:32:33,366 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 16:32:33,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 16:32:33,367 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 16:32:33,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 16:32:33,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 16:32:33,367 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 16:32:33,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 16:32:33,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 16:32:33,368 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 16:32:33,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 16:32:33,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 16:32:33,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 16:32:33,371 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 16:32:33,372 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 16:32:33,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 16:32:33,374 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 16:32:33,375 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 16:32:33,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 16:32:33,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 16:32:33,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 16:32:33,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 16:32:33,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 16:32:33,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 16:32:33,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 16:32:33,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 16:32:33,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 16:32:33,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 16:32:33,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 16:32:33,377 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 16:32:33,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 16:32:33,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509571b928f0e2dfbb1c09fe2b4934eac01a43200c8a3311413a2cff66ec306f [2024-11-16 16:32:33,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 16:32:33,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 16:32:33,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 16:32:33,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 16:32:33,642 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 16:32:33,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-45.i [2024-11-16 16:32:35,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 16:32:35,311 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 16:32:35,314 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-45.i [2024-11-16 16:32:35,326 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc102ac44/f6931853396c4c9b9fade509500faa78/FLAG1b689dd4e [2024-11-16 16:32:35,338 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc102ac44/f6931853396c4c9b9fade509500faa78 [2024-11-16 16:32:35,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 16:32:35,342 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 16:32:35,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 16:32:35,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 16:32:35,348 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 16:32:35,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a8106fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35, skipping insertion in model container [2024-11-16 16:32:35,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,371 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 16:32:35,548 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/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-45.i[915,928] [2024-11-16 16:32:35,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 16:32:35,630 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 16:32:35,639 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/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-45.i[915,928] [2024-11-16 16:32:35,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 16:32:35,681 INFO L204 MainTranslator]: Completed translation [2024-11-16 16:32:35,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35 WrapperNode [2024-11-16 16:32:35,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 16:32:35,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 16:32:35,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 16:32:35,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 16:32:35,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,728 INFO L138 Inliner]: procedures = 26, calls = 32, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 116 [2024-11-16 16:32:35,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 16:32:35,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 16:32:35,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 16:32:35,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 16:32:35,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,745 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,757 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]. [2024-11-16 16:32:35,758 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,758 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,767 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,767 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,773 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 16:32:35,777 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 16:32:35,777 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 16:32:35,777 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 16:32:35,778 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (1/1) ... [2024-11-16 16:32:35,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 16:32:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 16:32:35,821 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) [2024-11-16 16:32:35,824 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 [2024-11-16 16:32:35,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 16:32:35,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-16 16:32:35,873 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-16 16:32:35,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 16:32:35,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 16:32:35,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 16:32:35,969 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 16:32:35,971 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 16:32:36,263 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-16 16:32:36,267 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 16:32:36,282 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 16:32:36,283 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 16:32:36,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 04:32:36 BoogieIcfgContainer [2024-11-16 16:32:36,284 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 16:32:36,286 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 16:32:36,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 16:32:36,290 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 16:32:36,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:32:35" (1/3) ... [2024-11-16 16:32:36,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bea51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:32:36, skipping insertion in model container [2024-11-16 16:32:36,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:32:35" (2/3) ... [2024-11-16 16:32:36,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bea51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:32:36, skipping insertion in model container [2024-11-16 16:32:36,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 04:32:36" (3/3) ... [2024-11-16 16:32:36,295 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-45.i [2024-11-16 16:32:36,312 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 16:32:36,313 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 16:32:36,391 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 16:32:36,398 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;@6f53c271, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 16:32:36,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 16:32:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 19 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-16 16:32:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-16 16:32:36,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 16:32:36,413 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 16:32:36,413 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 16:32:36,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 16:32:36,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1990871140, now seen corresponding path program 1 times [2024-11-16 16:32:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 16:32:36,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014679815] [2024-11-16 16:32:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 16:32:36,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 16:32:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 16:32:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-16 16:32:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,726 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 16:32:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 16:32:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 16:32:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-16 16:32:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-16 16:32:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-16 16:32:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-16 16:32:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-11-16 16:32:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-11-16 16:32:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-11-16 16:32:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-11-16 16:32:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-16 16:32:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-11-16 16:32:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-11-16 16:32:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-11-16 16:32:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-11-16 16:32:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-11-16 16:32:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-11-16 16:32:36,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 16:32:36,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014679815] [2024-11-16 16:32:36,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014679815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 16:32:36,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 16:32:36,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 16:32:36,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566282432] [2024-11-16 16:32:36,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 16:32:36,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 16:32:36,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 16:32:36,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 16:32:36,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 16:32:36,913 INFO L87 Difference]: Start difference. First operand has 57 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 19 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 1 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-16 16:32:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 16:32:36,937 INFO L93 Difference]: Finished difference Result 106 states and 176 transitions. [2024-11-16 16:32:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 16:32:36,939 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 1 states have call predecessors, (19), 2 states have call successors, (19) Word has length 121 [2024-11-16 16:32:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 16:32:36,945 INFO L225 Difference]: With dead ends: 106 [2024-11-16 16:32:36,946 INFO L226 Difference]: Without dead ends: 52 [2024-11-16 16:32:36,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 16:32:36,955 INFO L432 NwaCegarLoop]: 74 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, 74 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 16:32:36,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 16:32:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-16 16:32:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-16 16:32:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 19 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-16 16:32:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2024-11-16 16:32:37,047 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 121 [2024-11-16 16:32:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 16:32:37,048 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2024-11-16 16:32:37,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (19), 1 states have call predecessors, (19), 1 states have return successors, (19), 1 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-16 16:32:37,049 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2024-11-16 16:32:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-16 16:32:37,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 16:32:37,079 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 16:32:37,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 16:32:37,079 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 16:32:37,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 16:32:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash 593820839, now seen corresponding path program 1 times [2024-11-16 16:32:37,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 16:32:37,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879686506] [2024-11-16 16:32:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 16:32:37,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 16:32:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 16:32:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-16 16:32:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 16:32:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,213 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 16:32:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 16:32:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-16 16:32:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-16 16:32:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-16 16:32:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-16 16:32:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-11-16 16:32:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,308 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-11-16 16:32:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-11-16 16:32:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-11-16 16:32:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-16 16:32:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-11-16 16:32:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-11-16 16:32:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-11-16 16:32:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-11-16 16:32:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-11-16 16:32:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 60 proven. 120 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-16 16:32:39,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 16:32:39,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879686506] [2024-11-16 16:32:39,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879686506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 16:32:39,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400201845] [2024-11-16 16:32:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 16:32:39,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 16:32:39,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 16:32:39,383 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) [2024-11-16 16:32:39,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 16:32:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 16:32:39,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-16 16:32:40,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 16:32:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 471 proven. 132 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-16 16:32:41,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 16:33:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 135 proven. 144 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2024-11-16 16:33:17,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400201845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 16:33:17,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 16:33:17,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 25, 22] total 49 [2024-11-16 16:33:17,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996424504] [2024-11-16 16:33:17,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 16:33:17,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-16 16:33:17,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 16:33:17,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-16 16:33:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 16:33:17,738 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 49 states, 45 states have (on average 2.111111111111111) internal successors, (95), 41 states have internal predecessors, (95), 16 states have call successors, (45), 8 states have call predecessors, (45), 16 states have return successors, (46), 16 states have call predecessors, (46), 16 states have call successors, (46) [2024-11-16 16:33:43,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 16:33:47,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []