./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-84.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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_operatoramount_amount250_file-84.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 54a452aafc3ad15c1ca5b324711d24dde38f7844e5b94bac37b2af7fa81c8041 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 23:48:06,044 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 23:48:06,125 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 23:48:06,128 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 23:48:06,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 23:48:06,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 23:48:06,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 23:48:06,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 23:48:06,154 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 23:48:06,155 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 23:48:06,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 23:48:06,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 23:48:06,156 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 23:48:06,156 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 23:48:06,157 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 23:48:06,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 23:48:06,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 23:48:06,157 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 23:48:06,158 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 23:48:06,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 23:48:06,158 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 23:48:06,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 23:48:06,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 23:48:06,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 23:48:06,163 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 23:48:06,163 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 23:48:06,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 23:48:06,163 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 23:48:06,164 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 23:48:06,164 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 23:48:06,164 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 23:48:06,164 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 23:48:06,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 23:48:06,164 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 23:48:06,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 23:48:06,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 23:48:06,165 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 23:48:06,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 23:48:06,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 23:48:06,165 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 23:48:06,165 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 23:48:06,166 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 23:48:06,166 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54a452aafc3ad15c1ca5b324711d24dde38f7844e5b94bac37b2af7fa81c8041 [2024-11-18 23:48:06,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 23:48:06,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 23:48:06,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 23:48:06,384 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 23:48:06,384 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 23:48:06,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-84.i [2024-11-18 23:48:07,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 23:48:07,784 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 23:48:07,785 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-84.i [2024-11-18 23:48:07,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61514f8b/3e2871202e864976bd185ea13f672788/FLAGde5559bb0 [2024-11-18 23:48:08,133 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61514f8b/3e2871202e864976bd185ea13f672788 [2024-11-18 23:48:08,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 23:48:08,136 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 23:48:08,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 23:48:08,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 23:48:08,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 23:48:08,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660c02c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08, skipping insertion in model container [2024-11-18 23:48:08,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,176 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 23:48:08,333 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_operatoramount_amount250_file-84.i[916,929] [2024-11-18 23:48:08,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 23:48:08,466 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 23:48:08,475 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_operatoramount_amount250_file-84.i[916,929] [2024-11-18 23:48:08,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 23:48:08,544 INFO L204 MainTranslator]: Completed translation [2024-11-18 23:48:08,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08 WrapperNode [2024-11-18 23:48:08,545 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 23:48:08,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 23:48:08,546 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 23:48:08,546 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 23:48:08,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,644 INFO L138 Inliner]: procedures = 26, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 427 [2024-11-18 23:48:08,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 23:48:08,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 23:48:08,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 23:48:08,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 23:48:08,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,669 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,714 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]. [2024-11-18 23:48:08,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,715 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,741 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,745 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,758 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,762 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,768 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 23:48:08,769 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 23:48:08,770 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 23:48:08,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 23:48:08,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (1/1) ... [2024-11-18 23:48:08,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 23:48:08,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 23:48:08,815 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) [2024-11-18 23:48:08,818 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 [2024-11-18 23:48:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 23:48:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-18 23:48:08,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-18 23:48:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 23:48:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 23:48:08,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 23:48:08,941 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 23:48:08,943 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 23:48:09,589 INFO L? ?]: Removed 53 outVars from TransFormulas that were not future-live. [2024-11-18 23:48:09,590 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 23:48:09,603 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 23:48:09,603 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-18 23:48:09,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:48:09 BoogieIcfgContainer [2024-11-18 23:48:09,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 23:48:09,605 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 23:48:09,605 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 23:48:09,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 23:48:09,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:48:08" (1/3) ... [2024-11-18 23:48:09,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6de093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:48:09, skipping insertion in model container [2024-11-18 23:48:09,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:48:08" (2/3) ... [2024-11-18 23:48:09,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6de093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:48:09, skipping insertion in model container [2024-11-18 23:48:09,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:48:09" (3/3) ... [2024-11-18 23:48:09,609 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-84.i [2024-11-18 23:48:09,620 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 23:48:09,621 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 23:48:09,667 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 23:48:09,673 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;@5d1cafe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 23:48:09,673 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 23:48:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 134 states have (on average 1.5) internal successors, (201), 135 states have internal predecessors, (201), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-18 23:48:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2024-11-18 23:48:09,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:48:09,694 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:48:09,695 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:48:09,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:48:09,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1369704711, now seen corresponding path program 1 times [2024-11-18 23:48:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:48:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462733479] [2024-11-18 23:48:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:48:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2024-11-18 23:48:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:48:10,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462733479] [2024-11-18 23:48:10,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462733479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 23:48:10,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267238164] [2024-11-18 23:48:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:10,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:10,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 23:48:10,110 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) [2024-11-18 23:48:10,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 23:48:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:10,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-18 23:48:10,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 23:48:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2024-11-18 23:48:10,353 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 23:48:10,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267238164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 23:48:10,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 23:48:10,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-18 23:48:10,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369737065] [2024-11-18 23:48:10,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 23:48:10,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 23:48:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:48:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 23:48:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 23:48:10,378 INFO L87 Difference]: Start difference. First operand has 184 states, 134 states have (on average 1.5) internal successors, (201), 135 states have internal predecessors, (201), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) [2024-11-18 23:48:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 23:48:10,413 INFO L93 Difference]: Finished difference Result 361 states and 631 transitions. [2024-11-18 23:48:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 23:48:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) Word has length 312 [2024-11-18 23:48:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 23:48:10,423 INFO L225 Difference]: With dead ends: 361 [2024-11-18 23:48:10,423 INFO L226 Difference]: Without dead ends: 180 [2024-11-18 23:48:10,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 23:48:10,428 INFO L432 NwaCegarLoop]: 288 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, 288 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 [2024-11-18 23:48:10,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 23:48:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-18 23:48:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-11-18 23:48:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 131 states have (on average 1.4809160305343512) internal successors, (194), 131 states have internal predecessors, (194), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-18 23:48:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 288 transitions. [2024-11-18 23:48:10,475 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 288 transitions. Word has length 312 [2024-11-18 23:48:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 23:48:10,476 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 288 transitions. [2024-11-18 23:48:10,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) [2024-11-18 23:48:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 288 transitions. [2024-11-18 23:48:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2024-11-18 23:48:10,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:48:10,486 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:48:10,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 23:48:10,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-18 23:48:10,687 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:48:10,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:48:10,688 INFO L85 PathProgramCache]: Analyzing trace with hash -863518525, now seen corresponding path program 1 times [2024-11-18 23:48:10,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:48:10,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570060749] [2024-11-18 23:48:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:48:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2024-11-18 23:48:11,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:48:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570060749] [2024-11-18 23:48:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570060749] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 23:48:11,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 23:48:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 23:48:11,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360604631] [2024-11-18 23:48:11,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 23:48:11,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 23:48:11,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:48:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 23:48:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 23:48:11,011 INFO L87 Difference]: Start difference. First operand 180 states and 288 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2024-11-18 23:48:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 23:48:11,123 INFO L93 Difference]: Finished difference Result 533 states and 856 transitions. [2024-11-18 23:48:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 23:48:11,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) Word has length 312 [2024-11-18 23:48:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 23:48:11,131 INFO L225 Difference]: With dead ends: 533 [2024-11-18 23:48:11,132 INFO L226 Difference]: Without dead ends: 356 [2024-11-18 23:48:11,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 23:48:11,135 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 250 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 23:48:11,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 550 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 23:48:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-11-18 23:48:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2024-11-18 23:48:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 255 states have (on average 1.4666666666666666) internal successors, (374), 255 states have internal predecessors, (374), 94 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-18 23:48:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 562 transitions. [2024-11-18 23:48:11,183 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 562 transitions. Word has length 312 [2024-11-18 23:48:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 23:48:11,185 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 562 transitions. [2024-11-18 23:48:11,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2024-11-18 23:48:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 562 transitions. [2024-11-18 23:48:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2024-11-18 23:48:11,190 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:48:11,190 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:48:11,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 23:48:11,190 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:48:11,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:48:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2143382203, now seen corresponding path program 1 times [2024-11-18 23:48:11,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:48:11,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993956215] [2024-11-18 23:48:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:11,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:48:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 75 proven. 63 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2024-11-18 23:48:11,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:48:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993956215] [2024-11-18 23:48:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993956215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 23:48:11,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240571971] [2024-11-18 23:48:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:11,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:11,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 23:48:11,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 23:48:11,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 23:48:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:12,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 23:48:12,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 23:48:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 1452 proven. 27 refuted. 0 times theorem prover too weak. 2845 trivial. 0 not checked. [2024-11-18 23:48:12,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 23:48:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 111 proven. 27 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2024-11-18 23:48:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240571971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 23:48:13,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 23:48:13,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 14 [2024-11-18 23:48:13,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903302095] [2024-11-18 23:48:13,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 23:48:13,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 23:48:13,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:48:13,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 23:48:13,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-18 23:48:13,113 INFO L87 Difference]: Start difference. First operand 352 states and 562 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 5 states have call predecessors, (141), 5 states have call successors, (141) [2024-11-18 23:48:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 23:48:14,127 INFO L93 Difference]: Finished difference Result 1195 states and 1873 transitions. [2024-11-18 23:48:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-18 23:48:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 5 states have call predecessors, (141), 5 states have call successors, (141) Word has length 312 [2024-11-18 23:48:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 23:48:14,135 INFO L225 Difference]: With dead ends: 1195 [2024-11-18 23:48:14,136 INFO L226 Difference]: Without dead ends: 846 [2024-11-18 23:48:14,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 617 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2024-11-18 23:48:14,139 INFO L432 NwaCegarLoop]: 202 mSDtfsCounter, 1075 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-18 23:48:14,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 1328 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-18 23:48:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2024-11-18 23:48:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 702. [2024-11-18 23:48:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 503 states have (on average 1.3976143141153081) internal successors, (703), 503 states have internal predecessors, (703), 188 states have call successors, (188), 10 states have call predecessors, (188), 10 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2024-11-18 23:48:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1079 transitions. [2024-11-18 23:48:14,210 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1079 transitions. Word has length 312 [2024-11-18 23:48:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 23:48:14,212 INFO L471 AbstractCegarLoop]: Abstraction has 702 states and 1079 transitions. [2024-11-18 23:48:14,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 5 states have call predecessors, (141), 5 states have call successors, (141) [2024-11-18 23:48:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1079 transitions. [2024-11-18 23:48:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2024-11-18 23:48:14,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:48:14,215 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:48:14,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 23:48:14,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-18 23:48:14,416 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:48:14,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:48:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1184265409, now seen corresponding path program 1 times [2024-11-18 23:48:14,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:48:14,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798058990] [2024-11-18 23:48:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:14,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:48:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 39 proven. 99 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2024-11-18 23:48:16,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:48:16,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798058990] [2024-11-18 23:48:16,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798058990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 23:48:16,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703330048] [2024-11-18 23:48:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:16,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 23:48:16,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 23:48:16,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 23:48:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:17,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-18 23:48:17,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 23:48:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2081 proven. 390 refuted. 0 times theorem prover too weak. 1853 trivial. 0 not checked. [2024-11-18 23:48:20,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 23:48:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703330048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 23:48:21,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 23:48:21,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 25 [2024-11-18 23:48:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019384601] [2024-11-18 23:48:21,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 23:48:21,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-18 23:48:21,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:48:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-18 23:48:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=799, Unknown=6, NotChecked=0, Total=930 [2024-11-18 23:48:21,585 INFO L87 Difference]: Start difference. First operand 702 states and 1079 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 6 states have call successors, (86), 5 states have call predecessors, (86), 9 states have return successors, (87), 6 states have call predecessors, (87), 6 states have call successors, (87) [2024-11-18 23:48:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 23:48:43,822 INFO L93 Difference]: Finished difference Result 2995 states and 4327 transitions. [2024-11-18 23:48:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-18 23:48:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 6 states have call successors, (86), 5 states have call predecessors, (86), 9 states have return successors, (87), 6 states have call predecessors, (87), 6 states have call successors, (87) Word has length 312 [2024-11-18 23:48:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 23:48:43,838 INFO L225 Difference]: With dead ends: 2995 [2024-11-18 23:48:43,840 INFO L226 Difference]: Without dead ends: 2296 [2024-11-18 23:48:43,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1934, Invalid=6273, Unknown=165, NotChecked=0, Total=8372 [2024-11-18 23:48:43,845 INFO L432 NwaCegarLoop]: 257 mSDtfsCounter, 2492 mSDsluCounter, 2282 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 387 mSolverCounterUnsat, 948 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2493 SdHoareTripleChecker+Valid, 2539 SdHoareTripleChecker+Invalid, 3856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 948 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2024-11-18 23:48:43,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2493 Valid, 2539 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2521 Invalid, 948 Unknown, 0 Unchecked, 14.5s Time] [2024-11-18 23:48:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2024-11-18 23:48:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1441. [2024-11-18 23:48:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1166 states have (on average 1.3910806174957118) internal successors, (1622), 1171 states have internal predecessors, (1622), 227 states have call successors, (227), 47 states have call predecessors, (227), 47 states have return successors, (227), 222 states have call predecessors, (227), 227 states have call successors, (227) [2024-11-18 23:48:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2076 transitions. [2024-11-18 23:48:43,986 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2076 transitions. Word has length 312 [2024-11-18 23:48:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 23:48:43,986 INFO L471 AbstractCegarLoop]: Abstraction has 1441 states and 2076 transitions. [2024-11-18 23:48:43,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 6 states have call successors, (86), 5 states have call predecessors, (86), 9 states have return successors, (87), 6 states have call predecessors, (87), 6 states have call successors, (87) [2024-11-18 23:48:43,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2076 transitions. [2024-11-18 23:48:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2024-11-18 23:48:43,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:48:43,990 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:48:44,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 23:48:44,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:44,192 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:48:44,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:48:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash -809879297, now seen corresponding path program 1 times [2024-11-18 23:48:44,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:48:44,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332837503] [2024-11-18 23:48:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:44,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:48:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2024-11-18 23:48:44,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:48:44,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332837503] [2024-11-18 23:48:44,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332837503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 23:48:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397227735] [2024-11-18 23:48:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:44,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:44,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 23:48:44,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 23:48:44,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 23:48:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:44,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 23:48:44,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 23:48:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 1936 proven. 93 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2024-11-18 23:48:45,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 23:48:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2024-11-18 23:48:45,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397227735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 23:48:45,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 23:48:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7] total 15 [2024-11-18 23:48:45,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616201072] [2024-11-18 23:48:45,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 23:48:45,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 23:48:45,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:48:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 23:48:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-18 23:48:45,989 INFO L87 Difference]: Start difference. First operand 1441 states and 2076 transitions. Second operand has 15 states, 15 states have (on average 14.133333333333333) internal successors, (212), 15 states have internal predecessors, (212), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 5 states have call predecessors, (141), 5 states have call successors, (141) [2024-11-18 23:48:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 23:48:47,410 INFO L93 Difference]: Finished difference Result 5276 states and 7417 transitions. [2024-11-18 23:48:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-18 23:48:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 14.133333333333333) internal successors, (212), 15 states have internal predecessors, (212), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 5 states have call predecessors, (141), 5 states have call successors, (141) Word has length 312 [2024-11-18 23:48:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 23:48:47,429 INFO L225 Difference]: With dead ends: 5276 [2024-11-18 23:48:47,430 INFO L226 Difference]: Without dead ends: 3862 [2024-11-18 23:48:47,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2024-11-18 23:48:47,434 INFO L432 NwaCegarLoop]: 221 mSDtfsCounter, 962 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-18 23:48:47,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 2096 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-18 23:48:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2024-11-18 23:48:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2458. [2024-11-18 23:48:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 1937 states have (on average 1.3722250903458957) internal successors, (2658), 1943 states have internal predecessors, (2658), 427 states have call successors, (427), 93 states have call predecessors, (427), 93 states have return successors, (427), 421 states have call predecessors, (427), 427 states have call successors, (427) [2024-11-18 23:48:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3512 transitions. [2024-11-18 23:48:47,662 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3512 transitions. Word has length 312 [2024-11-18 23:48:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 23:48:47,663 INFO L471 AbstractCegarLoop]: Abstraction has 2458 states and 3512 transitions. [2024-11-18 23:48:47,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.133333333333333) internal successors, (212), 15 states have internal predecessors, (212), 5 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 5 states have call predecessors, (141), 5 states have call successors, (141) [2024-11-18 23:48:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3512 transitions. [2024-11-18 23:48:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2024-11-18 23:48:47,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:48:47,667 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:48:47,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-18 23:48:47,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:47,871 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:48:47,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:48:47,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1521799217, now seen corresponding path program 1 times [2024-11-18 23:48:47,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:48:47,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363506476] [2024-11-18 23:48:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:47,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:48:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2024-11-18 23:48:47,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:48:47,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363506476] [2024-11-18 23:48:47,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363506476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 23:48:47,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 23:48:47,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 23:48:47,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444784609] [2024-11-18 23:48:47,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 23:48:47,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 23:48:47,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:48:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 23:48:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 23:48:47,988 INFO L87 Difference]: Start difference. First operand 2458 states and 3512 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2024-11-18 23:48:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 23:48:48,264 INFO L93 Difference]: Finished difference Result 5756 states and 8211 transitions. [2024-11-18 23:48:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 23:48:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) Word has length 313 [2024-11-18 23:48:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 23:48:48,281 INFO L225 Difference]: With dead ends: 5756 [2024-11-18 23:48:48,282 INFO L226 Difference]: Without dead ends: 3325 [2024-11-18 23:48:48,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 23:48:48,289 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 153 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 23:48:48,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 596 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 23:48:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2024-11-18 23:48:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3251. [2024-11-18 23:48:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2516 states have (on average 1.3616852146263911) internal successors, (3426), 2521 states have internal predecessors, (3426), 603 states have call successors, (603), 131 states have call predecessors, (603), 131 states have return successors, (603), 598 states have call predecessors, (603), 603 states have call successors, (603) [2024-11-18 23:48:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4632 transitions. [2024-11-18 23:48:48,580 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4632 transitions. Word has length 313 [2024-11-18 23:48:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 23:48:48,581 INFO L471 AbstractCegarLoop]: Abstraction has 3251 states and 4632 transitions. [2024-11-18 23:48:48,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2024-11-18 23:48:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4632 transitions. [2024-11-18 23:48:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2024-11-18 23:48:48,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:48:48,583 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:48:48,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-18 23:48:48,583 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:48:48,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:48:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash -911583650, now seen corresponding path program 1 times [2024-11-18 23:48:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:48:48,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897576778] [2024-11-18 23:48:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:48,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:48:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 23:48:48,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64797833] [2024-11-18 23:48:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:48,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 23:48:48,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 23:48:48,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 23:48:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:49,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-18 23:48:49,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 23:48:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2647 proven. 294 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2024-11-18 23:48:50,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 23:48:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:48:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897576778] [2024-11-18 23:48:51,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 23:48:51,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64797833] [2024-11-18 23:48:51,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64797833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 23:48:51,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 23:48:51,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-18 23:48:51,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108963375] [2024-11-18 23:48:51,444 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 23:48:51,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 23:48:51,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:48:51,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 23:48:51,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-11-18 23:48:51,445 INFO L87 Difference]: Start difference. First operand 3251 states and 4632 transitions. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 15 states have internal predecessors, (100), 5 states have call successors, (47), 5 states have call predecessors, (47), 7 states have return successors, (47), 5 states have call predecessors, (47), 5 states have call successors, (47) [2024-11-18 23:48:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 23:48:52,749 INFO L93 Difference]: Finished difference Result 8261 states and 11570 transitions. [2024-11-18 23:48:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-18 23:48:52,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 15 states have internal predecessors, (100), 5 states have call successors, (47), 5 states have call predecessors, (47), 7 states have return successors, (47), 5 states have call predecessors, (47), 5 states have call successors, (47) Word has length 314 [2024-11-18 23:48:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 23:48:52,769 INFO L225 Difference]: With dead ends: 8261 [2024-11-18 23:48:52,769 INFO L226 Difference]: Without dead ends: 5037 [2024-11-18 23:48:52,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2024-11-18 23:48:52,777 INFO L432 NwaCegarLoop]: 210 mSDtfsCounter, 797 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 92 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-18 23:48:52,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 1098 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1107 Invalid, 6 Unknown, 0 Unchecked, 0.7s Time] [2024-11-18 23:48:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2024-11-18 23:48:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 3533. [2024-11-18 23:48:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 2754 states have (on average 1.3496732026143792) internal successors, (3717), 2760 states have internal predecessors, (3717), 615 states have call successors, (615), 163 states have call predecessors, (615), 163 states have return successors, (615), 609 states have call predecessors, (615), 615 states have call successors, (615) [2024-11-18 23:48:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 4947 transitions. [2024-11-18 23:48:53,190 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 4947 transitions. Word has length 314 [2024-11-18 23:48:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 23:48:53,192 INFO L471 AbstractCegarLoop]: Abstraction has 3533 states and 4947 transitions. [2024-11-18 23:48:53,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 15 states have internal predecessors, (100), 5 states have call successors, (47), 5 states have call predecessors, (47), 7 states have return successors, (47), 5 states have call predecessors, (47), 5 states have call successors, (47) [2024-11-18 23:48:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 4947 transitions. [2024-11-18 23:48:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2024-11-18 23:48:53,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:48:53,197 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:48:53,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 23:48:53,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:53,398 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:48:53,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:48:53,398 INFO L85 PathProgramCache]: Analyzing trace with hash 822330198, now seen corresponding path program 1 times [2024-11-18 23:48:53,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:48:53,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996758442] [2024-11-18 23:48:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:53,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:48:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2024-11-18 23:48:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:48:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996758442] [2024-11-18 23:48:54,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996758442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 23:48:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16957479] [2024-11-18 23:48:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:48:54,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:48:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 23:48:54,933 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 23:48:54,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 23:48:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:48:55,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 23:48:55,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 23:48:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2717 proven. 114 refuted. 0 times theorem prover too weak. 1493 trivial. 0 not checked. [2024-11-18 23:48:55,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 23:48:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 156 proven. 117 refuted. 0 times theorem prover too weak. 4051 trivial. 0 not checked. [2024-11-18 23:48:56,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16957479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 23:48:56,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 23:48:56,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 27 [2024-11-18 23:48:56,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124736456] [2024-11-18 23:48:56,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 23:48:56,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-18 23:48:56,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:48:56,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-18 23:48:56,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2024-11-18 23:48:56,869 INFO L87 Difference]: Start difference. First operand 3533 states and 4947 transitions. Second operand has 27 states, 27 states have (on average 8.037037037037036) internal successors, (217), 27 states have internal predecessors, (217), 9 states have call successors, (141), 4 states have call predecessors, (141), 9 states have return successors, (141), 9 states have call predecessors, (141), 9 states have call successors, (141) [2024-11-18 23:49:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 23:49:00,165 INFO L93 Difference]: Finished difference Result 14913 states and 20704 transitions. [2024-11-18 23:49:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-18 23:49:00,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 8.037037037037036) internal successors, (217), 27 states have internal predecessors, (217), 9 states have call successors, (141), 4 states have call predecessors, (141), 9 states have return successors, (141), 9 states have call predecessors, (141), 9 states have call successors, (141) Word has length 315 [2024-11-18 23:49:00,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 23:49:00,211 INFO L225 Difference]: With dead ends: 14913 [2024-11-18 23:49:00,212 INFO L226 Difference]: Without dead ends: 11407 [2024-11-18 23:49:00,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=968, Invalid=2692, Unknown=0, NotChecked=0, Total=3660 [2024-11-18 23:49:00,221 INFO L432 NwaCegarLoop]: 317 mSDtfsCounter, 2214 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2250 SdHoareTripleChecker+Valid, 3224 SdHoareTripleChecker+Invalid, 3555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-18 23:49:00,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2250 Valid, 3224 Invalid, 3555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-18 23:49:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11407 states. [2024-11-18 23:49:01,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11407 to 8379. [2024-11-18 23:49:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8379 states, 6470 states have (on average 1.3389489953632148) internal successors, (8663), 6481 states have internal predecessors, (8663), 1491 states have call successors, (1491), 417 states have call predecessors, (1491), 417 states have return successors, (1491), 1480 states have call predecessors, (1491), 1491 states have call successors, (1491) [2024-11-18 23:49:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 11645 transitions. [2024-11-18 23:49:01,251 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 11645 transitions. Word has length 315 [2024-11-18 23:49:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 23:49:01,251 INFO L471 AbstractCegarLoop]: Abstraction has 8379 states and 11645 transitions. [2024-11-18 23:49:01,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.037037037037036) internal successors, (217), 27 states have internal predecessors, (217), 9 states have call successors, (141), 4 states have call predecessors, (141), 9 states have return successors, (141), 9 states have call predecessors, (141), 9 states have call successors, (141) [2024-11-18 23:49:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 11645 transitions. [2024-11-18 23:49:01,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2024-11-18 23:49:01,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 23:49:01,255 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 23:49:01,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 23:49:01,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:49:01,456 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 23:49:01,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 23:49:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash 884369812, now seen corresponding path program 1 times [2024-11-18 23:49:01,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 23:49:01,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549380188] [2024-11-18 23:49:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:49:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 23:49:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 23:49:01,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138914031] [2024-11-18 23:49:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 23:49:01,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 23:49:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 23:49:01,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 23:49:01,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 23:49:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 23:49:01,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-18 23:49:01,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 23:49:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2985 proven. 234 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2024-11-18 23:49:03,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 23:49:22,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 23:49:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549380188] [2024-11-18 23:49:22,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 23:49:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138914031] [2024-11-18 23:49:22,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138914031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 23:49:22,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 23:49:22,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-18 23:49:22,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816842613] [2024-11-18 23:49:22,438 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 23:49:22,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 23:49:22,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 23:49:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 23:49:22,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=335, Unknown=11, NotChecked=0, Total=420 [2024-11-18 23:49:22,440 INFO L87 Difference]: Start difference. First operand 8379 states and 11645 transitions. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 15 states have internal predecessors, (101), 4 states have call successors, (47), 4 states have call predecessors, (47), 7 states have return successors, (47), 4 states have call predecessors, (47), 4 states have call successors, (47)